具有多个选项的快速动画UIView

Question

如何快速处理多个选项时，动画UIView？我试过了

UIView.animateWithDuration(0.2, delay: 0.0, options: .Repeat | .Autoreverse, animations: {self.alpha = 0.0}, completion: nil)

但似乎将|与按位运算符混淆在一起：

Undefined symbols for architecture i386:
 "__TFSsoi1oUSs17_RawOptionSetType_USs21BitwiseOperationsTypeSs9Equatable__FTQ_Q__Q_", referenced from:
      __TFC17TextDrawing10cursorViewW8blinkingSb in cursorView.o
ld: symbol(s) not found for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see invocation)

我正在使用来自AppStore的最新Xcode版本。

Answer 1

Swift 2

UIView.animateWithDuration(0.2, delay: 0.0, options: [.Repeat, .Autoreverse], animations: {self.alpha = 0.0}, completion: nil)

Swift 3，4，5

UIView.animate(withDuration: 0.2, delay: 0.0, options: [.repeat, .autoreverse], animations: {self.alpha = 0.0}, completion: nil)

Answer 2

预览答案不会在现在的快速工作。@mxcl给出了好的答案。

如果尽管您想使用此表单，但必须检索rawValue并使用包含或掩码重建一个新的UIViewAnimationOptions。

UIViewAnimationOptions(rawValue:(UIViewAnimationOptions.Autoreverse.rawvalue | UIViewAnimationOptions.Repeat.rawValue))

Answer 3

Swift 3:测试并确定：

UIView.animate(withDuration: 0.2, delay: 0.0, options: [.repeat, .autoreverse], animations: {
            }, completion: nil)