Force portrait orientation while pushing from landscape View Controller

问题

App Support: iOS6+

My app works in both portrait and landscape. But 1 controller should only works in a Portrait.

The problem is that when I am in landscape and push the view controller the new viewcontroller is in landscape as well until I rotate it to portrait. Then it's stuck in portrait as it should be.

Is it possible to always make it appear in portrait? Even if its parent is pushing it in landscape?

All the following code doesn't help

[[UIApplication sharedApplication] setStatusBarOrientation:UIInterfaceOrientationPortrait];

And this code works until and unless i am not pushing from landscape How to force a UIViewController to Portrait orientation in iOS 6

回答1:

I solved this by adding following lines in ViewDidLoad

UIViewController *c = [[UIViewController alloc]init];
[self presentViewController:c animated:NO completion:nil];
[self dismissViewControllerAnimated:NO completion:nil];

回答2:

First, you need to create a category:

UINavigationController+Rotation_IOS6.h

#import <UIKit/UIKit.h>

@interface UINavigationController (Rotation_IOS6)

@end

UINavigationController+Rotation_IOS6.m:

#import "UINavigationController+Rotation_IOS6.h"

@implementation UINavigationController (Rotation_IOS6)

-(BOOL)shouldAutorotate
{
    return [[self.viewControllers lastObject] shouldAutorotate];
}

-(NSUInteger)supportedInterfaceOrientations
{
    return [[self.viewControllers lastObject] supportedInterfaceOrientations];
}

@end

Then, you implement these methods in your class that you want to be only landscape:

- (BOOL)shouldAutorotate
{
    return YES;
}

- (NSUInteger)supportedInterfaceOrientations
{
    return UIInterfaceOrientationMaskLandscape;
}

In case you're using a UITabBarController, just replace the UINavigationController for UITabBarController. This solution worked nice for me after a long search! I was in the same situation as you are now!

EDIT

So, I saw your sample. You need to make some changes. 1 - Create a new class for the UINavigationController category. Name the class UINavigationController+Rotation_IOS6 (.h and .m) 2 - You don't need to implement the method preferredInterfaceOrientationForPresentation. Your category should look like this:

#import "UINavigationController+Rotation_IOS6.h"

@implementation UINavigationController (Rotation_IOS6)

-(BOOL)shouldAutorotate
{
    return [[self.viewControllers lastObject] shouldAutorotate];
}

-(NSUInteger)supportedInterfaceOrientations
{
    return [[self.viewControllers lastObject] supportedInterfaceOrientations];
}

@end

3 - In the class you want to rotate only in landscape, include this in the implementation, exactly like this:

// Rotation methods for iOS 6
- (BOOL)shouldAutorotate
{
    return YES;
}

- (NSUInteger)supportedInterfaceOrientations
{
    return UIInterfaceOrientationMaskLandscape;
}

4 - I would advice to also include the method for autorotation for iOS 5 inside the class you want in landscape:

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

来源：https://stackoverflow.com/questions/14633213/force-portrait-orientation-while-pushing-from-landscape-view-controller

标签

iphone

objective-c

orientation

landscape

portrait