blocks|key|2913646|text|因为UIBarButtonItem继承自UIBarItem，所以您可以尝试|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2913647|-+(void)setTitleTextAttributes:(NSDictionary+*)attributes
++++++++++++++++++forState:(UIControlState)state|code-block|syntax|javascript|2913648|但这仅适用于iOS5。对于iOS+3/4，您必须使用自定义视图。|2913649|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

Because UIBarButtonItem inherits from UIBarItem, you can try

<pre><code>- (void)setTitleTextAttributes:(NSDictionary *)attributes
 forState:(UIControlState)state
</code></pre>

but this is for iOS5 only. For iOS 3/4, you will have to use a custom view.

blocks|key|244995|text|UIBarButton没有与更改字体相关的属性。但是你可以创建一个自定义字体的按钮，然后添加到UIBarButton中。它可能会解决你的问题|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|244996|entityMap^0|0|B|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

<code>UIBarButton</code> haven't property related to change the font. But you can create a button with custom font and then add into UIBarButton. It May be solved your problem

blocks|key|2913670|text|假设您想要支持iOS4和更早版本，最好的选择是使用initWithCustomView:方法创建一个条形按钮，并提供您自己的视图，该视图类似于UIButton，您可以在其中轻松地自定义字体。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2913671|如果要通过拖放而不是以编程方式创建按钮，还可以将UIButton拖动到界面生成器中的工具栏或导航栏上。|2913672|不幸的是，这意味着要自己创建按钮背景图像。在iOS5之前，没有办法定制标准UIBarButtonItem的字体。|2913673|entityMap^0|P|J|0|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@$9|M|A|N|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|O|8|@]|D|@]|E|$]]|$1|H|3|I|5|6|7|P|8|@]|D|@]|E|$]]|$1|J|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|K|$]]

Assuming you want to support iOS4 and earlier, your best bet is to create a bar button using the <code>initWithCustomView:</code> method and supply your own view which could be something like a UIButton where you can easily customise the font.

You can also drag a UIButton onto a toolbar or navigation bar in Interface Builder if you want to create the button with drag-and-drop instead of programmatically.

Unfortunately this means creating the button background image yourself. There's no way to customise the font of a standard UIBarButtonItem prior to iOS5.

blocks|key|2913680|text|您可以通过编程方式创建自定义UIView：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2913681|UIView+*buttonItemView+=+[[UIView+alloc]+initWithFrame:buttonFrame];|code-block|syntax|javascript|2913682|然后将图像、标签或任何您喜欢的内容添加到自定义视图中：|2913683|[buttonItemView+addSubview:customImage];

[buttonItemView+addSubview:customLabel];

...|2913684|现在把它放到你的UIBarButtomItem里。|2913685|UIBarButtonItem+*barButtonItem+=+[[UIBarButtonItem+alloc]+initWithCustomView:buttonItemView];|2913686|最后，将barButtonItem添加到导航栏中。|2913687|entityMap^0|E|6|0|0|0|0|8|F|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@$9|X|A|Y|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|Z|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|10|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|11|8|@]|D|@]|E|$I|J]]|$1|O|3|P|5|6|7|12|8|@$9|13|A|14|B|C]]|D|@]|E|$]]|$1|Q|3|R|5|H|7|15|8|@]|D|@]|E|$I|J]]|$1|S|3|T|5|6|7|16|8|@]|D|@]|E|$]]|$1|U|3|-4|5|6|7|17|8|@]|D|@]|E|$]]]|V|$]]

You can create a custom <code>UIView</code> programmatically:

<pre><code>UIView *buttonItemView = [[UIView alloc] initWithFrame:buttonFrame];
</code></pre>

Then add images, labels or whatever you like to your custom view:

<pre><code>[buttonItemView addSubview:customImage];

[buttonItemView addSubview:customLabel];

...
</code></pre>

Now put it in your <code>UIBarButtomItem</code>.

<pre><code>UIBarButtonItem *barButtonItem = [[UIBarButtonItem alloc] initWithCustomView:buttonItemView];
</code></pre>

And finally add barButtonItem to you navigation bar.

blocks|key|3127974|text|准确地说，这可以按如下方式完成|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3127975|[buttonItem+setTitleTextAttributes:[NSDictionary+dictionaryWithObjectsAndKeys:+
++++[UIFont+fontWithName:@"Helvetica-Bold"+size:26.0],+NSFontAttributeName,
++++[UIColor+greenColor],+NSForegroundColorAttributeName,
++++nil]+
++++++++++++++++++++++++++forState:UIControlStateNormal];|code-block|syntax|javascript|3127976|或者使用object字面语法：|3127977|[buttonItem+setTitleTextAttributes:@{
+++++NSFontAttributeName:+[UIFont+fontWithName:@"Helvetica-Bold"+size:26.0],
+++++NSForegroundColorAttributeName:+[UIColor+greenColor]
}+forState:UIControlStateNormal];|3127978|为了方便起见，下面是Swift的实现：|3127979|buttonItem.setTitleTextAttributes([
++++++++NSAttributedStringKey.font:+UIFont(name:+"Helvetica-Bold",+size:+26.0)!,
++++++++NSAttributedStringKey.foregroundColor:+UIColor.green],
++++for:+.normal)|3127980|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|S|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|U|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

To be precise, this can be done as below

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

Or with object literal syntax:

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

For convenience, here's the Swift implementation:

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

blocks|key|2913715|text|对于那些对在整个应用程序中使用UIAppearance来设置UIBarButtonItem字体样式感兴趣的人，可以使用下面这行代码来完成：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2913716|目标C:|BOLD|2913717|NSDictionary+*barButtonAppearanceDict+=+@{NSFontAttributeName+:+[UIFont+fontWithName:@"HelveticaNeue-Light"+size:12.0],+NSForegroundColorAttributeName:+[UIColor+whiteColor]};
[[UIBarButtonItem+appearance]+setTitleTextAttributes:barButtonAppearanceDict+forState:UIControlStateNormal];|code-block|syntax|javascript|2913718|Swift+2.3:|2913719|UIBarButtonItem.appearance().setTitleTextAttributes(
[
++++NSFontAttributeName+:+UIFont(name:+"HelveticaNeue-Light",+size:+12)!,
++++NSForegroundColorAttributeName+:+UIColor.white
],
for:+.normal)|2913720|Swift+3|2913721|UIBarButtonItem.appearance().setTitleTextAttributes(
[
++++NSFontAttributeName+:+UIFont(name:+"HelveticaNeue-Light",+size:+12)!,
++++NSForegroundColorAttributeName+:+UIColor.white,
],+for:+.normal)|2913722|Swift+4|2913723|UIBarButtonItem.appearance().setTitleTextAttributes(
[
++++NSAttributedStringKey.font+:+UIFont(name:+"HelveticaNeue-Light",+size:+12)!,
++++NSAttributedStringKey.foregroundColor+:+UIColor.white,
],+for:+.normal)|2913724|或者对于单个UIBarButtonItem+(不是所有的应用程序)，如果你有一个特别的按钮的自定义字体：|2913725|Swift+3|2913726|let+barButtonItem+=+UIBarButton()
barButtonItem.setTitleTextAttributes([
++++NSFontAttributeName+:+UIFont(name:+"FontAwesome",+size:+26)!,
++++NSForegroundColorAttributeName+:+UIColor.white,
],+for:+.normal)
barButtonItem.title+=+"\u{f02a}"|2913727|Swift+4|2913728|let+barButtonItem+=+UIBarButton()
barButtonItem.setTitleTextAttributes([
++++NSAttributedStringKey.font+:+UIFont(name:+"FontAwesome",+size:+26)!,
++++NSAttributedStringKey.foregroundColor+:+UIColor.white,
],+for:+.normal)
barButtonItem.title+=+"\u{f02a}"|2913729|当然，你可以随心所欲地改变字体和大小。我更喜欢将此代码放在didFinishLaunchingWithOptions部分的AppDelegate.m文件中。|2913730|可用属性(只需将它们添加到NSDictionary)：|2913731|使用UIFont|2913732|NSForegroundColorAttributeName：更改字体使用UIColor|unordered-list-item|2913733|
|2913734|NSShadow：更改颜色添加下拉阴影(参见NSShadow+class+reference)|2913735|2913736|(针对iOS7%2B更新)|2913737|entityMap|0|LINK|mutability|MUTABLE|url|https://developer.apple.com/library/ios/documentation/Cocoa/Reference/ApplicationKit/Classes/NSShadow_Class/^0|F|C|U|F|0|0|4|0|0|0|A|0|0|0|7|0|0|0|7|0|0|0|0|7|0|0|0|7|0|0|T|T|1P|D|0|D|C|0|2|6|0|0|U|11|7|0|0|0|8|M|8|M|P|0|0|0|0^^$0|@$1|2|3|4|5|6|7|1X|8|@$9|1Y|A|1Z|B|C]|$9|20|A|21|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|22|8|@$9|23|A|24|B|H]]|D|@]|E|$]]|$1|I|3|J|5|K|7|25|8|@]|D|@]|E|$L|M]]|$1|N|3|O|5|6|7|26|8|@$9|27|A|28|B|H]]|D|@]|E|$]]|$1|P|3|Q|5|K|7|29|8|@]|D|@]|E|$L|M]]|$1|R|3|S|5|6|7|2A|8|@$9|2B|A|2C|B|H]]|D|@]|E|$]]|$1|T|3|U|5|K|7|2D|8|@]|D|@]|E|$L|M]]|$1|V|3|W|5|6|7|2E|8|@$9|2F|A|2G|B|H]]|D|@]|E|$]]|$1|X|3|Y|5|K|7|2H|8|@]|D|@]|E|$L|M]]|$1|Z|3|10|5|6|7|2I|8|@]|D|@]|E|$]]|$1|11|3|12|5|6|7|2J|8|@$9|2K|A|2L|B|H]]|D|@]|E|$]]|$1|13|3|14|5|K|7|2M|8|@]|D|@]|E|$L|M]]|$1|15|3|16|5|6|7|2N|8|@$9|2O|A|2P|B|H]]|D|@]|E|$]]|$1|17|3|18|5|K|7|2Q|8|@]|D|@]|E|$L|M]]|$1|19|3|1A|5|6|7|2R|8|@$9|2S|A|2T|B|C]|$9|2U|A|2V|B|C]]|D|@]|E|$]]|$1|1B|3|1C|5|6|7|2W|8|@$9|2X|A|2Y|B|C]]|D|@]|E|$]]|$1|1D|3|1E|5|6|7|2Z|8|@$9|30|A|31|B|C]]|D|@]|E|$]]|$1|1F|3|1G|5|1H|7|32|8|@$9|33|A|34|B|C]|$9|35|A|36|B|C]]|D|@]|E|$]]|$1|1I|3|1J|5|6|7|37|8|@]|D|@]|E|$]]|$1|1K|3|1L|5|1H|7|38|8|@$9|39|A|3A|B|C]|$9|3B|A|3C|B|C]]|D|@$9|3D|A|3E|1|3F]]|E|$]]|$1|1M|3|-4|5|6|7|3G|8|@]|D|@]|E|$]]|$1|1N|3|1O|5|6|7|3H|8|@]|D|@]|E|$]]|$1|1P|3|-4|5|6|7|3I|8|@]|D|@]|E|$]]]|1Q|$1R|$5|1S|1T|1U|E|$1V|1W]]]]

For those interested in using <code>UIAppearance</code> to style their <code>UIBarButtonItem</code>'s fonts throughout the app, it can be accomplished using this line of code:

Objective C:

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

Swift 2.3:

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

Swift 3

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

Swift 4

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

Or for a single UIBarButtonItem (not for all app wide), if you have a custom font for one button in particular:

Swift 3

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

Swift 4

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

Of course, you can change the font &amp; size to whatever you'd like. I prefer to put this code in the <code>AppDelegate.m</code> file in the <code>didFinishLaunchingWithOptions</code> section.

Available attributes (just add them to the <code>NSDictionary</code>):

<ul>
<li><code>NSFontAttributeName</code>: Change font with a <code>UIFont</code></li>
<li><code>NSForegroundColorAttributeName</code>: Change color with a <code>UIColor</code></li>
<li><code>NSShadow</code>: Add a drop shadow (see <a href="https://developer.apple.com/library/ios/documentation/Cocoa/Reference/ApplicationKit/Classes/NSShadow_Class/" rel="noreferrer"><code>NSShadow</code> class reference)</a></li>
</ul>

(Updated for iOS7+)

blocks|key|3128043|text|要对某些UIBarButtonItems执行此操作，但不是全部，我建议使用以下方法。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3128044|3128045|创建一个UIBarButtonItem子类。不要向其添加任何内容-您将仅将其用作情节提要中的自定义类以及其外观代理...|ordered-list-item|3128046|在情节提要中，将所有所需UIBarButtonItems的自定义类更改为您AppDelegate中的子类|3128047|导入UIBarButtonItem子类并将以下行添加到application:didFinishLaunchingWithOptions:|3128048|3128049|在我的例子中，我将UIBarButtonItem子类化的唯一目的是使文本加粗：|3128050|[[BoldBarButtonItem+appearance]+setTitleTextAttributes:
++[NSDictionary+dictionaryWithObjectsAndKeys:+
++++[UIFont+boldSystemFontOfSize:18.0],+NSFontAttributeName,nil]+
++++++++++++++++++++++++++++++++++++++++++++++forState:UIControlStateNormal];|code-block|syntax|javascript|3128051|entityMap^0|4|G|0|0|4|F|0|C|G|0|2|F|R|16|0|0|9|F|0|0^^$0|@$1|2|3|4|5|6|7|X|8|@$9|Y|A|Z|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|10|8|@]|D|@]|E|$]]|$1|G|3|H|5|I|7|11|8|@$9|12|A|13|B|C]]|D|@]|E|$]]|$1|J|3|K|5|I|7|14|8|@$9|15|A|16|B|C]]|D|@]|E|$]]|$1|L|3|M|5|I|7|17|8|@$9|18|A|19|B|C]|$9|1A|A|1B|B|C]]|D|@]|E|$]]|$1|N|3|-4|5|6|7|1C|8|@]|D|@]|E|$]]|$1|O|3|P|5|6|7|1D|8|@$9|1E|A|1F|B|C]]|D|@]|E|$]]|$1|Q|3|R|5|S|7|1G|8|@]|D|@]|E|$T|U]]|$1|V|3|-4|5|6|7|1H|8|@]|D|@]|E|$]]]|W|$]]

To do this for some <code>UIBarButtonItems</code> but not all I recommend the following approach.

<ol>
<li>Create a <code>UIBarButtonItem</code> subclass. Don't add anything to it - you will only use it as a custom class in the storyboard and for its appearance proxy...</li>
<li>In your storyboard, change the custom class for all desired <code>UIBarButtonItems</code> to your subclass</li>
<li>In your AppDelegate import your <code>UIBarButtonItem</code> subclass and add the following line to <code>application:didFinishLaunchingWithOptions:</code></li>
</ol>

In my case I subclassed <code>UIBarButtonItem</code> for the sole purpose of bolding the text:

<pre><code>[[BoldBarButtonItem appearance] setTitleTextAttributes:
 [NSDictionary dictionaryWithObjectsAndKeys: 
 [UIFont boldSystemFontOfSize:18.0], NSFontAttributeName,nil] 
 forState:UIControlStateNormal];
</code></pre>

blocks|key|2913787|text|上面这些都是很好的答案。正在为iOS7更新：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2913788|NSDictionary+*barButtonAppearanceDict+=+@{NSFontAttributeName+:+[UIFont+fontWithName:@"HelveticaNeue-Thin"+size:18.0]+,+NSForegroundColorAttributeName:+[UIColor+whiteColor]};
++++[[UIBarButtonItem+appearance]+setTitleTextAttributes:barButtonAppearanceDict+forState:UIControlStateNormal];|code-block|syntax|javascript|2913789|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

These are great answers above. Just updating for iOS7:

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

blocks|key|245051|text|在Swift中，您可以按如下方式执行此操作：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|245052|backButtonItem.setTitleTextAttributes([
++++++++NSFontAttributeName+:+UIFont(name:+"Helvetica-Bold",+size:+26)!,
++++++++NSForegroundColorAttributeName+:+UIColor.blackColor()],
++++forState:+UIControlState.Normal)|code-block|syntax|javascript|245053|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

In Swift you would do this as followed:

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

blocks|key|3128070|text|Swift3|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|3128071|++buttonName.setAttributedTitle([
++++++++NSFontAttributeName+:+UIFont.systemFontOfSize(18.0),
++++++++NSForegroundColorAttributeName+:+UIColor.red,NSBackgroundColorAttributeName:UIColor.black],
+++++++++++++++++++++++++++++++++++++forState:+UIControlState.Normal)|code-block|syntax|javascript|3128072|swift|3128073|+++barbutton.setTitleTextAttributes([
++++++++NSFontAttributeName+:+UIFont.systemFontOfSize(18.0),
++++++++NSForegroundColorAttributeName+:+UIColor.redColor(),NSBackgroundColorAttributeName:UIColor.blackColor()],
++++++++forState:+UIControlState.Normal)|3128074|Objective-C|3128075|+++++[+barbutton+setTitleTextAttributes:[NSDictionary+dictionaryWithObjectsAndKeys:
++++++++[UIFont+fontWithName:@"Helvetica-Bold"+size:20.0],+NSFontAttributeName,
++++++++[UIColor+redColor],+NSForegroundColorAttributeName,[UIColor+blackColor],NSBackgroundColorAttributeName,
++++++++nil]
++++++++forState:UIControlStateNormal];|3128076|entityMap^0|0|6|0|0|0|5|0|0|0|B|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@$9|V|A|W|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|X|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|Y|8|@$9|Z|A|10|B|C]]|D|@]|E|$]]|$1|M|3|N|5|H|7|11|8|@]|D|@]|E|$I|J]]|$1|O|3|P|5|6|7|12|8|@$9|13|A|14|B|C]]|D|@]|E|$]]|$1|Q|3|R|5|H|7|15|8|@]|D|@]|E|$I|J]]|$1|S|3|-4|5|6|7|16|8|@]|D|@]|E|$]]]|T|$]]

Swift3

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

swift

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

Objective-C

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

blocks|key|240050|text|在整个应用中：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|240051|if+let+font+=+UIFont(name:+"AvenirNext-DemiBold",+size:+15)+{
++++++++UIBarButtonItem.appearance().setTitleTextAttributes([NSFontAttributeName:+font,NSForegroundColorAttributeName:TOOLBAR_TITLE_COLOR],+forState:+UIControlState.Normal)

++++}|code-block|syntax|javascript|240052|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Throughout App:

<pre><code>if let font = UIFont(name: "AvenirNext-DemiBold", size: 15) {
 UIBarButtonItem.appearance().setTitleTextAttributes([NSFontAttributeName: font,NSForegroundColorAttributeName:TOOLBAR_TITLE_COLOR], forState: UIControlState.Normal)

 }
</code></pre>

blocks|key|2913835|text|swift+3|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2913836|barButtonName.setTitleTextAttributes(+[NSFontAttributeName+:+UIFont.systemFont(ofSize:+18.0),NSForegroundColorAttributeName+:+UIColor.white],+for:+.normal)+|code-block|syntax|javascript|2913837|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

swift 3

<pre><code>barButtonName.setTitleTextAttributes( [NSFontAttributeName : UIFont.systemFont(ofSize: 18.0),NSForegroundColorAttributeName : UIColor.white], for: .normal) 
</code></pre>

blocks|key|240054|text|在Swift+4中，您可以通过添加以下代码来更改UIBarButtonItem的字体和颜色。|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|CODE|entityRanges|data|240055|addTodoBarButton.setTitleTextAttributes(
++++++++[
++++++++NSAttributedStringKey.font:+UIFont(name:+"HelveticaNeue-Bold",+size:+17)!,
++++++++NSAttributedStringKey.foregroundColor:+UIColor.black
++++++++],+for:+.normal)|code-block|syntax|javascript|240056|entityMap^0|1|7|O|F|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@$9|O|A|P|B|C]|$9|Q|A|R|B|D]]|E|@]|F|$]]|$1|G|3|H|5|I|7|S|8|@]|E|@]|F|$J|K]]|$1|L|3|-4|5|6|7|T|8|@]|E|@]|F|$]]]|M|$]]

In Swift 4, you can change the font and colour of <code>UIBarButtonItem</code> by adding the following code.

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

blocks|key|245067|text|这是正确的方法:声明您的barButtonItem+(在本例中为rightBarButtonItem)并添加setTitleTextAttributes。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|245068|navigationItem.rightBarButtonItem+=+UIBarButtonItem(title:+"Go!",+style:+.plain,+target:+self,+action:+#selector(yourFuncDestination))|code-block|syntax|javascript|245069|在添加标题属性之后|245070|navigationItem.rightBarButtonItem?.setTitleTextAttributes([.font+:+UIFont.systemFont(ofSize:+18,+weight:+.bold),+.foregroundColor+:+UIColor.white],+for:+.normal)|245071|您可以更改大小、权重(.bold、.heavy、.regular等)以及你喜欢的颜色。希望这能对您有所帮助:)|245072|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|S|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

This is the right way:
declare your barButtonItem (in this case rightBarButtonItem) and add it setTitleTextAttributes.

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

after you can add title attributes

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

you can change the size, the weight (.bold, .heavy, .regular etc.) and the color how you prefer...
Hope this help :)

blocks|key|2913892|text|为了完成，我想添加这个方法，2019年仍然在Objective-C中使用。:)|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2913893|_titleLabel+=+[[UILabel+alloc]+initWithFrame:CGRectZero];
_titleLabel.text+=+_titleBarButtonItem.title;
_titleLabel.textColor+=+UIColor.whiteColor;
_titleLabel.font+=+[UtilityMethods+appFontProDisplayBold:26.0];

[_titleLabel+sizeToFit];
UIBarButtonItem+*titleLabelItem+=+[[UIBarButtonItem+alloc]+initWithCustomView:_titleLabel];|code-block|syntax|javascript|2913894|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

For completion I would like to add this method, still used in Objective-C in 2019. :) 

<pre><code>_titleLabel = [[UILabel alloc] initWithFrame:CGRectZero];
_titleLabel.text = _titleBarButtonItem.title;
_titleLabel.textColor = UIColor.whiteColor;
_titleLabel.font = [UtilityMethods appFontProDisplayBold:26.0];

[_titleLabel sizeToFit];
UIBarButtonItem *titleLabelItem = [[UIBarButtonItem alloc] initWithCustomView:_titleLabel];
</code></pre>

blocks|key|3128142|text|Swift+5实现|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3128143|rightButtonItem.setTitleTextAttributes([
++++++++++++NSAttributedString.Key.font:+UIFont(name:+"Helvetica-Bold",+size:+26.0)!,
++++++++++++NSAttributedString.Key.foregroundColor:+UIColor.green],
++++++++for:+.normal)|code-block|syntax|javascript|3128144|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Swift 5 Implementation 

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

<img src="https://i.stack.imgur.com/EACXV.png" alt="UIToolbar with UIBarButtonItem">

I have a <code>UIBarButtonItem</code> in my <code>UIToolbar</code> titled Done. Now I want to change the font from the default to "Trebuchet MS" with Bold. How can I do that?

Change the font of a UIBarButtonItem

Objective-C

Swift

​​我的UIToolbar中有一个标题为Done的UIBarButtonItem。现在我想用粗体将字体从默认字体改为"Trebuchet MS"。我该怎么做呢？

问更改UIBarButtonItem的字体
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