iOS - 使用外观全局更改导航栏标题颜色？
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iOS - Globally change navigation bar title color using appearance?
提问by RyJ
This crashes the app:
这会使应用程序崩溃：
[[UINavigationBar appearance] setTitleColor:[UIColor darkGrayColor] forState:UIControlStateNormal];
Is there a way to do this using appearance?
有没有办法使用外观来做到这一点？
回答by RyJ
This worked:
这有效：
NSDictionary *textTitleOptions = [NSDictionary dictionaryWithObjectsAndKeys:[UIColor darkGrayColor], UITextAttributeTextColor, [UIColor whiteColor], UITextAttributeTextShadowColor, nil];
[[UINavigationBar appearance] setTitleTextAttributes:textTitleOptions];
回答by Iya
Here's an example of how to do this in Swift:
以下是如何在 Swift 中执行此操作的示例：
UINavigationBar.appearance().titleTextAttributes =
[NSFontAttributeName:UIFont(name:"Exo2-Bold", size: 18) as! AnyObject,
NSForegroundColorAttributeName:UIColor.whiteColor()]
回答by Ryan Poolos
That crashes the app before UINavigationBar doesn't have a title or state... Those are UIButton methods
在 UINavigationBar 没有标题或状态之前使应用程序崩溃......这些是 UIButton 方法
You need
你需要
[[UINavigationBar appearance] setTintColor:[UIColor darkGrayColor]];
回答by Max MacLeod
The @RyJ answer is great and worked for me. Thought I'd chip in that there's a good tutorial on this in Ray Wenderlich's site, titled (excuse the pun):
@RyJ 的回答很棒，对我有用。我想我会说在 Ray Wenderlich 的网站上有一个很好的教程，标题为（请原谅双关语）：
User Interface Customization in iOS 6
See the section Customizing UINavigationBar
请参阅自定义 UINavigationBar部分
Here's the code snippet for the navigation bar title, to change globally:
这是导航栏标题的代码片段，全局更改：
// Customize the title text for *all* UINavigationBars
[[UINavigationBar appearance] setTitleTextAttributes:
[NSDictionary dictionaryWithObjectsAndKeys:
[UIColor colorWithRed:255.0/255.0 green:255.0/255.0 blue:255.0/255.0 alpha:1.0],
UITextAttributeTextColor,
[UIColor colorWithRed:0.0 green:0.0 blue:0.0 alpha:0.8],
UITextAttributeTextShadowColor,
[NSValue valueWithUIOffset:UIOffsetMake(0, -1)],
UITextAttributeTextShadowOffset,
[UIFont fontWithName:@"Arial-Bold" size:0.0],
UITextAttributeFont,
nil]];
One other minor point is that it seems there's a default shadow on the title bar, so to get rid of it, you can't just remove the attribute. Instead you have to set a shadow offset:
另一个小问题是标题栏上似乎有一个默认阴影，因此要摆脱它，您不能只删除该属性。相反，您必须设置阴影偏移：
UITextAttributeTextShadowOffset : [NSValue valueWithUIOffset:UIOffsetMake(0, 0)]
回答by Muhammad Nabeel Arif
I used following code to change the title bar's color.
我使用以下代码来更改标题栏的颜色。
NSShadow *shadow = [[NSShadow alloc] init];
shadow.shadowColor = [UIColor blackColor];
shadow.shadowOffset = CGSizeMake(1, 0);
NSDictionary *titleTextAttributes = @{NSForegroundColorAttributeName:[UIColor whiteColor],
NSShadowAttributeName:shadow};
[[UINavigationBar appearance] setTitleTextAttributes:titleTextAttributes];
回答by T Blank
Using modern syntax and code that actually runs, this is how to globally style your UINavigationBartitle text:
使用实际运行的现代语法和代码，这是如何全局设置UINavigationBar标题文本的样式：
NSShadow *navigationBarTitleShadow = [[NSShadow alloc] init];
navigationBarTitleShadow.shadowColor = [UIColor colorWithWhite:0.5
alpha:0.5];
navigationBarTitleShadow.shadowOffset = CGSizeMake(2.0, 2.0);
[[UINavigationBar appearance] setTitleTextAttributes:@{ NSForegroundColorAttributeName : [UIColor blackColor],
NSFontAttributeName : [UIFont fontWithName:@"Arial-BoldMT"
size:30.0],
NSShadowAttributeName : navigationBarTitleShadow }];
Note: NSShadow's shadowBlurRadiusproperty is not respected.
注意：NSShadow的shadowBlurRadius属性不受尊重。
Note: Shadows are so iOS 6. Don't ever use them.
注意：阴影在 iOS 6 中是如此。永远不要使用它们。
