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我遇到了一个问题,我需要构建类似的东西,其中红条是 UIImageView,蓝条是导航栏:http: //imagizer.imageshack.us/v2/800x600q90/30/iqtt.png

我可以用下面的代码做到这一点,我的问题是,当我按下主页按钮关闭应用程序并重新打开它时,我的导航栏缩小,在链接图像上它有 88px,重新启动后是 44px,所以它弄乱了我的布局。

这是我在 viewDidAppear 上使用的代码:

    - (void)viewDidAppear:(BOOL)animated {
         [super viewDidAppear:animated];
         self.navigationController.view.frame = CGRectMake(0, 0, 320, 568);
         self.navigationController.navigationBar.frame = CGRectMake(0, 0, 320, 88);

         v = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 44)];
         UIImageView *img = [[UIImageView alloc] initWithFrame:CGRectMake(33, 5, 255, 29)];
         [img setImage:[UIImage imageNamed:@"top-logo"]];
         [v addSubview:img];
         [self.navigationController.navigationBar addSubview:v];
    }

我该如何解决这种行为?

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1 回答 1

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您永远不应该更改导航栏框架。而是隐藏导航栏,并创建您的自定义视图并将其添加到 self.view 的顶部。

 self.navigationController.navigationBarHidden =YES;
 self.view.frame = CGRectMake(0, 0, 320, 568);;

 // v is our total 88px height navigation bar
 v = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 88)];
 UIImageView *img = [[UIImageView alloc] initWithFrame:CGRectMake(33, 5, 255, 29)];
 [img setImage:[UIImage imageNamed:@"top-logo"]];
 [v addSubview:img];

 UIView *navigationBar = //create nav bar with buttons of height 44px
 [v addSubview:navigationBar];

[self.view addSubview:v];
于 2014-01-25T05:19:44.637 回答