iOS5中自定义UINavigation栏

发布于 2024-12-10 15:57:59 字数 635 浏览 0 评论 0原文

更新到 Xcode 4.2 后我遇到了问题。之前我使用下面的代码来制作自定义导航栏，但是当我使用iPhone 5.0模拟器时，它失败了，而在iPhone 4.2模拟器中却没问题。

我可以知道问题是什么以及如何解决这个问题吗？

非常感谢

@implementation UINavigationBar (UINavigationBarCustomDraw)
- (void) drawRect:(CGRect)rect {

   [self setTintColor:[UIColor colorWithRed:0.4f
                                    green: 0.0f
                                     blue:0.4f 
                                    alpha:1]];

   if ([self.topItem.title length] > 0 && ![self.topItem.title isEqualToString:@""]) 
   {
        [[UIImage imageNamed:@"purple.jpg"] drawInRect:rect];   
   }
}

@end

原文

I am having troubles after updating to Xcode 4.2.
Before I used the following codes for making custom navigation bar, but when i use iPhone 5.0 simulator, it fails whereas in iPhone 4.2 simulator it was ok.

May I know what is the problem and how can i fix this?

Many thanks

@implementation UINavigationBar (UINavigationBarCustomDraw)
- (void) drawRect:(CGRect)rect {

   [self setTintColor:[UIColor colorWithRed:0.4f
                                    green: 0.0f
                                     blue:0.4f 
                                    alpha:1]];

   if ([self.topItem.title length] > 0 && ![self.topItem.title isEqualToString:@""]) 
   {
        [[UIImage imageNamed:@"purple.jpg"] drawInRect:rect];   
   }
}

@end

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伪心 2024-12-17 15:57:59

如果您需要带有某些图像的自定义 UINavigationbar，那么您需要将此代码放入 rootViewController 中，该 rootViewController 是导航堆栈的第一个视图（ A > B > C ，因此您必须将其放入 A 中）

- (void)viewDidLoad
{
  [super viewDidLoad];

  [[UIDevice currentDevice] systemVersion];

  if ([[[UIDevice currentDevice] systemVersion] floatValue] > 4.9) {

      //iOS 5
      UIImage *toolBarIMG = [UIImage imageNamed: @"purple.jpg"];  

      if ([self.navigationController.navigationBar respondsToSelector:@selector(setBackgroundImage:forBarMetrics:)]) { 
         [[UINavigationBar appearance] setBackgroundImage:toolBarIMG forBarMetrics:UIBarMetricsDefault]; 
      }

      } else {

      //iOS 4
      [self.navigationController.navigationBar insertSubview:[[[UIImageView alloc] initWithImage:[UIImage imageNamed:@"purple.jpg"]] autorelease] atIndex:0];  
       }
   }
}

If you need custom UINavigationbar with some image so you need to put this code in rootViewController that is first view of navigate stack (A > B > C , so you have to put this in A)

- (void)viewDidLoad
{
  [super viewDidLoad];

  [[UIDevice currentDevice] systemVersion];

  if ([[[UIDevice currentDevice] systemVersion] floatValue] > 4.9) {

      //iOS 5
      UIImage *toolBarIMG = [UIImage imageNamed: @"purple.jpg"];  

      if ([self.navigationController.navigationBar respondsToSelector:@selector(setBackgroundImage:forBarMetrics:)]) { 
         [[UINavigationBar appearance] setBackgroundImage:toolBarIMG forBarMetrics:UIBarMetricsDefault]; 
      }

      } else {

      //iOS 4
      [self.navigationController.navigationBar insertSubview:[[[UIImageView alloc] initWithImage:[UIImage imageNamed:@"purple.jpg"]] autorelease] atIndex:0];  
       }
   }
}

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