UINavigationController 以编程方式全局更改导航栏色调颜色

发布于 2025-01-08 19:18:02 字数 943 浏览 3 评论 0原文

此代码可以更改应用程序中各处 UINavigationBar 的颜色。但是，我注意到它不会改变 UINavigationBar 使用的 UIColor UINavigationController （我的来自UIStoryboard）。

UIColor* navBarColor = [UIColor colorWithRed:arc4random()%100/100.0 
                                       green:arc4random()%100/100.0 
                                        blue:arc4random()%100/100.0 
                                       alpha:1];
[[UINavigationBar appearance] setTintColor:navBarColor];

[[UINavigationBar appearance] setBarStyle:UIBarStyleBlackTranslucent];
[[UINavigationBar appearance] setAlpha:0.7];

有没有办法访问UINavigationController的导航栏的appearance对象？我知道如何设置各个控制器的色调，但我想对他们的外观有全局的控制权。

更新：这是我的错误，代码确实更改了所有 UINavigationBars 的 UIColor，但它需要覆盖和暴露根导航控制器（例如呈现模式视图控制器），然后它将用新的 UIColors 重新绘制自己！

谢谢你！

原文

This code can change color of a UINavigationBar everywhere within the application. However, I noticed that it does not change the UIColor of the UINavigationBar used by UINavigationController (mine comes from a UIStoryboard).

UIColor* navBarColor = [UIColor colorWithRed:arc4random()%100/100.0 
                                       green:arc4random()%100/100.0 
                                        blue:arc4random()%100/100.0 
                                       alpha:1];
[[UINavigationBar appearance] setTintColor:navBarColor];

[[UINavigationBar appearance] setBarStyle:UIBarStyleBlackTranslucent];
[[UINavigationBar appearance] setAlpha:0.7];

Is there a way to access the appearance object of a UINavigationController's navigation bar? I know how to set tints of individual controllers, but I want to have a global control over how they look.

Update:
This was my mistake, the code does change the UIColor of all UINavigationBars, but it requires the root navigation controller to be covered and uncovered(for example presenting a modal view controller), then it will re-draw itself with new UIColors!

Thank you!

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酷到爆炸 2025-01-15 19:18:02

现在在 iOS 8 中我们可以这样设置色调颜色：-

self.navigationController.navigationBar.barTintColor = [UIColor redColor];

Now in iOS 8 we can set tint color by this :-

self.navigationController.navigationBar.barTintColor = [UIColor redColor];

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走走停停 2025-01-15 19:18:02

您可以使用 appearance 代理全局更改条形颜色：

NSDictionary *textTitleOptions = 
[NSDictionary dictionaryWithObjectsAndKeys:[UIColor darkGrayColor], 
                                           UITextAttributeTextColor, 
                                           [UIColor whiteColor],  
                                           UITextAttributeTextShadowColor, nil];

[[UINavigationBar appearance] setTitleTextAttributes:textTitleOptions];
textTitleOptions = 
 [NSDictionary dictionaryWithObjectsAndKeys:[UIColor darkGrayColor], 
                                            UITextAttributeTextColor, nil];
[[UINavigationBar appearance] setTintColor:[UIColor redColor]];
[[UIToolbar appearance] setTintColor:[UIColor redColor]];
[[UIBarButtonItem appearance] setTintColor:[UIColor redColor]];

You can change bar colours globally using appearance proxy:

NSDictionary *textTitleOptions = 
[NSDictionary dictionaryWithObjectsAndKeys:[UIColor darkGrayColor], 
                                           UITextAttributeTextColor, 
                                           [UIColor whiteColor],  
                                           UITextAttributeTextShadowColor, nil];

[[UINavigationBar appearance] setTitleTextAttributes:textTitleOptions];
textTitleOptions = 
 [NSDictionary dictionaryWithObjectsAndKeys:[UIColor darkGrayColor], 
                                            UITextAttributeTextColor, nil];
[[UINavigationBar appearance] setTintColor:[UIColor redColor]];
[[UIToolbar appearance] setTintColor:[UIColor redColor]];
[[UIBarButtonItem appearance] setTintColor:[UIColor redColor]];

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つ低調成傷 2025-01-15 19:18:02

当您声明 UINavigationController 时，请尝试以下操作：

UINavigationController *myNavController = 
[[UINavigationController alloc] initWithRootViewController:myRootViewController];
myNavController.navigationBar.tintColor = 
    [UIColor colorWithRed:arc4random() % 100 / 100.0f
                    green:arc4random() % 100 / 100.0f
                     blue:arc4random() % 100 / 100.0f
                    alpha:1.0f];

When you declaring your UINavigationController, try this:

UINavigationController *myNavController = 
[[UINavigationController alloc] initWithRootViewController:myRootViewController];
myNavController.navigationBar.tintColor = 
    [UIColor colorWithRed:arc4random() % 100 / 100.0f
                    green:arc4random() % 100 / 100.0f
                     blue:arc4random() % 100 / 100.0f
                    alpha:1.0f];

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