ios 不推荐使用旋转方法，相当于“didRotateFromInterfaceOrientation”？
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Rotation methods deprecated, equivalent of 'didRotateFromInterfaceOrientation'?
提问by strange
I'm trying to implement the new viewWillTransitionToSizemethod which has been introduced in iOS 8 (all other rotation methods have been deprecated). I'd like to know what the equivalent of didRotateFromInterfaceOrientationis now as there are a number of clean up tasks we need to perform and I can't see a block that we can assign to UIViewControllerTransitionCoordinatorin order to be called when 'transition' to a new size finishes. Thanks.
我正在尝试实现viewWillTransitionToSizeiOS 8 中引入的新方法（所有其他旋转方法已被弃用）。我想知道现在的等价物didRotateFromInterfaceOrientation是什么，因为我们需要执行许多清理任务，而且我看不到我们可以分配给的块，UIViewControllerTransitionCoordinator以便在“转换”到新的尺寸完成。谢谢。
回答by strange
Okay found it, just have to use the animateAlongsideTransition:completion:method on the passed UIViewControllerTransitionCoordinator.
好的找到了，只需要animateAlongsideTransition:completion:在传递的UIViewControllerTransitionCoordinator.
- (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];
}
回答by DogCoffee
The Swift Version of the answer by strange
奇怪的答案的 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)
}
回答by Mike Glukhov
iOS 10.3 & Swift 3
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)
}
回答by j_gonfer
The accepted answer in Swift 3:
Swift 3 中接受的答案：
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)
}
It works fine for me
这对我来说可以
回答by NYC Tech Engineer
Since the question was: what was the equivalent of didRotateFromInterfaceOrientation
因为问题是：什么是等价物 didRotateFromInterfaceOrientation
I thought I'd contribute the code below:
我想我会贡献下面的代码：
@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
I was testing on an iPhone in the simulator, but my print statements won't get run if I test using the iPad since the traitsCollection won't change.
我正在模拟器中的 iPhone 上进行测试，但是如果我使用 iPad 进行测试，我的打印语句将不会运行，因为 traitsCollection 不会改变。
This is strange because this is exactly what Apple recommends:
这很奇怪，因为这正是 Apple推荐的：
- (void) traitCollectionDidChange: (UITraitCollection *) previousTraitCollection {
[super traitCollectionDidChange: previousTraitCollection];
if ((self.traitCollection.verticalSizeClass != previousTraitCollection.verticalSizeClass)
|| self.traitCollection.horizontalSizeClass != previousTraitCollection.horizontalSizeClass)) {
// your custom implementation here
}
}
回答by Yannick
[[UIApplication sharedApplication] statusBarOrientation]is deprecated in iOS9 you have to test against UITraitCollectionfor various devices.
[[UIApplication sharedApplication] statusBarOrientation]在 iOS9 中已弃用，您必须针对各种设备的UITraitCollection进行测试。
override func willTransitionToTraitCollection(newCollection: UITraitCollection, withTransitionCoordinator coordinator: UIViewControllerTransitionCoordinator) {
if newCollection.containsTraitsInCollection(UITraitCollection(verticalSizeClass: .Regular)) {
...
}
}
回答by Avi Pogrow
On the Ipad there is no trait collection change so here is how you detect the rotation from start and completion. Here is the Swift 5 syntax:
在 Ipad 上没有特征集合的变化，所以这里是你如何从开始和完成检测旋转。这是 Swift 5 语法：
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")
}
}
