viewWillTransitionToSizeiOS 8에 도입 된 새로운 방법 을 구현하려고합니다 (다른 모든 회전 방법은 더 이상 사용되지 않습니다). didRotateFromInterfaceOrientation수행해야하는 정리 작업이 많고 UIViewControllerTransitionCoordinator새 항목으로 ‘전환’할 때 호출 할 수있는 블록을 볼 수 없으므로 해당 항목이 무엇인지 알고 싶습니다. 크기 마무리. 감사.
답변
알았어 animateAlongsideTransition:completion:, 전달 된 메소드 를 사용해야합니다 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];
}답변
이상한 답변의 스위프트 버전
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)
}답변
iOS 10.3 및 스위프트 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)
}답변
스위프트 3 에서 허용되는 답변 :
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)
}그것은 나를 위해 잘 작동합니다 👍
답변
문제는 다음과 같습니다. didRotateFromInterfaceOrientation
아래 코드를 작성한다고 생각했습니다.
@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");
}
}
@end시뮬레이터에서 iPhone을 테스트했지만 traitsCollection이 변경되지 않기 때문에 iPad를 사용하여 테스트하면 인쇄 명령문이 실행되지 않습니다.
- (void) traitCollectionDidChange: (UITraitCollection *) previousTraitCollection {
[super traitCollectionDidChange: previousTraitCollection];
if ((self.traitCollection.verticalSizeClass != previousTraitCollection.verticalSizeClass)
|| self.traitCollection.horizontalSizeClass != previousTraitCollection.horizontalSizeClass)) {
// your custom implementation here
}
}답변
[[UIApplication sharedApplication] statusBarOrientation]iOS9에서는 더 이상 사용되지 않으며 다양한 장치의 UITraitCollection 에 대해 테스트해야 합니다.
override func willTransitionToTraitCollection(newCollection: UITraitCollection, withTransitionCoordinator coordinator: UIViewControllerTransitionCoordinator) {
if newCollection.containsTraitsInCollection(UITraitCollection(verticalSizeClass: .Regular)) {
...
}
}답변
Ipad에는 특성 수집 변경이 없으므로 시작 및 완료에서 회전을 감지하는 방법은 다음과 같습니다. Swift 5 구문은 다음과 같습니다.
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")
}
}