viewWillTransitionToSize（所有其他旋转方法均已弃用）。我想知道didRotateFromInterfaceOrientation现在对应的是什么，因为我们需要执行一些清理任务，而我无法找到可以分配给UIViewControllerTransitionCoordinator的块，以便在“过渡”到新大小完成时调用它们。谢谢。好的，找到了，只需要在传递的 UIViewControllerTransitionCoordinator 上使用 animateAlongsideTransition:completion: 方法。
- (void)viewWillTransitionToSize:(CGSize)size withTransitionCoordinator:(id<UIViewControllerTransitionCoordinator>)coordinator
{
[coordinator animateAlongsideTransition:^(id<UIViewControllerTransitionCoordinatorContext> context)
{
UIInterfaceOrientation orientation = [[UIApplication sharedApplication] statusBarOrientation];
// do whatever
} completion:^(id<UIViewControllerTransitionCoordinatorContext> context)
{
}];
[super viewWillTransitionToSize:size withTransitionCoordinator:coordinator];
}
strange 的回答的 Swift 版本
override func viewWillTransitionToSize(size: CGSize, withTransitionCoordinator coordinator: UIViewControllerTransitionCoordinator) {
coordinator.animateAlongsideTransition({ (UIViewControllerTransitionCoordinatorContext) -> Void in
let orient = UIApplication.sharedApplication().statusBarOrientation
switch orient {
case .Portrait:
println("Portrait")
// Do something
default:
println("Anything But Portrait")
// Do something else
}
}, completion: { (UIViewControllerTransitionCoordinatorContext) -> Void in
println("rotation completed")
})
super.viewWillTransitionToSize(size, withTransitionCoordinator: coordinator)
}
iOS 10.3 和 Swift 3
override func willTransition(to newCollection: UITraitCollection, with coordinator: UIViewControllerTransitionCoordinator) {
coordinator.animate(alongsideTransition: { (_) in
let orient = newCollection.verticalSizeClass
switch orient {
case .compact:
print("Lanscape")///Excluding iPads!!!
default:
print("Portrait")
}
}, completion: { _ in
print("rotation completed")
})
super.willTransition(to: newCollection, with: coordinator)
}
在Swift 3中，被接受的答案是：
override func willTransition(to newCollection: UITraitCollection, with coordinator: UIViewControllerTransitionCoordinator) {
coordinator.animate(alongsideTransition: { (_) in
let orient = UIApplication.shared.statusBarOrientation
switch orient {
case .portrait:
print("Portrait")
// Do something
default:
print("Anything But Portrait")
// Do something else
}
}, completion: { (UIViewControllerTransitionCoordinatorContext) -> Void in
print("rotation completed")
})
super.willTransition(to: newCollection, with: coordinator)
}
对我来说，它运行得很好。
switch orient {
case .compact:
print("横屏")
// 做一些事情
default:
print("竖屏")
// 做其他事情
}` - Mike Glukhov既然问题是：等同于didRotateFromInterfaceOrientation的方法，那我就提供下面的代码：
@implementation ViewController
- (void)traitCollectionDidChange:(UITraitCollection *)previousTraitCollection {
[super traitCollectionDidChange:previousTraitCollection];
if (previousTraitCollection.verticalSizeClass == UIUserInterfaceSizeClassRegular) {
NSLog(@"User has rotated to landscape");
} else if (previousTraitCollection.verticalSizeClass == UIUserInterfaceSizeClassCompact) {
NSLog(@"User has rotated to portrait");
}
}
@end
我在模拟器上测试了iPhone，但是如果我使用iPad进行测试，我的打印语句将不会被运行，因为traitsCollection不会改变。
这很奇怪，因为这正是苹果推荐的做法：
- (void) traitCollectionDidChange: (UITraitCollection *) previousTraitCollection {
[super traitCollectionDidChange: previousTraitCollection];
if ((self.traitCollection.verticalSizeClass != previousTraitCollection.verticalSizeClass)
|| self.traitCollection.horizontalSizeClass != previousTraitCollection.horizontalSizeClass)) {
// your custom implementation here
}
}
[[UIApplication sharedApplication] statusBarOrientation]在iOS9中已经被弃用，你需要针对不同的设备测试UITraitCollection。
override func willTransitionToTraitCollection(newCollection: UITraitCollection, withTransitionCoordinator coordinator: UIViewControllerTransitionCoordinator) {
if newCollection.containsTraitsInCollection(UITraitCollection(verticalSizeClass: .Regular)) {
...
}
}
override func viewWillTransition(to size: CGSize, with coordinator:
UIViewControllerTransitionCoordinator) {
super.viewWillTransition(to: size, with: coordinator)
coordinator.animate(alongsideTransition: { [unowned self] _ in
self.view.backgroundColor = UIColor.blue
print("rotation in progress")
}) { [unowned self] _ in
self.view.backgroundColor = UIColor.green
print("rotation complete")
}
}
UIInterfaceOrientation orientation = [[UIApplication sharedApplication] statusBarOrientation]; // 做你想做的事} completion:^(id<UIViewControllerTransitionCoordinatorContext> context) { }]; [super viewWillTransitionToSize: size withTransitionCoordinator: coordinator];}` - strange[UIDevice currentDevice].orientation。你还可以将其输入到UIDeviceOrientationIsPortrait([UIDevice currentDevice].orientation)或UIDeviceOrientationIsLandscape([UIDevice currentDevice].orientation)中。希望这能帮助到你！ - Jeff