Swift3 UIView动画

Question

自从将我的项目升级到 swift 3 后，我的自动布局约束动画无法正常工作；更具体地说，它们是捕捉到新位置而不是动画。

UIView.animate(withDuration: 0.1,
               delay: 0.1,
               options: UIViewAnimationOptions.curveEaseIn,
               animations: { () -> Void in
                   constraint.constant = ButtonAnimationValues.YPosition.DefaultOut()
                   self.layoutIfNeeded()
    }, completion: { (finished) -> Void in
    // ....
})

我知道他们添加了 UIViewPropertyAnimator class 但我还没有尝试。

Answer 1

我在 swift 3 的最新更新中也遇到了这个问题。

确切地说，无论何时您想要为视图设置动画，实际上都是在该视图的父视图上调用 layoutIfNeeded。

试试这个：

UIView.animate(withDuration: 0.1,
           delay: 0.1,
           options: UIViewAnimationOptions.curveEaseIn,
           animations: { () -> Void in
               constraint.constant = ButtonAnimationValues.YPosition.DefaultOut()
               self.superview?.layoutIfNeeded()
}, completion: { (finished) -> Void in
// ....
})

在过去，他们似乎对能够重新布局您想要动画的视图一直很宽容。但是在文档中，您真的应该在超级视图中调用 layoutIfNeeded。

Answer 2

升级到 swift 3.0

像苹果默认的推送动画一样查看从右到左的动画

//intially set x = SCREEN_WIDTH
view.frame = CGRect(x: ScreenSize.SCREEN_WIDTH, y: ScreenSize.SCREEN_HEIGHT - heightTabBar , width: ScreenSize.SCREEN_WIDTH, height: heightTabBar)

UIView.animate(withDuration: 0.50, delay: 0.0, usingSpringWithDamping: 1.0, initialSpringVelocity: 0, options: [], animations: {
 //Set x position what ever you want
                        view.frame = CGRect(x: 0, y: ScreenSize.SCREEN_HEIGHT - heightTabBar , width: ScreenSize.SCREEN_WIDTH, height: heightTabBar)

                    }, completion: nil)

Answer 3

首先为您的约束设置新值，然后调用动画。

self.YOUR_CONSTRAINT.constant = NEW_VALUE
UIView.animate(withDuration: 1.0) {
    self.view.layoutIfNeeded()
}

Answer 4

Swift 3.1 , Xcode 8.3.2

这段代码对我来说效果很好。您视图中的任何更改都将以慢动作动画显示。

UIView.animate(withDuration: 3.0, animations: { // 3.0 are the seconds

// Write your code here for e.g. Increasing any Subviews height.

self.view.layoutIfNeeded()

})

Answer 5

Swift4，Xcode10

从右到左的搜索动画

//初始设置 x = Your_View_Width

    viewOfSearch.frame = CGRect(x: viewOfSearch.frame.size.width, y: 0 , width: viewOfSearch.frame.size.width, height: 50)

    UIView.animate(withDuration: 0.50, delay: 0.0, usingSpringWithDamping: 1.0, initialSpringVelocity: 0, options: [], animations: {
        //Set x position what ever you want
        self.viewOfSearch.frame = CGRect(x: 0, y: 0 , width: self.viewOfSearch.frame.size.width, height: 50)

    }, completion: nil)

Answer 6

func setView(view: UIView) {
        UIView.transition(with: view, duration: 1.0, options: .transitionFlipFromTop, animations: {
        })
    }

更改选项部分以在该特定 UIView 上应用新动画。

Swift3 UIView动画

Swift 3 UIView animation

uiview

uiviewanimation

ios

swift

swift3