How to fix orientation?

Question

I need to fix orientation portrait or landscapeLeft like Youtube's full screen. When a user click button, it was changed portrait or landscapeLeft. and was fixed. The user can control only by button.

accept Device orientation Portrait, Landscape Left in General It's my code

AppDelegate

-(UIInterfaceOrientationMask)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window 
{
        if(restrictRotation)
            return UIInterfaceOrientationMaskPortrait;
        else
            return UIInterfaceOrientationMaskLandscapeLeft;
}

ViewController

-(void) restrictRotation:(BOOL) restriction
{
    AppDelegate* appDelegate = (AppDelegate*)[UIApplication sharedApplication].delegate;
    appDelegate->restrictRotation = restriction;
}

- (IBAction)rotateOrientationAction:(id)sender 
    {
        [self restrictRotation:NO];
        if(isPortrait){
            [[UIDevice currentDevice] setValue:@(UIInterfaceOrientationLandscapeLeft) forKey:@"orientation"];
            self.myNewScrollViewHeight.constant = self.view.frame.size.height - self.naviBar.frame.size.height - self.horizMenu.frame.size.height;
            self.portraitMenuView.hidden = YES;

        }else{

            [[UIDevice currentDevice] setValue:@(UIInterfaceOrientationPortrait) forKey:@"orientation"];
            self.myNewScrollViewHeight.constant = self.view.frame.size.height * 0.5;
            self.portraitMenuView.hidden = NO;
        }
        isPortrait = !isPortrait;
       [self restrictRotation:YES];
    }

If I click the button, it was changed landscapeLeft but not changed portrait again.

Thank you

Answer 1

Your condition is not satisfied for restrictRotation, please check below code to desire result.

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    isPortrait = YES;
}

-(void) restrictRotation:(BOOL) restriction
{
    AppDelegate* appDelegate = (AppDelegate*)[UIApplication sharedApplication].delegate;
    appDelegate.restrictRotation = restriction;
}

- (IBAction)rotateOrientationAction:(id)sender
{
    if (isPortrait) {
        [self restrictRotation:NO];
        [[UIDevice currentDevice] setValue:@(UIInterfaceOrientationLandscapeLeft) forKey:@"orientation"];
    } else {
        [self restrictRotation:YES];
        [[UIDevice currentDevice] setValue:@(UIInterfaceOrientationPortrait) forKey:@"orientation"];
    }

    isPortrait = !isPortrait;
}

Update :

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    isPortrait = YES;
}


- (IBAction)rotateOrientationAction:(id)sender
{
    AppDelegate* appDelegate = (AppDelegate*)[UIApplication sharedApplication].delegate;
    appDelegate.restrictRotation = NO;
    [[UIDevice currentDevice] setValue:@(UIInterfaceOrientationPortrait) forKey:@"orientation"];

    if (isPortrait)
    {
        [[UIDevice currentDevice] setValue:@(UIInterfaceOrientationLandscapeLeft) forKey:@"orientation"];
    }
    else
    {
        [[UIDevice currentDevice] setValue:@(UIInterfaceOrientationPortrait) forKey:@"orientation"];
    }

    isPortrait = !isPortrait;
}