ios - Swift 动画重复次数

Question

我有以下代码想要淡入和淡出 UILabel。但我只想让它重复淡入淡出 5 次。我的问题是如何设置动画只重复 3 次？

func savingIcon(){
    Loading.hidden=false
    UIView.animateWithDuration(1.0,
                               delay: 0.0,
                               options: [ .CurveEaseInOut],
                               animations: {

                                self.Loading.alpha=0.0;
                                self.Loading.alpha=1.0;
                                self.Loading.alpha=0.0;
                                self.Loading.alpha=1.0;
                                self.Loading.alpha=0.0;

        },
                               completion: { finished in
                                print("Save done")

                                self.Loading.hidden=true


    })

}

Answer 1

如果你想重复你的动画 block 5 次，尝试这样做:

UIView.animateWithDuration(1.0,
                           delay: 0.5,
                           options: [ .CurveEaseInOut, .Repeat],
                           animations: {

UIView.setAnimationRepeatCount(5)

                            self.Loading.alpha=0.0;
                            self.Loading.alpha=1.0;
                            self.Loading.alpha=0.0;
                            self.Loading.alpha=1.0;
                            self.Loading.alpha=0.0;

    },
                           completion: { finished in
                            print("Save done")

                            self.Loading.hidden=true


})