iPhone 纵向导航栏高度仍然较短

Question

我的应用程序的 Root View Controller 支持任何方向，但用户可以导航到另一个仅支持横向方向的 View Controller 。

基本问题是，无论设备的实际物理方向如何，当用户弹回 Root View Controller 时，导航栏的高度都适合横向模式。我想弄清楚如何让导航栏以 44(纵向高度)而不是 32(横向高度)的高度显示。

虽然导航栏未设置为正确的高度，但 Root View Controller 的 UITableView 已正确偏移(距屏幕顶部 44 像素)。

在第二个 View Controller 的 -viewWillAppear 内:我执行标准旋转变换:

if (deviceOrientation == UIDeviceOrientationPortrait)
   {
   UIScreen *screen = [UIScreen mainScreen];
   CGFloat screenWidth = screen.bounds.size.width;
   CGFloat screenHeight = screen.bounds.size.height;
   UIView *navView = [[self navigationController] view];
   navView.bounds = CGRectMake(0, 0, screenHeight, screenWidth);
   navView.transform = CGAffineTransformIdentity;
   navView.transform = CGAffineTransformMakeRotation(degreesToRadians(90));
   navView.center = CGPointMake(screenWidth/2.0, screenHeight/2.0);
   [[UIApplication sharedApplication] setStatusBarOrientation:UIInterfaceOrientationLandscapeRight];
   }

因为这个辅助 View Controller 允许导航到从属 View Controller (以及弹出回 Root View Controller )，所以我将以下内容添加到 -viewWillDisappear:

if (deviceOrientation == UIDeviceOrientationPortrait)
   {
   UIScreen *screen = [UIScreen mainScreen];
   CGFloat screenWidth = screen.bounds.size.width;
   CGFloat screenHeight = screen.bounds.size.height;
   UIView *navView = [[self navigationController] view];
   navView.bounds = CGRectMake(0, 0, screenWidth, screenHeight);
   navView.transform = CGAffineTransformIdentity;
   navView.center = CGPointMake(screenWidth/2.0, screenHeight/2.0);
   [[UIApplication sharedApplication] setStatusBarOrientation:UIInterfaceOrientationPortrait];
   }

感谢您提供有关如何强制重新计算导航栏高度的建议。

Answer 1

不确定是否有更好的方法，但这有效:

[[self navigationController] setNavigationBarHidden:YES animated:NO];
[[self navigationController] popViewControllerAnimated:YES];
[[self navigationController] setNavigationBarHidden:NO animated:NO];

基本上，隐藏导航栏，弹出 View Controller 并显示导航栏。某处的一些代码调整了导航栏的高度，一切都很好。