iPhone + CGAffineTransFormRotate(pi/2)+ statusBarHidden:YES + presentModalViewController = 20像素的空白区域

我想你可能需要重新进入你的中心:

// Set the center point of the view to the center point of the window's content area.      
self.view.center = CGPointMake(160.0, 240.0);

这是我用于横向视图的整个init方法,并且没有问题.只需确保将笔尖设置为正确的尺寸.

// Implement viewDidLoad to do additional setup after loading the view.
- (void)viewDidLoad {
  [super viewDidLoad];

  // Rotate to landscape
  self.view.frame = CGRectMake(0, 0, 480.0, 320.0);
  if ([[UIApplication sharedApplication] statusBarOrientation] == UIInterfaceOrientationLandscapeRight) {
    CGAffineTransform transform = self.view.transform;

    // Set the center point of the view to the center point of the window's content area.      
    self.view.center = CGPointMake(160.0, 240.0);

    // Rotate the view 90 degrees around its new center point.
    transform = CGAffineTransformRotate(transform, (M_PI / 2.0));
    self.view.transform = transform;
  }
}