像Twitter的Compose Button一样全局/持久的UIBarButtonItem？

Question

我有一个UINavigationController，其中有很多viewControllers，我想在右上角添加UIBarButtonItem。我这样做了，但我必须对每个视图控制器单独执行此操作。添加一次并将其保留在整个应用程序中的最佳模式是什么？

Answer 1

是的，您可以像在appDelegate中一样创建一个全局函数，并在该函数上传递一些参数。就像传递你的navigationController，target，selector。

以下是示例代码段。

- (UIBarbuttonItem *) rightBarButtonGlobal:(UINavigationItem*)navigationItem target:(id)target {
  //you can also pass nsstring for title and selector for you desired selector.
  //But as per your question I assume you want a application logo like button in navigation bar. If that is the case just pass navigationItem as parameter.Create your logo button and assign to navigationItem.
  //Allocate button here
  navigationItem.rightBarButtonItem = button;
  [button release];
}