自定义导航栏 [英] Custom navigation bar

问题描述

我正在抓住Dribble并找到了附件设计。我想知道如何做这样的自定义导航栏。我的意思是如何创建一次导航栏并为每个视图控制器隐式重用它。

I was crawling Dribble and found the attached design. I was wondering how to do a custom navigation bar like this. I mean how create the navigation bar once and reuse it implicitly for every view controllers.

我正在考虑拥有一种根视图控制器并继承其他视图控制器，但是我不知道怎么做。

I was thinking about having a kind of root view controller and inherit for other view controllers, but I don't know how to do this.

任何想法或链接都会被公布！

Any idea or link will be appreachated!

干杯。

Cyril

推荐答案

感谢iOS5，您现在可以自定义UINavigationBar的外观无需子类或创建类别。

Thanks to iOS5 you are now able to customise the appearance of a UINavigationBar without having to subclass or create a category.

以下代码块（将其放在applicationDidFinishLoading：方法中）将整个应用程序的UINavigationBar更改为您提供的任何图像它。

The following code block (put it in your applicationDidFinishLoading: method) will change the UINavigationBar for the whole application to whatever image you give it.

注意，这只适用于iOS5

[[UINavigationBar appearance] setBackgroundImage：[UIImage imageNamed：@nav bar.png] forBarMetrics：UIBarMetri csDefault];

但是，您还可以根据您使用的视图控制器来更改单个UINavigationBar的外观viewDidLoad中的以下代码。

However, you are also able to change the appearance of a single UINavigationBar depending on what view controller you're in by using the following code in viewDidLoad.

[self.navigationController.navigationBar setBackgroundImage：[UIImage imageNamed：@nav bar.png] forBarMetrics：UIBarMetricsDefault ];

以上代码仅讨论了iOS5自定义UINavigationBar外观的新方法。但是，它没有讨论按钮的实现方式。

然而，添加按钮完全是一个不同的游戏。为此，我建议继承 UINavigationBar ，然后在需要的地方添加按钮。您甚至可能只使用标准的 UINavigationBar ，但自定义 UIBarButtonItem 以特定视图运行。

However, adding the buttons is a different game altogether. For this, I would recommend subclassing UINavigationBar, and then adding in the buttons where needed through that. You could probably even get away with just a standard UINavigationBar but custom UIBarButtonItems that run off a particular view.

例如：

UIView *rightButton = [[[UIView alloc] initWithFrame:CGRectMake(0.0f, 0.0f, 30.0f, 30.0f)] autorelease];
[rightButton addSubview:[UIImage imageNamed:@"rightButtonImage.png"]];

UIBarButtonItem *rightButtonItem = [[[UIBarButtonItem alloc] initWithCustomView:rightButton] autorelease];
[rightButtonItem setAction:@selector(rightButtonAction:)];

我没有测试过该代码，因此它不是复制/粘贴解决方案，但它给出了你知道需要做些什么来完成自定义看UIBarButtonItems。

I haven't tested that code so it isn't a copy/paste solution, but it gives you an idea of what needs to be done to accomplish "custom" looking UIBarButtonItems.

祝你好运！

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