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559 lines
20 KiB
Mathematica
559 lines
20 KiB
Mathematica
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//
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// MCSwipeTableViewCell.m
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// MCSwipeTableViewCell
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//
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// Created by Ali Karagoz on 24/02/13.
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// Copyright (c) 2013 Mad Castle. All rights reserved.
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//
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#import "MCSwipeTableViewCell.h"
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static CGFloat const kMCStop1 = 0.15; // Percentage limit to trigger the first action
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static CGFloat const kMCStop2 = 0.75; // Percentage limit to trigger the second action
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static CGFloat const kMCBounceAmplitude = 20.0; // Maximum bounce amplitude when using the MCSwipeTableViewCellModeSwitch mode
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static NSTimeInterval const kMCBounceDuration1 = 0.2; // Duration of the first part of the bounce animation
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static NSTimeInterval const kMCBounceDuration2 = 0.1; // Duration of the second part of the bounce animation
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static NSTimeInterval const kMCDurationLowLimit = 0.25; // Lowest duration when swipping the cell because we try to simulate velocity
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static NSTimeInterval const kMCDurationHightLimit = 0.1; // Highest duration when swipping the cell because we try to simulate velocity
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@interface MCSwipeTableViewCell () <UIGestureRecognizerDelegate>
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@property (nonatomic, assign) MCSwipeTableViewCellDirection direction;
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@property (nonatomic, assign) CGFloat currentPercentage;
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@property (nonatomic, strong) UIPanGestureRecognizer *panGestureRecognizer;
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@property (nonatomic, strong) UIImageView *slidingImageView;
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@property (nonatomic, strong) NSString *currentImageName;
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@property (nonatomic, strong) UIView *colorIndicatorView;
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@end
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@implementation MCSwipeTableViewCell
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#pragma mark - Initialization
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- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier {
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self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
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if (self) {
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[self initializer];
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}
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return self;
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}
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- (id)initWithCoder:(NSCoder *)aDecoder {
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self = [super initWithCoder:aDecoder];
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if (self) {
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[self initializer];
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}
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return self;
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}
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- (id)init {
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self = [super init];
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if (self) {
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[self initializer];
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}
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return self;
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}
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#pragma mark - Custom Initializer
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- (id)initWithStyle:(UITableViewCellStyle)style
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reuseIdentifier:(NSString *)reuseIdentifier
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firstStateIconName:(NSString *)firstIconName
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firstColor:(UIColor *)firstColor
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secondStateIconName:(NSString *)secondIconName
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secondColor:(UIColor *)secondColor
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thirdIconName:(NSString *)thirdIconName
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thirdColor:(UIColor *)thirdColor
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fourthIconName:(NSString *)fourthIconName
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fourthColor:(UIColor *)fourthColor {
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self = [self initWithStyle:style reuseIdentifier:reuseIdentifier];
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if (self) {
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[self setFirstStateIconName:firstIconName
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firstColor:firstColor
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secondStateIconName:secondIconName
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secondColor:secondColor
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thirdIconName:thirdIconName
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thirdColor:thirdColor
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fourthIconName:fourthIconName
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fourthColor:fourthColor];
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}
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return self;
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}
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- (void)initializer {
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_mode = MCSwipeTableViewCellModeNone;
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_colorIndicatorView = [[UIView alloc] initWithFrame:self.bounds];
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[_colorIndicatorView setAutoresizingMask:UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth];
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[_colorIndicatorView setBackgroundColor:(self.defaultColor ? self.defaultColor : [UIColor clearColor])];
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[self insertSubview:_colorIndicatorView atIndex:0];
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_slidingImageView = [[UIImageView alloc] init];
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[_slidingImageView setContentMode:UIViewContentModeCenter];
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[_colorIndicatorView addSubview:_slidingImageView];
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_panGestureRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(handlePanGestureRecognizer:)];
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[self addGestureRecognizer:_panGestureRecognizer];
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[_panGestureRecognizer setDelegate:self];
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_isDragging = NO;
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// By default the cells are draggable
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_shouldDrag = YES;
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// By default the icons are animating
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_shouldAnimatesIcons = YES;
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// Set state modes
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_modeForState1 = MCSwipeTableViewCellModeNone;
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_modeForState2 = MCSwipeTableViewCellModeNone;
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_modeForState3 = MCSwipeTableViewCellModeNone;
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_modeForState4 = MCSwipeTableViewCellModeNone;
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}
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#pragma mark - Setter
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- (void)setFirstStateIconName:(NSString *)firstIconName
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firstColor:(UIColor *)firstColor
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secondStateIconName:(NSString *)secondIconName
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secondColor:(UIColor *)secondColor
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thirdIconName:(NSString *)thirdIconName
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thirdColor:(UIColor *)thirdColor
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fourthIconName:(NSString *)fourthIconName
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fourthColor:(UIColor *)fourthColor {
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[self setFirstIconName:firstIconName];
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[self setSecondIconName:secondIconName];
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[self setThirdIconName:thirdIconName];
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[self setFourthIconName:fourthIconName];
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[self setFirstColor:firstColor];
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[self setSecondColor:secondColor];
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[self setThirdColor:thirdColor];
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[self setFourthColor:fourthColor];
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}
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#pragma mark - Prepare reuse
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- (void)prepareForReuse {
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[super prepareForReuse];
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// Clearing before presenting back the cell to the user
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[_colorIndicatorView setBackgroundColor:[UIColor clearColor]];
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// clearing the dragging flag
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_isDragging = NO;
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// Before reuse we need to reset it's state
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_shouldDrag = YES;
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_shouldAnimatesIcons = YES;
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_mode = MCSwipeTableViewCellModeNone;
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_modeForState1 = MCSwipeTableViewCellModeNone;
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_modeForState2 = MCSwipeTableViewCellModeNone;
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_modeForState3 = MCSwipeTableViewCellModeNone;
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_modeForState4 = MCSwipeTableViewCellModeNone;
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}
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#pragma mark - Handle Gestures
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- (void)handlePanGestureRecognizer:(UIPanGestureRecognizer *)gesture {
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// The user do not want you to be dragged!
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if (!_shouldDrag) return;
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UIGestureRecognizerState state = [gesture state];
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CGPoint translation = [gesture translationInView:self];
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CGPoint velocity = [gesture velocityInView:self];
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CGFloat percentage = [self percentageWithOffset:CGRectGetMinX(self.contentView.frame) relativeToWidth:CGRectGetWidth(self.bounds)];
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NSTimeInterval animationDuration = [self animationDurationWithVelocity:velocity];
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_direction = [self directionWithPercentage:percentage];
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if (state == UIGestureRecognizerStateBegan || state == UIGestureRecognizerStateChanged) {
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_isDragging = YES;
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CGPoint center = {self.contentView.center.x + translation.x, self.contentView.center.y};
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NSLog(@"Center: %@", NSStringFromCGPoint(center));
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[self.contentView setCenter:center];
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[self animateWithOffset:CGRectGetMinX(self.contentView.frame)];
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[gesture setTranslation:CGPointZero inView:self];
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// Notifying the delegate that we are dragging with an offset percentage
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if ([_delegate respondsToSelector:@selector(swipeTableViewCell:didSwipWithPercentage:)]) {
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[_delegate swipeTableViewCell:self didSwipWithPercentage:percentage];
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}
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}
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else if (state == UIGestureRecognizerStateEnded || state == UIGestureRecognizerStateCancelled) {
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_isDragging = NO;
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_currentImageName = [self imageNameWithPercentage:percentage];
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_currentPercentage = percentage;
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// Current state
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MCSwipeTableViewCellState cellState = [self stateWithPercentage:percentage];
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// Current mode
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MCSwipeTableViewCellMode cellMode;
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if (cellState == MCSwipeTableViewCellState1 && self.modeForState1 != MCSwipeTableViewCellModeNone) {
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cellMode = self.modeForState1;
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} else if (cellState == MCSwipeTableViewCellState2 && self.modeForState2 != MCSwipeTableViewCellModeNone) {
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cellMode = self.modeForState2;
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} else if (cellState == MCSwipeTableViewCellState3 && self.modeForState3 != MCSwipeTableViewCellModeNone) {
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cellMode = self.modeForState3;
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} else if (cellState == MCSwipeTableViewCellState4 && self.modeForState4 != MCSwipeTableViewCellModeNone) {
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cellMode = self.modeForState4;
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} else {
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cellMode = self.mode;
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}
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if (cellMode == MCSwipeTableViewCellModeExit && _direction != MCSwipeTableViewCellDirectionCenter && [self validateState:cellState])
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[self moveWithDuration:animationDuration andDirection:_direction];
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else
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[self bounceToOrigin];
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}
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}
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#pragma mark - UIGestureRecognizerDelegate
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- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer {
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if ([gestureRecognizer class] == [UIPanGestureRecognizer class]) {
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UIPanGestureRecognizer *g = (UIPanGestureRecognizer *)gestureRecognizer;
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CGPoint point = [g velocityInView:self];
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if (fabsf(point.x) > fabsf(point.y) ) {
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// We notify the delegate that we just started dragging
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if ([_delegate respondsToSelector:@selector(swipeTableViewCellDidStartSwiping:)]) {
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[_delegate swipeTableViewCellDidStartSwiping:self];
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}
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return YES;
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}
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}
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return NO;
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}
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#pragma mark - Utils
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- (CGFloat)offsetWithPercentage:(CGFloat)percentage relativeToWidth:(CGFloat)width {
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CGFloat offset = percentage * width;
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if (offset < -width) offset = -width;
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else if (offset > width) offset = width;
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return offset;
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}
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- (CGFloat)percentageWithOffset:(CGFloat)offset relativeToWidth:(CGFloat)width {
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CGFloat percentage = offset / width;
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if (percentage < -1.0) percentage = -1.0;
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else if (percentage > 1.0) percentage = 1.0;
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return percentage;
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}
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- (NSTimeInterval)animationDurationWithVelocity:(CGPoint)velocity {
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CGFloat width = CGRectGetWidth(self.bounds);
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NSTimeInterval animationDurationDiff = kMCDurationHightLimit - kMCDurationLowLimit;
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CGFloat horizontalVelocity = velocity.x;
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if (horizontalVelocity < -width) horizontalVelocity = -width;
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else if (horizontalVelocity > width) horizontalVelocity = width;
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return (kMCDurationHightLimit + kMCDurationLowLimit) - fabs(((horizontalVelocity / width) * animationDurationDiff));
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}
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- (MCSwipeTableViewCellDirection)directionWithPercentage:(CGFloat)percentage {
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if (percentage < 0)
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return MCSwipeTableViewCellDirectionLeft;
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else if (percentage > 0)
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return MCSwipeTableViewCellDirectionRight;
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else
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return MCSwipeTableViewCellDirectionCenter;
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}
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- (NSString *)imageNameWithPercentage:(CGFloat)percentage {
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NSString *imageName;
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// Image
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if (percentage >= 0 && percentage < kMCStop2)
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imageName = _firstIconName;
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else if (percentage >= kMCStop2)
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imageName = _secondIconName;
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else if (percentage < 0 && percentage > -kMCStop2)
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imageName = _thirdIconName;
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else if (percentage <= -kMCStop2)
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imageName = _fourthIconName;
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return imageName;
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}
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- (CGFloat)imageAlphaWithPercentage:(CGFloat)percentage {
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CGFloat alpha;
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if (percentage >= 0 && percentage < kMCStop1)
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alpha = percentage / kMCStop1;
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else if (percentage < 0 && percentage > -kMCStop1)
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alpha = fabsf(percentage / kMCStop1);
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else alpha = 1.0;
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return alpha;
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}
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- (UIColor *)colorWithPercentage:(CGFloat)percentage {
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UIColor *color;
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// Background Color
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if (percentage >= kMCStop1 && percentage < kMCStop2)
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color = _firstColor;
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else if (percentage >= kMCStop2)
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color = _secondColor;
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else if (percentage < -kMCStop1 && percentage > -kMCStop2)
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color = _thirdColor;
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else if (percentage <= -kMCStop2)
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color = _fourthColor;
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else
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color = self.defaultColor ? self.defaultColor : [UIColor clearColor];
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return color;
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}
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- (MCSwipeTableViewCellState)stateWithPercentage:(CGFloat)percentage {
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MCSwipeTableViewCellState state;
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state = MCSwipeTableViewCellStateNone;
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if (percentage >= kMCStop1 && [self validateState:MCSwipeTableViewCellState1])
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state = MCSwipeTableViewCellState1;
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if (percentage >= kMCStop2 && [self validateState:MCSwipeTableViewCellState2])
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state = MCSwipeTableViewCellState2;
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if (percentage <= -kMCStop1 && [self validateState:MCSwipeTableViewCellState3])
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state = MCSwipeTableViewCellState3;
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if (percentage <= -kMCStop2 && [self validateState:MCSwipeTableViewCellState4])
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state = MCSwipeTableViewCellState4;
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return state;
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}
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- (BOOL)validateState:(MCSwipeTableViewCellState)state {
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BOOL isValid = YES;
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switch (state) {
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case MCSwipeTableViewCellStateNone: {
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isValid = NO;
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}
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break;
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case MCSwipeTableViewCellState1: {
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if (!_firstColor && !_firstIconName)
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isValid = NO;
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}
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break;
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case MCSwipeTableViewCellState2: {
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if (!_secondColor && !_secondIconName)
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isValid = NO;
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}
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break;
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case MCSwipeTableViewCellState3: {
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if (!_thirdColor && !_thirdIconName)
|
||
|
|
isValid = NO;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
|
||
|
|
case MCSwipeTableViewCellState4: {
|
||
|
|
if (!_fourthColor && !_fourthIconName)
|
||
|
|
isValid = NO;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
|
||
|
|
default:
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
return isValid;
|
||
|
|
}
|
||
|
|
|
||
|
|
#pragma mark - Movement
|
||
|
|
|
||
|
|
- (void)animateWithOffset:(CGFloat)offset {
|
||
|
|
CGFloat percentage = [self percentageWithOffset:offset relativeToWidth:CGRectGetWidth(self.bounds)];
|
||
|
|
|
||
|
|
// Image Name
|
||
|
|
NSString *imageName = [self imageNameWithPercentage:percentage];
|
||
|
|
|
||
|
|
// Image Position
|
||
|
|
if (imageName != nil) {
|
||
|
|
[_slidingImageView setImage:[UIImage imageNamed:imageName]];
|
||
|
|
[_slidingImageView setAlpha:[self imageAlphaWithPercentage:percentage]];
|
||
|
|
[self slideImageWithPercentage:percentage imageName:imageName isDragging:self.shouldAnimatesIcons];
|
||
|
|
}
|
||
|
|
|
||
|
|
// Color
|
||
|
|
UIColor *color = [self colorWithPercentage:percentage];
|
||
|
|
if (color != nil) {
|
||
|
|
[_colorIndicatorView setBackgroundColor:color];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
- (void)slideImageWithPercentage:(CGFloat)percentage imageName:(NSString *)imageName isDragging:(BOOL)isDragging {
|
||
|
|
UIImage *slidingImage = [UIImage imageNamed:imageName];
|
||
|
|
CGSize slidingImageSize = slidingImage.size;
|
||
|
|
CGRect slidingImageRect;
|
||
|
|
|
||
|
|
CGPoint position = CGPointZero;
|
||
|
|
|
||
|
|
position.y = CGRectGetHeight(self.bounds) / 2.0;
|
||
|
|
|
||
|
|
if (isDragging) {
|
||
|
|
if (percentage >= 0 && percentage < kMCStop1) {
|
||
|
|
position.x = [self offsetWithPercentage:(kMCStop1 / 2) relativeToWidth:CGRectGetWidth(self.bounds)];
|
||
|
|
}
|
||
|
|
|
||
|
|
else if (percentage >= kMCStop1) {
|
||
|
|
position.x = [self offsetWithPercentage:percentage - (kMCStop1 / 2) relativeToWidth:CGRectGetWidth(self.bounds)];
|
||
|
|
}
|
||
|
|
else if (percentage < 0 && percentage >= -kMCStop1) {
|
||
|
|
position.x = CGRectGetWidth(self.bounds) - [self offsetWithPercentage:(kMCStop1 / 2) relativeToWidth:CGRectGetWidth(self.bounds)];
|
||
|
|
}
|
||
|
|
|
||
|
|
else if (percentage < -kMCStop1) {
|
||
|
|
position.x = CGRectGetWidth(self.bounds) + [self offsetWithPercentage:percentage + (kMCStop1 / 2) relativeToWidth:CGRectGetWidth(self.bounds)];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
if (_direction == MCSwipeTableViewCellDirectionRight) {
|
||
|
|
position.x = [self offsetWithPercentage:(kMCStop1 / 2) relativeToWidth:CGRectGetWidth(self.bounds)];
|
||
|
|
}
|
||
|
|
else if (_direction == MCSwipeTableViewCellDirectionLeft) {
|
||
|
|
position.x = CGRectGetWidth(self.bounds) - [self offsetWithPercentage:(kMCStop1 / 2) relativeToWidth:CGRectGetWidth(self.bounds)];
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
slidingImageRect = CGRectMake(position.x - slidingImageSize.width / 2.0,
|
||
|
|
position.y - slidingImageSize.height / 2.0,
|
||
|
|
slidingImageSize.width,
|
||
|
|
slidingImageSize.height);
|
||
|
|
|
||
|
|
slidingImageRect = CGRectIntegral(slidingImageRect);
|
||
|
|
[_slidingImageView setFrame:slidingImageRect];
|
||
|
|
}
|
||
|
|
|
||
|
|
- (void)moveWithDuration:(NSTimeInterval)duration andDirection:(MCSwipeTableViewCellDirection)direction {
|
||
|
|
CGFloat origin;
|
||
|
|
|
||
|
|
if (direction == MCSwipeTableViewCellDirectionLeft)
|
||
|
|
origin = -CGRectGetWidth(self.bounds);
|
||
|
|
else
|
||
|
|
origin = CGRectGetWidth(self.bounds);
|
||
|
|
|
||
|
|
CGFloat percentage = [self percentageWithOffset:origin relativeToWidth:CGRectGetWidth(self.bounds)];
|
||
|
|
CGRect rect = self.contentView.frame;
|
||
|
|
rect.origin.x = origin;
|
||
|
|
|
||
|
|
// Color
|
||
|
|
UIColor *color = [self colorWithPercentage:_currentPercentage];
|
||
|
|
if (color != nil) {
|
||
|
|
[_colorIndicatorView setBackgroundColor:color];
|
||
|
|
}
|
||
|
|
|
||
|
|
// Image
|
||
|
|
if (_currentImageName != nil) {
|
||
|
|
[_slidingImageView setImage:[UIImage imageNamed:_currentImageName]];
|
||
|
|
}
|
||
|
|
|
||
|
|
[UIView animateWithDuration:duration
|
||
|
|
delay:0.0
|
||
|
|
options:(UIViewAnimationOptionCurveEaseOut | UIViewAnimationOptionAllowUserInteraction)
|
||
|
|
animations:^{
|
||
|
|
[self.contentView setFrame:rect];
|
||
|
|
[_slidingImageView setAlpha:0];
|
||
|
|
[self slideImageWithPercentage:percentage imageName:_currentImageName isDragging:self.shouldAnimatesIcons];
|
||
|
|
}
|
||
|
|
completion:^(BOOL finished) {
|
||
|
|
[self notifyDelegate];
|
||
|
|
}];
|
||
|
|
}
|
||
|
|
|
||
|
|
- (void)bounceToOrigin {
|
||
|
|
CGFloat bounceDistance = kMCBounceAmplitude * _currentPercentage;
|
||
|
|
|
||
|
|
[UIView animateWithDuration:kMCBounceDuration1
|
||
|
|
delay:0
|
||
|
|
options:(UIViewAnimationOptionCurveEaseOut)
|
||
|
|
animations:^{
|
||
|
|
CGRect frame = self.contentView.frame;
|
||
|
|
frame.origin.x = -bounceDistance;
|
||
|
|
[self.contentView setFrame:frame];
|
||
|
|
[_slidingImageView setAlpha:0.0];
|
||
|
|
[self slideImageWithPercentage:0 imageName:_currentImageName isDragging:NO];
|
||
|
|
|
||
|
|
// Setting back the color to the default
|
||
|
|
_colorIndicatorView.backgroundColor = self.defaultColor;
|
||
|
|
}
|
||
|
|
completion:^(BOOL finished1) {
|
||
|
|
|
||
|
|
[UIView animateWithDuration:kMCBounceDuration2
|
||
|
|
delay:0
|
||
|
|
options:UIViewAnimationOptionCurveEaseIn
|
||
|
|
animations:^{
|
||
|
|
CGRect frame = self.contentView.frame;
|
||
|
|
frame.origin.x = 0;
|
||
|
|
[self.contentView setFrame:frame];
|
||
|
|
|
||
|
|
// Clearing the indicator view
|
||
|
|
_colorIndicatorView.backgroundColor = [UIColor clearColor];
|
||
|
|
}
|
||
|
|
completion:^(BOOL finished2) {
|
||
|
|
[self notifyDelegate];
|
||
|
|
}];
|
||
|
|
}];
|
||
|
|
}
|
||
|
|
|
||
|
|
#pragma mark - Delegate Notification
|
||
|
|
|
||
|
|
- (void)notifyDelegate {
|
||
|
|
MCSwipeTableViewCellState state = [self stateWithPercentage:_currentPercentage];
|
||
|
|
|
||
|
|
MCSwipeTableViewCellMode mode = self.mode;
|
||
|
|
|
||
|
|
if (mode == MCSwipeTableViewCellModeNone) {
|
||
|
|
switch (state) {
|
||
|
|
case MCSwipeTableViewCellState1: {
|
||
|
|
mode = self.modeForState1;
|
||
|
|
} break;
|
||
|
|
|
||
|
|
case MCSwipeTableViewCellState2: {
|
||
|
|
mode = self.modeForState2;
|
||
|
|
} break;
|
||
|
|
|
||
|
|
case MCSwipeTableViewCellState3: {
|
||
|
|
mode = self.modeForState3;
|
||
|
|
} break;
|
||
|
|
|
||
|
|
case MCSwipeTableViewCellState4: {
|
||
|
|
mode = self.modeForState4;
|
||
|
|
} break;
|
||
|
|
|
||
|
|
default:
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (state != MCSwipeTableViewCellStateNone) {
|
||
|
|
if ([_delegate respondsToSelector:@selector(swipeTableViewCell:didEndSwipingSwipingWithState:mode:)]) {
|
||
|
|
[_delegate swipeTableViewCell:self didEndSwipingSwipingWithState:state mode:mode];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
@end
|