// // PullToRefreshView.m // Grant Paul (chpwn) // // (based on EGORefreshTableHeaderView) // // Created by Devin Doty on 10/14/09October14. // Copyright 2009 enormego. All rights reserved. // // Permission is hereby granted, free of charge, to any person obtaining a copy // of this software and associated documentation files (the "Software"), to deal // in the Software without restriction, including without limitation the rights // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell // copies of the Software, and to permit persons to whom the Software is // furnished to do so, subject to the following conditions: // // The above copyright notice and this permission notice shall be included in // all copies or substantial portions of the Software. // // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN // THE SOFTWARE. // #import "PullToRefreshView.h" #define TEXT_COLOR [UIColor colorWithRed:(87.0/255.0) green:(108.0/255.0) blue:(137.0/255.0) alpha:1.0] #define FLIP_ANIMATION_DURATION 0.18f @interface PullToRefreshView (Private) @property (nonatomic, assign) PullToRefreshViewState state; @end @implementation PullToRefreshView @synthesize delegate, scrollView; - (void)showActivity:(BOOL)shouldShow animated:(BOOL)animated { if (shouldShow) [activityView startAnimating]; else [activityView stopAnimating]; [UIView beginAnimations:nil context:nil]; [UIView setAnimationDuration:(animated ? 0.1f : 0.0)]; arrowImage.opacity = (shouldShow ? 0.0 : 1.0); [UIView commitAnimations]; } - (void)setImageFlipped:(BOOL)flipped { [UIView beginAnimations:nil context:NULL]; [UIView setAnimationDuration:0.1f]; arrowImage.transform = (flipped ? CATransform3DMakeRotation(M_PI * 2, 0.0f, 0.0f, 1.0f) : CATransform3DMakeRotation(M_PI, 0.0f, 0.0f, 1.0f)); [UIView commitAnimations]; } - (id)initWithScrollView:(UIScrollView *)scroll { CGRect frame = CGRectMake(0.0f, 0.0f - scroll.bounds.size.height, scroll.bounds.size.width, scroll.bounds.size.height); if ((self = [super initWithFrame:frame])) { scrollView = scroll; [scrollView addObserver:self forKeyPath:@"contentOffset" options:NSKeyValueObservingOptionNew context:NULL]; UIColor *bgColor = UIColorFromRGB(0xF2F2F2); self.autoresizingMask = UIViewAutoresizingFlexibleWidth; self.backgroundColor = bgColor; lastUpdatedLabel = [[UILabel alloc] initWithFrame:CGRectMake(0.0f, frame.size.height - 30.0f, self.frame.size.width, 20.0f)]; lastUpdatedLabel.autoresizingMask = UIViewAutoresizingFlexibleWidth; lastUpdatedLabel.font = [UIFont systemFontOfSize:12.0f]; lastUpdatedLabel.textColor = TEXT_COLOR; lastUpdatedLabel.shadowColor = [UIColor colorWithWhite:0.9f alpha:1.0f]; lastUpdatedLabel.shadowOffset = CGSizeMake(0.0f, 1.0f); lastUpdatedLabel.backgroundColor = [UIColor clearColor]; lastUpdatedLabel.textAlignment = NSTextAlignmentCenter; [self addSubview:lastUpdatedLabel]; statusLabel = [[UILabel alloc] initWithFrame:CGRectMake(0.0f, frame.size.height - 48.0f, self.frame.size.width, 20.0f)]; statusLabel.autoresizingMask = UIViewAutoresizingFlexibleWidth; statusLabel.font = [UIFont boldSystemFontOfSize:13.0f]; statusLabel.textColor = TEXT_COLOR; statusLabel.shadowColor = [UIColor colorWithWhite:0.9f alpha:1.0f]; statusLabel.shadowOffset = CGSizeMake(0.0f, 1.0f); statusLabel.backgroundColor = [UIColor clearColor]; statusLabel.textAlignment = NSTextAlignmentCenter; [self addSubview:statusLabel]; arrowImage = [[CALayer alloc] init]; arrowImage.frame = CGRectMake(25.0f, frame.size.height - 60.0f, 24.0f, 52.0f); arrowImage.contentsGravity = kCAGravityResizeAspect; arrowImage.contents = (id) [UIImage imageNamed:@"arrow"].CGImage; #if __IPHONE_OS_VERSION_MAX_ALLOWED >= 40000 if ([[UIScreen mainScreen] respondsToSelector:@selector(scale)]) { arrowImage.contentsScale = [[UIScreen mainScreen] scale]; } #endif [self.layer addSublayer:arrowImage]; activityView = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray]; activityView.frame = CGRectMake(30.0f, frame.size.height - 38.0f, 20.0f, 20.0f); [self addSubview:activityView]; [self setState:PullToRefreshViewStateNormal]; } return self; } #pragma mark - #pragma mark Setters - (void)refreshLastUpdatedDate { NSDate *date = [NSDate date]; if ([delegate respondsToSelector:@selector(pullToRefreshViewLastUpdated:)]) date = [delegate pullToRefreshViewLastUpdated:self]; NSDateFormatter *formatter = [[NSDateFormatter alloc] init]; formatter.doesRelativeDateFormatting = YES; formatter.timeStyle = NSDateFormatterShortStyle; formatter.dateStyle = NSDateFormatterMediumStyle; lastUpdatedLabel.text = [NSString stringWithFormat:@"Updated %@", [formatter stringFromDate:date]]; // [@[[NSLocale localeWithLocaleIdentifier:@"de_DE"], [NSLocale localeWithLocaleIdentifier:@"es_ES"],[NSLocale localeWithLocaleIdentifier:@"en_US"]] enumerateObjectsUsingBlock:^(NSLocale *locale, NSUInteger idx, BOOL *stop) { // [formatter setLocale:locale]; // [timeFormatter setLocale:locale]; // [formatter setTimeZone:[NSTimeZone systemTimeZone]]; // NSString *dateString=[formatter stringFromDate:date]; // NSString *timeString = [timeFormatter stringFromDate:date]; // NSLog(@"%@ %@", dateString, timeString); // }]; [formatter release]; } - (void)setState:(PullToRefreshViewState)state_ { state = state_; switch (state) { case PullToRefreshViewStateReady: statusLabel.text = @"Release to refresh..."; [self showActivity:NO animated:NO]; [self setImageFlipped:YES]; [self refreshLastUpdatedDate]; scrollView.contentInset = UIEdgeInsetsZero; break; case PullToRefreshViewStateNormal: statusLabel.text = @"Pull down to refresh..."; [self showActivity:NO animated:NO]; [self setImageFlipped:NO]; [self refreshLastUpdatedDate]; scrollView.contentInset = UIEdgeInsetsZero; break; case PullToRefreshViewStateLoading: statusLabel.text = @"Loading..."; [self showActivity:YES animated:YES]; [self setImageFlipped:NO]; [self refreshLastUpdatedDate]; scrollView.contentInset = UIEdgeInsetsMake(60.0f, 0.0f, 0.0f, 0.0f); break; default: break; } } #pragma mark - #pragma mark UIScrollView - (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context { if ([keyPath isEqualToString:@"contentOffset"]) { if (scrollView.isDragging) { if (state == PullToRefreshViewStateReady) { if (scrollView.contentOffset.y > -65.0f && scrollView.contentOffset.y < 0.0f) [self setState:PullToRefreshViewStateNormal]; } else if (state == PullToRefreshViewStateNormal) { if (scrollView.contentOffset.y < -65.0f) [self setState:PullToRefreshViewStateReady]; } else if (state == PullToRefreshViewStateLoading) { if (scrollView.contentOffset.y >= 0) scrollView.contentInset = UIEdgeInsetsZero; else scrollView.contentInset = UIEdgeInsetsMake(MIN(-scrollView.contentOffset.y, 60.0f), 0, 0, 0); } } else { if (state == PullToRefreshViewStateReady) { [UIView beginAnimations:nil context:NULL]; [UIView setAnimationDuration:0.2f]; [self setState:PullToRefreshViewStateLoading]; [UIView commitAnimations]; if ([delegate respondsToSelector:@selector(pullToRefreshViewShouldRefresh:)]) [delegate pullToRefreshViewShouldRefresh:self]; } } } } - (void)finishedLoading { if (state == PullToRefreshViewStateLoading) { [UIView beginAnimations:nil context:NULL]; [UIView setAnimationDuration:0.3f]; [self setState:PullToRefreshViewStateNormal]; [UIView commitAnimations]; } } #pragma mark - #pragma mark Dealloc - (void)dealloc { [scrollView removeObserver:self forKeyPath:@"contentOffset"]; [arrowImage release]; [activityView release]; [statusLabel release]; [lastUpdatedLabel release]; [super dealloc]; } @end