ios - 将 curveEaseIn 添加到 Swift 动画

Question

我有一个旋转的图像，但它突然停止了。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。

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: 类型“() -> Void”没有成员“curveEaseOut”

我也尝试过这段代码，但也收到错误:

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

不知道我错过了什么。任何帮助将不胜感激!!

Answer 1

如果您想指定.curveEaseOut，您必须使用带有选项的UIView方法:

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