ios - 向 UINavigationController 添加自定义 View

Question

我有一个 UINavigationController，当一个事件被触发时，我需要一个自定义的 UIView 出现在 NavigationBar 的正下方，但不会阻碍当前 ViewController。我还需要使 UIView 在弹出/按下 Controller 时保持不变。

 -----------------
|   Status Bar    |
 -----------------
|     Nav Bar     |
 -----------------
|   Custom View   |
 -----------------
|                 |
| View Controller |
|                 |
 -----------------

我目前正在让我的 CustomView (UIView) 像这样设置框架:

- (id)initWithNavigationController:(UINavigationController *)navController {
    self.navController = navController;
    return [self init];
}

- (id)init
{
    CGRect viewFrame = self.navController.view.frame;

    return [self initWithFrame:CGRectMake(viewFrame.origin.x,
                                      self.navController.navigationBar.frame.origin.y + self.navController.navigationBar.frame.size.height,
                                      viewFrame.size.width,
                                      40.0)];
}

这是解决问题的方法吗？

Answer 1

- (id)initWithNavigationController:(UINavigationController *)navController {
    CGRect viewFrame = navController.view.frame;

    if (self = [super initWithFrame:CGRectMake(viewFrame.origin.x,
                                      navController.navigationBar.frame.origin.y + navController.navigationBar.frame.size.height,
                                      viewFrame.size.width,
                                      40.0)]){
       self.navController = navController;
      }
    return self;
   }

然后

CustomView* _myCustomView = [[CustomView alloc] initWithNavigationController:navigationController];
[navigationcontroller.view addSubview:_myCustomView];