ios - 警报框上的动画

Question

我有一个警告框，想在它“出现”时应用下面的动画:

Scale From 0.94 to 1.0
Opacity From 0 to 1
Time 0.50ms
x1: 0.48, y1: 0.44, x2: 0.01, y2: 1.2

有人可以指导如何快速实现这一目标吗？

代码:

self.view.alpha = 0    
UIView.animateWithDuration(0.05,
                animations: { () -> Void in
                    self.view.alpha = 1.0
                },

谢谢。

Answer 1

self.view.frame.origin = CGPoint(x: 0.48, y: 0.44)
self.view.layer.transform = CATransform3DMakeScale(0.94, 0.94, 1)
self.view.alpha = 0




 UIView.animateWithDuration(0.05,
            animations: { () -> Void in
                  self.view.layer.transform = CGAffineTransformIdentity
                  self.view.alpha = 1.0
                  self.view.frame.origin =  CGPoint(x: 0.01, y: 1.2)
                  self.view.layoutIfNeeded()
            })