View Controllers in view Controller and orientation iOS

Question

I have iPAD app which has UIViewController A as root view Controller of Navigation Controller. Now i have 3 more View Controllers B,C, D as subview of ViewController A.

I want B not to respond orientation while C and D should respond to it.

Currently with code all of them respond to orientation change.

There was another answer which says make two separate root ViewControllers and add them into windows View. One of them non rotating and other rotating. I cant do that because i have header in ViewController A which switches B,C,D to make them front viewController.

Anyway please suggest.

Thanks

Counterproductive

Answer 1

You need to subclass the UINavigationController like this.

.H

#import <UIKit/UIKit.h>

@interface UINavigationController (Rotation)

- (BOOL)shouldAutorotate;
- (NSUInteger)supportedInterfaceOrientations;

@end

.M

#import "UINavigationController+Rotation.h"

@implementation UINavigationController (Rotation)

- (BOOL)shouldAutorotate {
    return YES;
}

- (NSUInteger)supportedInterfaceOrientations {
    if ([self visibleViewController] && [[self visibleViewController] isKindOfClass:[B class]]) {
        return UIInterfaceOrientationMaskAll;
    }
    return UIInterfaceOrientationMaskPortrait;
}

@end

Kimi

Is it category mate? what is (Rotation) here? – Counterproductive

How can i use it mate – Counterproductive

Yes, it is a category on uinavigationcontroller. – Kimi

New File -> Objective-C category -> Category on :UINavigationController and name:Rotation. – Kimi

It never execute first condition in supportedInterfaceOrientations . – Counterproductive

If try to log it NSLog(@"%@", NSStringFromClass(self.visibleViewController.class)); it always show ViewController – Counterproductive

Are you using UINavigationController's pushViewController to open these views or just adding by addSubview comment? If you're not pushing them, there is no easy way to rotate. You need to describe a rotation change listener and transform your view to desired orientation. – Kimi

Answer 2

You can create subclass from UINavigationController or make category for it. And implement this methods:

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

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

- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
    return [self.topViewController preferredInterfaceOrientationForPresentation]; 
}

And then, in your controllers you should implement this methods with orientations which you want.

Waits

It never call topViewController's delegate methods – Counterproductive