如果UIViewController的父级处于纵向模式，如何以横向模式加载UIViewController？

Question

I want to load a ViewController in landscape mode from a portrait parent. Parent is got fixed for portrait, it wont change its orientation, however the child view controller whichever is got pushed from the parent also loading portrait initially irrespective of the device orientation (if we rotate the device few more times then the orientation set properly for childs). So how to load child properly in initial time itself.

or

Is there any way I can set the orientation programatically, so that I can use it in ViewWillAppear method. Thanx.

Answer 1

In your child UIViewController set these two methods:

- (BOOL)shouldAutorotate
{
    return NO;
}

- (NSUInteger)supportedInterfaceOrientations
{
    return UIInterfaceOrientationMaskLandscapeLeft;
}

In parent UIViewController do:

[self.navigationController presentViewController:controller animated:YES completion:nil];

instead of:

[self.navigationController pushViewController:controller animated:YES];

If you want to present navigation bar in child:

DetailViewController *controller = [self.storyboard instantiateViewControllerWithIdentifier:@"DetailViewController"];
controller.title = @"Child";

You'll have to subclass UINavigationController with the two methods mentioned above instead in the child view controller.

MyNavigationController *nav = [[MyNavigationController alloc] initWithRootViewController:controller];

[self.navigationController presentViewController:nav animated:YES completion:nil];

Answer 2

Try this sample Project...........

https://www.dropbox.com/s/lrsz4dpeolpeu23/RotationDmeo.zip

Answer 3

If i got it right, you just add this methods to your child view controller

- (BOOL)shouldAutorotate {
    return NO;
}

- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation {
    return UIInterfaceOrientationLandscapeLeft / Right;
}

To present your view use

[self presentViewController:viewController...]

And your view is presented in Landscape mode.

Answer 4

Use this in view did appear or will appear,

[[UIDevice currentDevice]performSelector:@selector(setOrientation:) withObject:(__bridge id)((void *)UIInterfaceOrientationLandscapeRight)];

Before that Enable all 4 orientations in your .plist

Add this on AppDelegate.m

- (NSUInteger)application:(UIApplication*)application
supportedInterfaceOrientationsForWindow:(UIWindow*)window
{
    UIViewController *cont=self.vc;

    if([cont isKindOfClass:[YourClass class]])
    {
         NSUInteger orientations =  UIInterfaceOrientationMaskLandscapeRight;

        NSLog(@"Landscape");

        return orientations;
   }

    NSUInteger orientations = UIInterfaceOrientationMaskPortrait;

    return orientations;
}