更改UIBarButtonItem的字体

Question

我有一个UIBarButtonItem在我的UIToolbar标题做了.现在我想用Bold 将字体从默认字体更改为"Trebuchet MS".我怎样才能做到这一点？

Answer 1

确切地说,这可以如下完成

[buttonItem setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys: 
    [UIFont fontWithName:@"Helvetica-Bold" size:26.0], NSFontAttributeName,
    [UIColor greenColor], NSForegroundColorAttributeName,
    nil] 
                          forState:UIControlStateNormal];

或者使用对象文字语法:

[buttonItem setTitleTextAttributes:@{
     NSFontAttributeName: [UIFont fontWithName:@"Helvetica-Bold" size:26.0],
     NSForegroundColorAttributeName: [UIColor greenColor]
} forState:UIControlStateNormal];

为方便起见,这是Swift实现:

buttonItem.setTitleTextAttributes([
        NSAttributedStringKey.font: UIFont(name: "Helvetica-Bold", size: 26.0)!,
        NSAttributedStringKey.foregroundColor: UIColor.green],
    for: .normal)

Answer 2

因为UIBarButtonItem继承自UIBarItem,所以您可以尝试

- (void)setTitleTextAttributes:(NSDictionary *)attributes
                  forState:(UIControlState)state

但这仅适用于iOS5.对于iOS 3/4,您必须使用自定义视图.

Answer 3

对于那些有兴趣在整个应用程序中使用UIAppearance它们UIBarButtonItem的字体样式的人来说,可以使用以下代码行完成:

目标C:

NSDictionary *barButtonAppearanceDict = @{NSFontAttributeName : [UIFont fontWithName:@"HelveticaNeue-Light" size:12.0], NSForegroundColorAttributeName: [UIColor whiteColor]};
[[UIBarButtonItem appearance] setTitleTextAttributes:barButtonAppearanceDict forState:UIControlStateNormal];

Swift 2.3:

UIBarButtonItem.appearance().setTitleTextAttributes(
[
    NSFontAttributeName : UIFont(name: "HelveticaNeue-Light", size: 12)!,
    NSForegroundColorAttributeName : UIColor.white
],
for: .normal)

斯威夫特3

UIBarButtonItem.appearance().setTitleTextAttributes(
[
    NSFontAttributeName : UIFont(name: "HelveticaNeue-Light", size: 12)!,
    NSForegroundColorAttributeName : UIColor.white,
], for: .normal)

斯威夫特4

UIBarButtonItem.appearance().setTitleTextAttributes(
[
    NSAttributedStringKey.font : UIFont(name: "HelveticaNeue-Light", size: 12)!,
    NSAttributedStringKey.foregroundColor : UIColor.white,
], for: .normal)

或者对于单个UIBarButtonItem(不适用于所有应用程序范围),如果您特别为一个按钮设置了自定义字体:

斯威夫特3

let barButtonItem = UIBarButton()
barButtonItem.setTitleTextAttributes([
    NSFontAttributeName : UIFont(name: "FontAwesome", size: 26)!,
    NSForegroundColorAttributeName : UIColor.white,
], for: .normal)
barButtonItem.title = "\u{f02a}"

斯威夫特4

let barButtonItem = UIBarButton()
barButtonItem.setTitleTextAttributes([
    NSAttributedStringKey.font : UIFont(name: "FontAwesome", size: 26)!,
    NSAttributedStringKey.foregroundColor : UIColor.white,
], for: .normal)
barButtonItem.title = "\u{f02a}"

当然,您可以将字体和大小更改为您想要的任何内容.我更喜欢将此代码AppDelegate.m放在该didFinishLaunchingWithOptions部分的文件中.

可用属性(只需将它们添加到NSDictionary):

• NSFontAttributeName:用a更改字体 UIFont
• NSForegroundColorAttributeName:改变颜色 UIColor
• NSShadow:添加投影(请参阅NSShadow类引用)

(针对iOS7 +更新)

Answer 4

在Swift中你会这样做:

backButtonItem.setTitleTextAttributes([
        NSFontAttributeName : UIFont(name: "Helvetica-Bold", size: 26)!,
        NSForegroundColorAttributeName : UIColor.blackColor()],
    forState: UIControlState.Normal)

Answer 5

以上是很好的答案.只需更新iOS7:

NSDictionary *barButtonAppearanceDict = @{NSFontAttributeName : [UIFont fontWithName:@"HelveticaNeue-Thin" size:18.0] , NSForegroundColorAttributeName: [UIColor whiteColor]};
    [[UIBarButtonItem appearance] setTitleTextAttributes:barButtonAppearanceDict forState:UIControlStateNormal];

Answer 6

Swift3

  buttonName.setAttributedTitle([
        NSFontAttributeName : UIFont.systemFontOfSize(18.0),
        NSForegroundColorAttributeName : UIColor.red,NSBackgroundColorAttributeName:UIColor.black],
                                     forState: UIControlState.Normal)

迅速

   barbutton.setTitleTextAttributes([
        NSFontAttributeName : UIFont.systemFontOfSize(18.0),
        NSForegroundColorAttributeName : UIColor.redColor(),NSBackgroundColorAttributeName:UIColor.blackColor()],
        forState: UIControlState.Normal)

Objective-C的

     [ barbutton setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:
        [UIFont fontWithName:@"Helvetica-Bold" size:20.0], NSFontAttributeName,
        [UIColor redColor], NSForegroundColorAttributeName,[UIColor blackColor],NSBackgroundColorAttributeName,
        nil]
        forState:UIControlStateNormal];

Answer 7

Swift 5 实现

rightButtonItem.setTitleTextAttributes([
            NSAttributedString.Key.font: UIFont(name: "Helvetica-Bold", size: 26.0)!,
            NSAttributedString.Key.foregroundColor: UIColor.green],
        for: .normal)

Answer 8

在Swift 4中，您可以UIBarButtonItem通过添加以下代码来更改的字体和颜色。

addTodoBarButton.setTitleTextAttributes(
        [
        NSAttributedStringKey.font: UIFont(name: "HelveticaNeue-Bold", size: 17)!,
        NSAttributedStringKey.foregroundColor: UIColor.black
        ], for: .normal)

Answer 9

为了一些UIBarButtonItems但不是全部这样做我推荐以下方法.

1. 创建一个UIBarButtonItem子类.不要添加任何东西 - 你只会将它用作故事板中的自定义类及其外观代理...
2. 在故事板中,将所有需要的自定义类更改为UIBarButtonItems子类
3. 在AppDelegate中导入UIBarButtonItem子类并添加以下行application:didFinishLaunchingWithOptions:

在我的情况下,我将子类UIBarButtonItem化为仅用于加粗文本的目的:

[[BoldBarButtonItem appearance] setTitleTextAttributes:
  [NSDictionary dictionaryWithObjectsAndKeys: 
    [UIFont boldSystemFontOfSize:18.0], NSFontAttributeName,nil] 
                                              forState:UIControlStateNormal];

Answer 10

这是正确的方法：声明您的 barButtonItem（在本例中为 rightBarButtonItem）并添加它 setTitleTextAttributes。

navigationItem.rightBarButtonItem = UIBarButtonItem(title: "Go!", style: .plain, target: self, action: #selector(yourFuncDestination))

添加标题属性后

navigationItem.rightBarButtonItem?.setTitleTextAttributes([.font : UIFont.systemFont(ofSize: 18, weight: .bold), .foregroundColor : UIColor.white], for: .normal)

您可以更改尺寸、重量（.bold、.heavy、.regular 等）以及您喜欢的颜色...希望这有帮助:)