我使用UIAppearance自定义导航栏,标签栏和uibarbuttonitem等元素。除了UIBarButtonItem元素的一个非常奇怪的行为,它工作得很好。在导航控制器层次结构的顶层,一切看起来都不错,但是如果我推动下一个视图控制器,则UIBarButtonItem元素向下移动一点,但同时后退按钮保持在正确的位置。我附上两张图片来说明我的问题。使用UIAppearance时UIBarButtonItem的奇怪行为
1)在导航控制器层次
2)第二视图控制器在导航控制器层次
EDIT首先视图控制器:所述的代码
//Change navigation bar appearance
[[UINavigationBar appearance] setBackgroundImage:[UIImage imageNamed:@"GPNavigationBarBackground.png"] forBarMetrics:UIBarMetricsDefault];
[[UINavigationBar appearance] setShadowImage:[[UIImage alloc] init]];
[[UINavigationBar appearance] setShadowImage:[UIImage imageNamed:@"GPNavigationBarShadow.png"]];
[[UINavigationBar appearance] setTitleTextAttributes:
[NSDictionary dictionaryWithObjectsAndKeys:
[UIColor whiteColor], UITextAttributeTextColor,
[UIFont boldSystemFontOfSize:17], UITextAttributeFont,nil]];
[[UINavigationBar appearance] setTitleVerticalPositionAdjustment:2.f forBarMetrics:UIBarMetricsDefault];
UIImage *buttonBackground = [[UIImage imageNamed:@"GPNavigationBarButton.png"] resizableImageWithCapInsets:UIEdgeInsetsMake(0, 10, 0, 10)];
UIImage *buttonPressedBackground = [[UIImage imageNamed:@"GPNavigationBarButtonPressed.png"] resizableImageWithCapInsets:UIEdgeInsetsMake(0, 10, 0, 10)];
UIImage *backButtonBackground = [[UIImage imageNamed:@"GPNavigationBarBackButton.png"] resizableImageWithCapInsets:UIEdgeInsetsMake(0, 15, 0, 10)];
UIImage *backButtonPressedBackground = [[UIImage imageNamed:@"GPNavigationBarBackButtonPressed.png"] resizableImageWithCapInsets:UIEdgeInsetsMake(0, 15, 0, 10)];
[[UIBarButtonItem appearance] setBackgroundImage:buttonBackground forState:UIControlStateNormal barMetrics:UIBarMetricsDefault];
[[UIBarButtonItem appearance] setBackgroundImage:buttonPressedBackground forState:UIControlStateHighlighted barMetrics:UIBarMetricsDefault];
[[UIBarButtonItem appearance] setBackButtonBackgroundImage:backButtonBackground forState:UIControlStateNormal barMetrics:UIBarMetricsDefault];
[[UIBarButtonItem appearance] setBackButtonBackgroundImage:backButtonPressedBackground forState:UIControlStateHighlighted barMetrics:UIBarMetricsDefault];
[[UIBarButtonItem appearance] setBackButtonBackgroundVerticalPositionAdjustment:1.f forBarMetrics:UIBarMetricsDefault];
[[UIBarButtonItem appearance] setBackgroundVerticalPositionAdjustment:1.f forBarMetrics:UIBarMetricsDefault];
[[UIBarButtonItem appearance] setTitlePositionAdjustment:UIOffsetMake(0, 1.f) forBarMetrics:UIBarMetricsDefault];
我们可以看到你的UIAppearance代码和UIbarbuttonItem代码吗? –