在iPhone导航栏上绘制自定义后退按钮 [英] Draw custom Back button on iPhone Navigation Bar

问题描述

我有一个带有NavigationBar的UIView，我想添加一个看起来像后退按钮样式的按钮。我没有使用UINavigationController并且想知道是否可以在没有它的情况下完成它？

I've got a UIView with a NavigationBar and I'd like to add a button which looks like the style of a Back Button. I'm not using a UINavigationController and was wondering if this could be done without it?

按钮的样式应如下所示：

The style of the button should look like this:

谢谢

推荐答案

您需要设置一个 UINavigationItem 对象的自定义堆栈，并将它们推送到UINavigationBar。这是我知道获得真正后退按钮的唯一方法。我没有测试过这段代码，但你应该这样做：

You need to set up a custom stack of UINavigationItem objects and push them on to the UINavigationBar. This is the only way I know of to get a true back button. I haven't tested this code, but you should do something like this:

UINavigationItem *previousItem =
    [[[UINavigationItem alloc] initWithTitle:@"Back title"] autorelease];

UINavigationItem *currentItem =
    [[[UINavigationItem alloc] initWithTitle:@"Main Title"] autorelease];

[navigationBar setItems:[NSArray arrayWithObjects:previousItem, currentItem, nil]
               animated:YES];

要处理按钮按下时你应该将自己设置为导航栏的委托并实现UINavigationBarDelegate委托。

To handle when the buttons are pressed you should set yourself as the navigation bar's delegate and implement the UINavigationBarDelegate delegates.

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