解雇子项后，父UIViewController方向不应更改 [英] Parent UIViewController Orientation Shouldn't Change After Dismissing the Child

问题描述

假设我有三个UI控制器（A，B，C）。

Lets say I have three UI Controllers (A,B,C).

A是我的根控制器，在ShouldAutoRotate方法中我返回YES。
我做的是从A到B的ModalView（B =>在ShouldAutoRotate方法中我返回Portrait）然后从BI执行presentModal到C（C应该能够旋转到任何方向）。

A is my root controller and inside the ShouldAutoRotate method I return YES. I do presentModalView from A to B (B=>inside the ShouldAutoRotate method I return Portrait) then from B I do presentModal to C (C should be able to rotate to any orientation).

现在在C里面我能够将模拟器旋转到任何方向，整个视图完全旋转。这就是问题，当C是Landscape并且我解雇它时，B里面的所有对象都会变成弄乱！！同样的事情发生在A。

Now inside C I'm able to rotate the simulator to any orientation, and the whole View rotates perfectly.Here is the problem, when C is Landscape and I dismiss it, all the objects inside B will become messed up!! same thing happens to A.

我只需要在C上进行轮换!!

I just need to have the rotation on C!!

感恩。

推荐答案

在App代理中

@interface AppDelegate : UIResponder <UIApplicationDelegate>
@property (nonatomic) BOOL shouldRotate;
@end

- (NSUInteger)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window{
    if (self.shouldRotate == YES) {
        return UIInterfaceOrientationMaskLandscapeLeft | UIInterfaceOrientationMaskLandscapeRight | UIInterfaceOrientationMaskPortrait;
    }
    return UIInterfaceOrientationMaskPortrait;
}

在viewController A中，B

In viewController A,B

- (void)viewWillAppear:(BOOL)animated{
    [super viewWillAppear:animated];
    ((AppDelegate *)[[UIApplication sharedApplication] delegate]).shouldRotate = NO;
    [self supportedInterfaceOrientations];

    [self shouldAutorotate:UIInterfaceOrientationPortrait];

    [[UIApplication sharedApplication] setStatusBarOrientation:UIInterfaceOrientationPortrait animated:NO];
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
    // Return YES for supported orientations
    return (interfaceOrientation == UIInterfaceOrientationPortrait);
}

- (BOOL)shouldAutorotate:(UIInterfaceOrientation)interfaceOrientation{
    // Return YES for supported orientations
    return (interfaceOrientation == UIInterfaceOrientationPortrait);
}

-(NSUInteger)supportedInterfaceOrientations{
    return UIInterfaceOrientationMaskPortrait;
}

在viewController C中

In viewController C

- (void)viewWillAppear:(BOOL)animated{
    [super viewWillAppear:animated];
    ((AppDelegate *)[[UIApplication sharedApplication] delegate]).shouldRotate = YES;

}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
    return YES;
}

- (BOOL)shouldAutorotate:(UIInterfaceOrientation)interfaceOrientation{
    return YES;

}

-(NSUInteger)supportedInterfaceOrientations{
    return UIInterfaceOrientationMaskPortrait|UIInterfaceOrientationMaskLandscapeLeft | UIInterfaceOrientationMaskLandscapeRight;
}

- (IBAction)closeVC:(id)sender {
    NSNumber *value = [NSNumber numberWithInt:UIInterfaceOrientationPortrait];
    [[UIDevice currentDevice] setValue:value forKey:@"orientation"];
    AppDelegate *appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
    appDelegate.shouldRotate = NO;

    [self supportedInterfaceOrientations];

    [self shouldAutorotate:UIInterfaceOrientationPortrait];

    [self dismissViewControllerAnimated:YES completion:nil];
}

希望这能解决您的问题

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