将 curveEaseIn 添加到 Swift Animation [英] Adding curveEaseIn to Swift Animation

问题描述

我有一个旋转的图像，但它突然停止.我想添加curveEaseOut 以使其停止更平滑，但是当我添加动画:.curveEaseOut 时，出现错误.

I have an image that rotates but it stops abruptly. I'd like to add curveEaseOut to make it stop smoother, but when I add the animations: .curveEaseOut, I get an error.

func rotateRight () {
    let rotation = 90.0
    let transform = imageGearRight.transform
    let rotated = transform.rotated(by: CGFloat(rotation))
    UIView.animate(withDuration: 0.5, animations: .curveEaseOut) {
        self.imageGearRight.transform = rotated
    }
}

我不断收到错误消息:类型 '() -> Void' 没有成员 'curveEaseOut'

I keep getting an error: Type '() -> Void' has no member 'curveEaseOut'

我也试过这个代码，但我也得到一个错误:

I've also tried this code, but I get an error also:

    UIView.animate(withDuration: 0.5, animations: UIViewAnimationCurve.easeOut) {
        self.imageGearRight.transform = rotated
    }

不确定我错过了什么.任何帮助将不胜感激！

Not sure what I am missing. Any help would be appreciated!!

推荐答案

如果你想指定 .curveEaseOut 你必须使用一个带有选项的 UIView 方法:

If you want to specify .curveEaseOut you have to use a UIView method that takes options:

UIView.animate(withDuration: 0.5,
               delay: 0,
               options: [ .curveEaseOut ],
               animations: {
                   self.imageGearRight.transform = rotated
               },
               completion: nil)

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