UINavigationBar，纯色iOS 5 [英] UINavigationBar with solid color iOS 5

问题描述

我正在使用该类别来自定义导航栏。我的代码是：

I'm using the category to customize nav bar. My code is:

- (void) drawRect:(CGRect)rect {
    CGContextRef context = UIGraphicsGetCurrentContext();
    CGContextSetFillColor(context, CGColorGetComponents([self.tintColor CGColor]));
    CGContextFillRect(context, rect);
}

它运作良好，但在iOS 5中不行。我需要导航栏颜色到坚实没有任何渐变。我应该怎么做？

It works well, but not in iOS 5. I need nav bar color to be solid without any gradient. How should I do this?

据我所知，对于iOS 5，替换 drawRect 方法的唯一方法是创建一个子类，但有没有办法让所有导航控制器使用 UINavigationBar 子类而不是原始类？

As I know, for iOS 5 the only way to replace drawRect method is to make a subclass, but is there any way to make all navigation controllers to use UINavigationBar subclass instead of original class?

推荐答案

在iOS 5中，您可以使用UIAppearance协议设置应用中所有UINavigationBars的外观。参考：链接。

In iOS 5 you can use the UIAppearance protocol to set the appearance of all UINavigationBars in your app. Reference: link.

我获得纯色的方法是为导航栏创建自定义图像，并将其设置为UINavigationBars背景。您可能必须创建与UINavigationBar大小相同的图像，至少这就是我所做的。

The way I got a solid color was to create a custom image for the navigation bar, and set it as UINavigationBars background. You might have to create the image with the same size as the UINavigationBar, at least that's what I did.

在您的应用委托中，执行以下操作：

In your app delegate, do something like this:

UIImage *image = [UIImage imageNamed:@"navbarbg.png"];
[[UINavigationBar appearance] setBackgroundImage:image forBarMetrics:UIBarMetricsDefault];

您还必须添加 UIAppearanceContainer 协议到头文件：

You also have to add the UIAppearanceContainer protocol to the header file:

@interface AppDelegate : UIResponder <UIApplicationDelegate, UIAppearanceContainer>

@end

你可以通过设置一些颜色来达到同样的效果什么的，而不是图像。但我发现这是一个简单的解决方案。

You can probably achieve the same thing by setting some color or something, instead of an image. But I found this to be an easy solution.

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