如何在appdelegate上查看横向和纵向模式？

Question

i want to run app in landscape and portrait mode,

How to check landscape and portrait mode on Appdelegate?

I try to call

- (BOOL) isPad{ 
#ifdef UI_USER_INTERFACE_IDIOM
    return (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad);
#else
    return NO;
#endif
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    // Return YES for supported orientations
    if ([self isPad]) {
        NSLog(@"is pad method call");
        return YES;
    }
    else 
    {
        return UIInterfaceOrientationIsPortrait(interfaceOrientation);
    }

}



- (BOOL)isPadPortrait
{

    return (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad
            && (self.interfaceOrientation == UIInterfaceOrientationPortrait
                || self.interfaceOrientation == UIInterfaceOrientationPortraitUpsideDown));
}


- (BOOL)isPadLandscape
{

    return (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad
            && (self.interfaceOrientation == UIInterfaceOrientationLandscapeRight
                || self.interfaceOrientation == UIInterfaceOrientationLandscapeLeft));

}

but gives error Property interface orientation not found on object of type appdelegate.

How can i do that?

Answer 1

You should check the current orientation of your iPad using. I would recommend you to check these conditions on every view and act according to the current orientation:

if([UIApplication sharedApplication].statusBarOrientation == UIInterfaceOrientationLandscapeLeft)
{
      //Do what you want in Landscape Left
}
else if([UIApplication sharedApplication].statusBarOrientation == UIInterfaceOrientationLandscapeRight)
{
      //Do what you want in Landscape Right
}
else if([UIApplication sharedApplication].statusBarOrientation == UIInterfaceOrientationPortrait)
{
     //Do what you want in Portrait
}
else if([UIApplication sharedApplication].statusBarOrientation == UIInterfaceOrientationPortraitUpsideDown)
{
      //Do what you want in Portrait Upside Down
}

I hope this helps you. :)

Feel free to contact me if you require any help.

Answer 2

-(void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation
  {
    if ([[UIDevice currentDevice] orientation] == UIDeviceOrientationLandscapeLeft || [[UIDevice currentDevice] orientation ]== UIDeviceOrientationLandscapeRight)
     {
       NSLog(@"Lanscapse");
     }
    if([[UIDevice currentDevice] orientation] == UIDeviceOrientationPortrait || [[UIDevice currentDevice] orientation] == UIDeviceOrientationPortraitUpsideDown )
     {
       NSLog(@"UIDeviceOrientationPortrait");
     }
  }

Answer 3

- (void)applicationDidFinishLaunching:(UIApplication *)application {


    UIDeviceOrientation   orientation = [UIDevice currentDevice].orientation;

    NSString   *nibName = UIDeviceOrientationIsLandscape(orientation) ? @"Landscape" : @"Portrait";


    NSLog(@"orientation is %@",nibName);
}

Answer 4

委托方向是我们在plist中指定的方向，如果我们没有在plist中指定任何方向，它将采用纵向模式默认。但是在委托中你只有不支持你必须添加的方向的关键窗口视图控制器或具有视图的任何导航控制器然后您可以调用这些功能，它们将为您的设备提供正确的方向。