如何让willAnimateRotationToInterfaceOrientation对所有可见视图有效？

[问答小助手]

原问题来自于CSDN问答频道，更多解决方案见：http://ask.csdn.net/questions/2108

问题描述：

在应用中有几个UIViewController。其中一个willAnimateRotationToInterfaceOrientation 事件调用成功了。

如何让willAnimateRotationToInterfaceOrientation对所以可见视图有效？

解决方案：

RootViewController中:

- (void)willAnimateRotationToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration {
    NSDictionary *userInfo = @{
        @"toInterfaceOrientation":@(toInterfaceOrientation),
        @"duration":@(duration)};
    [[NSNotificationCenter defaultCenter] postNotificationName:@"willAnimateRotationToInterfaceOrientation" object:nil userInfo:userInfo];
}

其他的 UIViewControllers:

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(willAnimateRotationToInterfaceOrientation:) name:@"willAnimateRotationToInterfaceOrientation" object:nil];
    }
    return self;
}

- (void)willAnimateRotationToInterfaceOrientation:(NSNotification *)notification {
    UIInterfaceOrientation toOrientation = (UIInterfaceOrientation)[notification.userInfo[@"toOrientation"] intValue];
    NSTimeInterval duration = (UIInterfaceOrientation)[notification.userInfo[@"duration"] floatValue];
    [self willAnimateRotationToInterfaceOrientation:toOrientation duration:duration];
}

- (void)willAnimateRotationToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation duration:(NSTimeInterval)duration {
    // ...
}

- (void)dealloc {
    [[NSNotificationCenter defaultCenter] removeObserver:self];
    [super dealloc];
}

[bangguox]

不会，帮顶下

[u010363242]

暗杀

[banxiepifa]

[何鑫紈]

[凛然。]

系统就有旋转通知的