iOS：如何在设备旋转后运行函数 (Swift)
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iOS: How to run a function after Device has Rotated (Swift)
提问by Richard
I have one UIView which is not using Auto-Layout and some components are displayed based on their percent of X and Y co-ordinates from the main view.
我有一个不使用自动布局的 UIView，一些组件是根据主视图中 X 和 Y 坐标的百分比显示的。
Previously I would have run a function to update their positions in didRotateFromInterfaceOrientation however I see this is now deprecated in iOS8.
以前我会运行一个函数来更新他们在 didRotateFromInterfaceOrientation 中的位置，但是我发现这在 iOS8 中现在已被弃用。
I've taken a look at viewWillTransitionToSize but it's giving weird results, and there doesn't appear to be a viewDidtransitionToSize function.
我查看了 viewWillTransitionToSize 但它给出了奇怪的结果，而且似乎没有 viewDidtransitionToSize 函数。
Is there an easy way (in Swift) to run a function after a device rotation?
有没有一种简单的方法（在 Swift 中）在设备旋转后运行一个函数？
回答by Acey
The viewWillTransitionToSizedelegate method gets called with a UIViewControllerTransitionCoordinatorconforming object. A method that protocol declares is animateAlongsideTransition(_:animation, completion:). You can use that to have code execute after the transition is complete.
该viewWillTransitionToSize委托方法被调用了UIViewControllerTransitionCoordinator符合对象。协议声明的方法是animateAlongsideTransition(_:animation, completion:). 您可以使用它在转换完成后执行代码。
override func viewWillTransitionToSize(size: CGSize, withTransitionCoordinator coordinator: UIViewControllerTransitionCoordinator) {
super.viewWillTransitionToSize(size, withTransitionCoordinator: coordinator)
coordinator.animateAlongsideTransition(nil, completion: {
_ in
// Your code here
})
}
回答by daxh
Above answer https://stackoverflow.com/a/26944087/6583492is absolutely right, thanks to Acey and Moonwalkr. But for swift 3.0 it will looks like the following
以上答案https://stackoverflow.com/a/26944087/6583492绝对正确，感谢 Acey 和 Moonwalkr。但是对于 swift 3.0，它将如下所示
override func viewWillTransition(to size: CGSize, with coordinator: UIViewControllerTransitionCoordinator) {
super.viewWillTransition(to: size, with: coordinator)
coordinator.animate(alongsideTransition: nil) { _ in
// Your code here
}
}
回答by Olivier de Jonge
Although not asked for here Objective C version:
虽然这里没有要求 Objective C 版本：
- (void)viewWillTransitionToSize:(CGSize)size withTransitionCoordinator:(id<UIViewControllerTransitionCoordinator>)coordinator {
[coordinator animateAlongsideTransition:^(id<UIViewControllerTransitionCoordinatorContext> _Nonnull context) {
// change any properties on your views
} completion:^(id<UIViewControllerTransitionCoordinatorContext> _Nonnull context) {
UIDeviceOrientation orientation = [UIDevice currentDevice].orientation;
if( UIDeviceOrientationIsPortrait(orientation) ) {
NSLog(@"portrait");
} else {
NSLog(@"landscape");
}
}];
}
