在Swift中，可以快速对UIView进行扩展来实现视图的动画效果
///扩展UIView动画效果
extension UIView {
//动画类型
enum AnimationType {
///旋转
case transform
///翻转
case flip
///透明度
case alpha
///升落
case updown
///拉伸
case tensile
/// 上、下
case up,down
}
///增加动画效果
func ex_animation(type: AnimationType) {
switch type {
case .transform:
let originalTransform = self.transform
UIView.animateWithDuration(1.5, animations: {
self.transform = CGAffineTransformMakeRotation(4.0)
}) { (finished) in
UIView.animateWithDuration(1.5, animations: {
self.transform = originalTransform
})
}
case .alpha:
UIView.animateWithDuration(2, animations: {
self.alpha = 0.3
}, completion: { (finished) in
self.alpha = 1
})
case .flip:
UIView.transitionWithView(self, duration: 2, options: UIViewAnimationOptions.TransitionFlipFromLeft, animations: {
}, completion: { (finished) in
UIView.transitionWithView(self, duration: 2, options: .TransitionFlipFromRight, animations: {
}, completion: nil)
})
case .updown:
let originalPoint = self.center
let point = CGPoint(x: self.center.x, y: self.center.y - 200)
UIView.animateWithDuration(0.3, animations: {
self.center = point
}, completion: { (finished) in
UIView.animateWithDuration(0.7, animations: {
self.center = originalPoint
})
})
case .tensile:
let originalBounds = self.bounds
let rect = CGRect(x: 0, y: 0, width: self.frame.width*3, height: self.frame.height*1.2)
UIView.animateWithDuration(1, animations: {
self.bounds = rect
}, completion: { (finished) in
UIView.animateWithDuration(1, animations: {
self.bounds = originalBounds
})
})
case .up:
//let originalPoint = self.center
let point = CGPoint(x: self.center.x, y: self.center.y - 200)
UIView.animateWithDuration(0.3, animations: {
self.center = point
}, completion: { (finished) in
UIView.animateWithDuration(0.7, animations: {
//self.center = originalPoint
self.alpha = 0
})
})
case .down:
//let originalPoint = self.center
let point = CGPoint(x: self.center.x, y: self.center.y + 200)
self.alpha = 0.5
UIView.animateWithDuration(0.2, animations: {
self.center = point
}, completion: { (finished) in
UIView.animateWithDuration(0.3, animations: {
// self.center = originalPoint
self.alpha = 1
})
})
}
}
}
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