CODEWITHSUNDEEP
iphoneobjective-cios
uttam
uttam

Reputation: 1364

How to change the orientation of the app without changing the device orientation in iphone app

I want to change the orientation of the app without changing the device orientation in iphone app. I want to change my view from portraid mode to landscap mode programmatically.

And also want to know that will this be accepted by the apple store or not ?

Thanks

Now I got the solution from other that is as follow

[[UIDevice currentDevice] setOrientation:UIInterfaceOrientationLandscapeRight];

when you add this line at that time one warning appear and for remove this warning just add bellow code on you implementation file..

@interface UIDevice (MyPrivateNameThatAppleWouldNeverUseGoesHere)


    - (void) setOrientation:(UIInterfaceOrientation)orientation;


    @end

and after that in bellow method just write this code if required..

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation

    {

        return (interfaceOrientation == UIInterfaceOrientationLandscapeRight);

    }

But now want to know is this accepted by apple app store or not ?

thanks

Upvotes: 1

Views: 5393

Answers (5)

IronManGill
IronManGill

Reputation: 7226

The documentation describes the orientation property as being read-only, so if it works, I'm not sure you can rely on it working in the future (unless Apple does the smart thing and changes this; forcing orientation changes, regardless of how the user is currently holding their device, is such an obvious functional need).

As an alternative, the following code inserted in viewDidLoad will successfully (and somewhat curiously) force orientation (assuming you've already modified you shouldAutorotateToInterfaceOrientation ):

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

Clearly, this does it if the user is currently holding their device in portrait orientation (and thus presumably your shouldAutorotateToInterfaceOrientation is set up for landscape only and this routine will shift it to landscape if the user's holding their device in portrait mode). You'd simply swap the UIDeviceOrientationIsPortrait with UIDeviceOrientationIsLandscape if your shouldAutorotateToInterfaceOirentation is set up for portrait only.

For some reason, removing the view from the main window and then re-adding it forces it to query shouldAutorotateToInterfaceOrientation and set the orientation correctly. Given that this isn't an Apple approved approach, maybe one should refrain from using it, but it works for me. Your mileage may vary. But this also refers to other techniques, too. Check SO discussion

Upvotes: 0

kunalg
kunalg

Reputation: 1580

To change Orientation portraid mode to landscap mode use this code 

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

use this code for programmatically change orientation...

[[UIDevice currentDevice] setOrientation:UIInterfaceOrientationLandscapeRight];

Upvotes: 1

AppleDelegate
AppleDelegate

Reputation: 4249

If you want to change the particular view only in landscape..then u can try the following in its viewDidLoad

    float   angle = M_PI / 2; 
    CGAffineTransform transform = CGAffineTransformMakeRotation(angle);
   [ [self.view] setTransform:transform];

Upvotes: 0

Rashid
Rashid

Reputation: 847

Add a class variable 

Bool isInLandsCapeOrientation;

in viewDidLoad

set this flag to

isInLandsCapeOrientation = false;

Add the following function

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
     if (!isInLandsCapeOrientation) {
         return (UIInterfaceOrientationIsPortrait(interfaceOrientation));

     }else {
         return  (UIInterfaceOrientationIsLandscape(interfaceOrientation));
     }
}

To changing orientation from portrait to landscape, let it happens on a button action

 - (IBAction)changeOrientationButtonPressed:(UIButton *)sender
{
    isInLandsCapeOrientation = true;
    UIViewController *viewController = [[UIViewController alloc] init];
    [self presentModalViewController:viewController animated:NO];
    [self dismissModalViewControllerAnimated:NO];
}

This works fine for me.

Upvotes: 3

Paras Joshi
Paras Joshi

Reputation: 20551

use this line for programmatically change orientation...

[[UIDevice currentDevice] setOrientation:UIInterfaceOrientationLandscapeRight];

and also when you add this line at that time one warning appear and for remove this warning just add bellow code on you implementation file..

@interface UIDevice (MyPrivateNameThatAppleWouldNeverUseGoesHere)
- (void) setOrientation:(UIInterfaceOrientation)orientation;
@end

and after that in bellow method just write this code if required..

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    // Return YES for supported orientations
    //    return NO;
    return (interfaceOrientation == UIInterfaceOrientationLandscapeRight);
}

i hope this help you..

:)

Upvotes: 5

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