全局/持久UIBarButtonItem就像Twitter的撰写按钮？

Question

我有一个UINavigationController与很多viewControllers，我想添加一个UIBarButtonItem到右上角。我这样做了，但我必须对每个视图控制器单独执行此操作。什么是最好的模式添加一次，并让它留在整个应用程序？

Answer 1

是的，你可以创建一个像appDelegate一样的全局函数，并传递该函数的一些参数。就像传递你的navigationController，target，selector一样。

以下是示例代码片段。

- (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]; 
}