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122 lines
3.4 KiB
Swift
Executable file
122 lines
3.4 KiB
Swift
Executable file
//
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// SAConfettiView.swift
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// Pods
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//
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// Created by Sudeep Agarwal on 12/14/15.
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//
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//
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import UIKit
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import QuartzCore
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public class SAConfettiView: UIView, CAAnimationDelegate {
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public enum ConfettiType {
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case Confetti
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case Triangle
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case Star
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case Diamond
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case Image(UIImage)
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}
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var emitter: CAEmitterLayer!
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public var colors: [UIColor]!
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public var intensity: Float!
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public var type: ConfettiType!
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required public init?(coder aDecoder: NSCoder) {
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super.init(coder: aDecoder)
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setup()
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}
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public override init(frame: CGRect) {
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super.init(frame: frame)
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setup()
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}
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func setup() {
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colors = [UIColor(red:0.95, green:0.40, blue:0.27, alpha:1.0),
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UIColor(red:1.00, green:0.78, blue:0.36, alpha:1.0),
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UIColor(red:0.48, green:0.78, blue:0.64, alpha:1.0),
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UIColor(red:0.30, green:0.76, blue:0.85, alpha:1.0),
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UIColor(red:0.58, green:0.39, blue:0.55, alpha:1.0)]
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intensity = 0.5
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type = .Confetti
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}
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@objc public func startConfetti() -> Void {
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emitter = CAEmitterLayer()
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emitter.emitterPosition = CGPoint(x: self.center.x, y: 0)
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emitter.emitterShape = CAEmitterLayerEmitterShape.line
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emitter.emitterSize = CGSize(width: 40.0, height: 1)
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var cells = [CAEmitterCell]()
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for color in colors {
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cells.append(confettiWithColor(color: color))
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}
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emitter.emitterCells = cells
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layer.addSublayer(emitter)
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let animation = CAKeyframeAnimation(keyPath: "birthRate")
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animation.duration = 1
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animation.keyTimes = [0.5, 2.0]
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animation.values = [2.0, 0.0]
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animation.repeatCount = MAXFLOAT
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animation.delegate = self
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emitter.add(animation, forKey: "confettis")
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}
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override public func layoutSubviews() {
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super.layoutSubviews()
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emitter.emitterPosition = CGPoint(x: self.center.x, y: 0)
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}
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@objc public func stopConfetti() {
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emitter?.birthRate = 0
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}
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func imageForType(type: ConfettiType) -> UIImage? {
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var fileName: String!
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switch type {
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case .Confetti:
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fileName = "confetti"
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case .Triangle:
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fileName = "triangle"
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case .Star:
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fileName = "star"
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case .Diamond:
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fileName = "diamond"
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case let .Image(customImage):
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return customImage
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}
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return UIImage(imageLiteralResourceName: fileName)
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}
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func confettiWithColor(color: UIColor) -> CAEmitterCell {
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let confetti = CAEmitterCell()
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confetti.birthRate = 6.0 * intensity
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confetti.lifetime = 14.0 * intensity
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confetti.lifetimeRange = 0
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confetti.color = color.cgColor
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confetti.velocity = CGFloat(350.0 * intensity)
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confetti.velocityRange = CGFloat(80.0 * intensity)
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confetti.emissionLongitude = CGFloat(Double.pi)
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confetti.emissionRange = CGFloat(Double.pi / 4.0)
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confetti.spin = CGFloat(3.5 * intensity)
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confetti.spinRange = CGFloat(4.0 * intensity)
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confetti.scaleRange = CGFloat(intensity)
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confetti.scaleSpeed = CGFloat(-0.1 * intensity)
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confetti.contents = imageForType(type: type)!.cgImage
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return confetti
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}
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}
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