带有纯色 iOS 5 的 UINavigationBar

发布于 2024-12-17 17:34:42 字数 438 浏览 0 评论 0原文

我正在使用类别来自定义导航栏。我的代码是：

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

它运行良好，但不适用于 iOS 5。我需要导航栏颜色为纯色，没有任何渐变。我该怎么做？

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，但是有没有办法让所有导航控制器都使用UINavigationBar子类而不是原来的班级？

原文

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);
}

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

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?

分享到QQ

分享到微博

如果你对这篇内容有疑问，欢迎到本站社区发帖提问参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。

发布评论

需要登录才能够评论，你可以免费注册一个本站的账号。

因为看清所以看轻 2024-12-24 17:34:42

在 iOS 5 中，您可以使用 UIAppearance 协议来设置应用程序中所有 UINavigationBar 的外观。参考：链接。

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，至少我是这样做的。

在您的应用程序委托中，执行如下操作：

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

您还必须将 UIAppearanceContainer 协议添加到头文件中：

@interface AppDelegate : UIResponder <UIApplicationDelegate, UIAppearanceContainer>

@end

您可能可以通过设置某种颜色或其他内容（而不是图像）来实现相同的操作。但我发现这是一个简单的解决方案。

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

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.

In your app delegate, do something like this:

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

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

@interface AppDelegate : UIResponder <UIApplicationDelegate, UIAppearanceContainer>

@end

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.

回复收藏 0 原文

红颜悴 2024-12-24 17:34:42

这涵盖了 iOS 5 和 iOS 4.3 及更早版本

https://gist.github.com/1774444

回复收藏 0 原文

双手揣兜 2024-12-24 17:34:42

这更像是一种黑客行为，并且一直对我有用。
这需要位于 AppDelegate 文件中。

//Create  a size struct.
CGSize size = CGSizeMake(768, 50);

//CReate a imagecontext from a non-existing image. You can use a existing image as well, in that case the color will be the color of the image. 
UIImage *backgroundImage = [UIImage imageNamed:@"nonexist.png"];

UIGraphicsBeginImageContext(size);

[backgroundImage drawInRect:CGRectMake(0,0,size.width,size.height)];

UIImage* newImage = UIGraphicsGetImageFromCurrentImageContext();

UIGraphicsEndImageContext();

self.navigationController = [[UINavigationController alloc]initWithRootViewController:self.viewController];

将背景颜色设置为您选择的颜色。

[self.navigationController.view setBackgroundColor:[UIColor blackColor]];

self.window.rootViewController = navigationController;
[self.window makeKeyAndVisible];

//Most important line.
[navigationController.navigationBar setBackgroundImage: newImage forBarMetrics:UIBarMetricsDefault];

This is more of a hack and has consistently worked for me.
This needs to be in the AppDelegate file.

//Create  a size struct.
CGSize size = CGSizeMake(768, 50);

//CReate a imagecontext from a non-existing image. You can use a existing image as well, in that case the color will be the color of the image. 
UIImage *backgroundImage = [UIImage imageNamed:@"nonexist.png"];

UIGraphicsBeginImageContext(size);

[backgroundImage drawInRect:CGRectMake(0,0,size.width,size.height)];

UIImage* newImage = UIGraphicsGetImageFromCurrentImageContext();

UIGraphicsEndImageContext();

self.navigationController = [[UINavigationController alloc]initWithRootViewController:self.viewController];

Set the background color to be the color of your choice.

[self.navigationController.view setBackgroundColor:[UIColor blackColor]];

self.window.rootViewController = navigationController;
[self.window makeKeyAndVisible];

//Most important line.
[navigationController.navigationBar setBackgroundImage: newImage forBarMetrics:UIBarMetricsDefault];

回复收藏 0 原文

~没有更多了~