将项目添加到NavigationBar（不使用UINavigationController）

问题描述

我有一个UIViewController与其UITableView，并且还添加了一个UINavigationBar。
如何在程序中添加和编辑按钮和+按钮？
（我已经尝试使用IB，但标题总是替换，而不是其他项目添加）
我没有使用UINavigationController。

$ b

这是我试过的没有成功：

c $ c> UIBarButtonItem * barButton =
[[UIBarButtonItem alloc] initWithBarButtonSystemItem：UIBarButtonItemStyleBordered
target：nil
action：nil];
UINavigationItem * editItem = [[UINavigationItem alloc] initWithTitle：@Title];
[editItem setLeftBarButtonItem：barButton animated：YES];
[navigationBar setItems：[NSArray arrayWithObject：editItem] animated：YES];

解决方案

您的 UIViewController 有一个 navigationItem 属性。您可以使用 self.navigationItem.leftBarButtonItem = ... 和 self.navigationItem.rightBarButtonItem = ...设置左侧和右侧栏按钮项。 / code>

编辑：

请参考您的 UINavigationBar ？
然后我想你会添加一个 UINavigationItem ：

  UINavigationItem * item = [[UINavigationItem assign] initWithTitle：@A Title]; 
 theNavigationBar.items = [NSArray arrayWithObject：item]; 
 [item release]; //或将其保存为实例变量
  

，然后设置该项目的左右按钮： p>

  theNavigationBar.topItem.leftBarButtonItem = ...; 
 theNavigationBar.topItem.rightBarButtonItem = ...; 
  

我没有尝试过，但我认为它应该工作。

I have a UIViewController with a UITableView in it, and also added a UINavigationBar.How can I add and "edit" button and a "+" button in that bar programmatically?(I have tried using IB, but the title is always replaced, and not other items are added)I am not using a UINavigationController. is my UIViewController standing alone.

This is what I have tried without success:

UIBarButtonItem *barButton =
    [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonItemStyleBordered
                                                  target:nil
                                                  action:nil];
UINavigationItem *editItem = [[UINavigationItem alloc] initWithTitle:@"Title"];
[editItem setLeftBarButtonItem:barButton animated:YES];
[navigationBar setItems:[NSArray arrayWithObject:editItem] animated:YES];

解决方案

Your UIViewController has a navigationItem property. You can set the left and right bar button items with self.navigationItem.leftBarButtonItem = ... and self.navigationItem.rightBarButtonItem = ...

Edit:

OK, I assume you have a reference to your UINavigationBar?Then I guess you'd add a single UINavigationItem to it:

UINavigationItem *item = [[UINavigationItem alloc] initWithTitle:@"A Title"];
theNavigationBar.items = [NSArray arrayWithObject:item];
[item release]; // or keep this as an instance variable

and then set that item's left and right buttons:

theNavigationBar.topItem.leftBarButtonItem = ...;
theNavigationBar.topItem.rightBarButtonItem = ...;

I haven't tried this, but I think it should work.

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