如何以横向模式以肖像方式显示？

Question

I have a calculator screen in Iphone, when i launched it displayed in portrait,but i want to display the calculator screen in landscape mode from portrait and also change the orientation, how?

I tried the source code:

      self.view.transform = CGAffineTransformIdentity;
      self.view.transform = CGAffineTransformMakeRotation((M_PI * (90) / 180.0)); 
      self.view.bounds = CGRectMake(0.0, 0.0, 480, 320);

It is used first time launched only landscape mode in portrait, but change the orientation not working, any one help me.

Answer 1

Try this:

[[UIApplication sharedApplication] setStatusBarOrientation:UIInterfaceOrientationLandscapeRight animated:NO];
[[self view] setBounds:CGRectMake(0, 0, 480, 320)];
[[self view] setCenter:CGPointMake(160, 240)];
[[self view] setTransform:CGAffineTransformMakeRotation(M_PI / 2)]; 

Answer 2

    - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
    {
        return YES
    }

Now make use of any one method for ur rotation 
- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration;
- (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation;
    Hope this help.

Answer 3

THE same question here

My sandbox app: https://github.com/comonitos/programatical_device_orientation

The solution is easy:

in interface (h file) :

    BOOL rotated;

in implementation (m file): 1. rewrite

    -(BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
    {
    return rotated;
    }

2 call [self setup]

    -(void) setup { 
    rotated = YES; 
    [[UIDevice currentDevice] setOrientation:UIDeviceOrientationLandscapeLeft]; 
    rotated = NO; 
    }