强制旋转 UIViewController

问题描述

So, I've given up on trying to solve an issue I've been having where my controller will rotate without calling my shouldAutorotateToInterfaceOrientation: method, because everyone for a few years has been stating it as an iOS bug.

Now I need to just force rotate my UIViewController. Is there a way I can do that, since the UIDevice instance method has been removed now and I don't know what to do to force rotate my controller.

I'm not sure which UIDevice method that you are saying has been removed, but the following has worked for me (this does use the UIDevice orientation method). Bottom line, if you have a view that only accepts landscape, you can use the following to force iOS to change the orientation. It's curious, but it works. I apologize that I can't give credit to the original author, but once came across this elsewhere on StackOverflow:

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    return (interfaceOrientation == UIInterfaceOrientationLandscapeLeft || interfaceOrientation == UIInterfaceOrientationLandscapeRight);
}

- (void)forceLandscape
{
    // make sure shouldAutorotateToInterfaceOrientation is configured to accept only landscape

    if (UIDeviceOrientationIsPortrait([[UIDevice currentDevice] orientation]))
    {
        UIWindow *window = [[UIApplication sharedApplication] keyWindow];
        UIView *view = [window.subviews objectAtIndex:0];
        [view removeFromSuperview];
        [window addSubview:view];
    }
}

The equivalent to force portrait mode (assuming, of course, your shouldAutorotateToInterfaceOrientation accepts only portrait):

- (void)forcePortrait
{
    // make sure shouldAutorotateToInterfaceOrientation is configured to accept only portrait

    if (UIDeviceOrientationIsLandscape([[UIDevice currentDevice] orientation]))
    {
        UIWindow *window = [[UIApplication sharedApplication] keyWindow];
        UIView *view = [window.subviews objectAtIndex:0];
        [view removeFromSuperview];
        [window addSubview:view];
    }
}

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