iOS7のウィンドウは、iOS8/9のウィンドウとは異なる動作をします。
iOS7のキーボードウィンドウとiOS8/9のすべてのウィンドウは、常に正しい向きとサイズになっています。したがって、サイズ変更イベントを監視し、ビューのフレームを更新できます。
ただし、iOS7の他のウィンドウは、常に縦向きとサイズを維持します。回転後にビューの変換を更新する必要があります。
UIApplicationWillChangeStatusBarOrientationNotificationをオブザーバーし、UIViewのサイズを次のように更新する必要があります。
@interface MyView : UIView
@end
@implementation MyView
- (instancetype)init
{
if (self = [super init]) {
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(changeOrientationHandler:) name:UIApplicationWillChangeStatusBarOrientationNotification object:nil];
}
return self;
}
- (void)dealloc
{
[[NSNotificationCenter defaultCenter] removeObserver:self name:UIApplicationWillChangeStatusBarOrientationNotification object:nil];
}
- (void)updateTransformWithOrientation:(UIInterfaceOrientation)orientation
{
CGFloat width = CGRectGetWidth(self.window.bounds);
CGFloat height = CGRectGetHeight(self.window.bounds);
if (width > height) {
CGFloat temp = width;
width = height;
height = temp;
}
CGFloat offset = (height - width) / 2;
CGAffineTransform transform;
switch (orientation) {
case UIInterfaceOrientationLandscapeLeft:
transform = CGAffineTransformMakeTranslation(-offset, offset);
transform = CGAffineTransformRotate(transform, -M_PI_2);
break;
case UIInterfaceOrientationLandscapeRight:
transform = CGAffineTransformMakeTranslation(-offset, offset);
transform = CGAffineTransformRotate(transform, M_PI_2);
break;
case UIInterfaceOrientationPortraitUpsideDown:
transform = CGAffineTransformMakeRotation(-M_PI);
break;
default:
transform = CGAffineTransformIdentity;
break;
}
self.transform = transform;
self.frame = CGRectMake(0, 0, width, height);
}
- (void)updateFrameWithOrientation:(UIInterfaceOrientation)orientation
{
CGFloat width = CGRectGetWidth(self.window.bounds);
CGFloat height = CGRectGetHeight(self.window.bounds);
if (width > height) {
CGFloat temp = width;
width = height;
height = temp;
}
switch (orientation) {
case UIInterfaceOrientationLandscapeLeft:
case UIInterfaceOrientationLandscapeRight:
self.frame = CGRectMake(0, 0, height, width);
break;
default:
self.frame = CGRectMake(0, 0, width, height);
break;
}
}
- (void)updateWithOrientation:(UIInterfaceOrientation)orientation
{
BOOL isIos7 = [[UIDevice currentDevice].systemVersion floatValue] < 8.0;
BOOL isKeyboardWindow = [self.window isKindOfClass:NSClassFromString(@"UITextEffectsWindow")];
if (isIos7 == YES && isKeyboardWindow == NO) {
[self updateTransformWithOrientation:orientation];
} else {
[self updateFrameWithOrientation:orientation];
}
}
- (void)changeOrientationHandler:(NSNotification *)notification
{
[UIView animateWithDuration:0.25 animations:^{
UIInterfaceOrientation orientation = (UIInterfaceOrientation)[notification.userInfo[UIApplicationStatusBarOrientationUserInfoKey] integerValue];
[self updateWithOrientation:orientation];
}];
}
@end