programmatically setting orientation in viewdidloa

问题:

I have created an app for ipad in which the homescreen should be displayed only in portrait mode. So i have used the below code in viewdidload.

[[UIDevice currentDevice] setOrientation:UIDeviceOrientationPortrait];

but it is not working. I am using ios 7 with xcode 5. If i open my app from landscape mode it shouuld automatically turn to portrait mode. but i am getting like this:

but it should be like this:

can any one help me to solve this issue. Thanks in advance.

回答1:

[[UIDevice currentDevice] setOrientation:UIDeviceOrientationPortrait];

This method is deprecated. You cannot use this method anymore.

https://stackoverflow.com/a/12813644/1405008

Above link gives detail on how to provide portrait only mode for UIViewController.

If you pushed into NavigationViewController then try this.

https://stackoverflow.com/a/16152506/1405008

回答2:

Following code is about to transform a navigationController view from Portrait to Landscape programmatically:

[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:0.3];
self.navigationController.view.transform = CGAffineTransformIdentity;
self.navigationController.view.transform = CGAffineTransformMakeRotation(M_PI*(90)/180.0);
self.navigationController.view.bounds = CGRectMake(0, 0, [UIScreen mainScreen].bounds.size.height, [UIScreen mainScreen].bounds.size.width);
[UIView commitAnimations];

self.view.frame = self.view.frame; //This is necessary
self.wantsFullScreenLayout = YES; 
[[UIApplication sharedApplication] setStatusBarOrientation:UIInterfaceOrientationLandscapeRight animated:NO];

- (BOOL) shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation {
    return (toInterfaceOrientation == UIInterfaceOrientationLandscapeRight);
}

- (NSUInteger)supportedInterfaceOrientations {
    return UIInterfaceOrientationMaskLandscapeRight;
}

Just hope to provide you some other ideas.

回答3:

copy this code in your viewdidload

UIInterfaceOrientation orientation = (UIInterfaceOrientation)[[UIDevice currentDevice] orientation];

if(orientation == UIInterfaceOrientationPortrait)
{
    isLandscapeMode = NO;
    inLandscapeRight = NO;
    inLandscapeLeft = NO;
}
else if(orientation == UIInterfaceOrientationLandscapeRight)
{
    isLandscapeMode = YES;
    inLandscapeRight = YES;
    inLandscapeLeft = NO;

} else if(orientation == UIInterfaceOrientationLandscapeLeft)
{
    isLandscapeMode = YES;
    inLandscapeRight = NO;
    inLandscapeLeft = YES;
}

-(void)willAnimateRotationToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration
{
    if (toInterfaceOrientation == UIInterfaceOrientationLandscapeLeft)
    {
        isLandscapeMode = YES;
        inLandscapeLeft = YES;
        inLandscapeRight = NO;
        frameForProfile =   CGRectMake(0, 0, self.view.bounds.size.width, self.view.bounds.size.height);
    }
    else if (toInterfaceOrientation == UIInterfaceOrientationLandscapeRight)
    {
        isLandscapeMode = YES;
        inLandscapeLeft = NO;
        inLandscapeRight = YES;
        frameForProfile =   CGRectMake(0, 0, self.view.bounds.size.width, self.view.bounds.size.height);
    }
    else
    {
        isLandscapeMode = NO;
        inLandscapeLeft = NO;
        inLandscapeRight = NO;
    }

}

set BOOL according to your requirement

回答4:

From you screenshots I can see that your app is tab base. Few days earlier I faced same problem. I solved it. I asked a question almost same to your. Then after a few hours of reading I solved the problem. There is the link to my question and answer.

回答5:

There are a lot of similar questions and answers on SO, but somehow none of them worked for me, as I needed to allow only portrait mode on iPhone, and only landscape mode on iPad, so sharing my solution:

1. Remove all methods related to device orientation (shouldAutoRotate, supportedInterfaceOrientations, preferredInterfaceOrientations, etc) as they might be conflicting with each other

2. In project settings enable all 4 modes: Portrait, Upside Down, Landscape left, Landscape Right

3. Chose a method for identifying device type (iPhone or iPad). I am using UIScreen.mainScreen().bounds.height which is not ideal but suits my needs

4. Place the following in AppDelegate

   func application(application: UIApplication, supportedInterfaceOrientationsForWindow window: UIWindow?) -> UIInterfaceOrientationMask {
   
       if UIScreen.mainScreen().bounds.height < 760 { //iPhone
           UIApplication.sharedApplication().setStatusBarOrientation(.Portrait, animated: false);
           return UIInterfaceOrientationMask.Portrait;
       } else {
           UIApplication.sharedApplication().setStatusBarOrientation(.LandscapeLeft, animated: false);
           return UIInterfaceOrientationMask.Landscape;
       }
   }
   

Tested on Xcode 7.1.1 all iPhone and iPad simulators running iOS9.1