blocks|key|4402552|text|虽然有一个解决方案，但它有一些已知的问题|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4402553|解决方案是编写如下所示的函数|4402554|func+setTitle(title:String,+subtitle:String)+->+UIView+{
++++let+titleLabel+=+UILabel(frame:+CGRectMake(0,+-2,+0,+0))

++++titleLabel.backgroundColor+=+UIColor.clearColor()
++++titleLabel.textColor+=+UIColor.grayColor()
++++titleLabel.font+=+UIFont.boldSystemFontOfSize(17)
++++titleLabel.text+=+title
++++titleLabel.sizeToFit()

++++let+subtitleLabel+=+UILabel(frame:+CGRectMake(0,+18,+0,+0))
++++subtitleLabel.backgroundColor+=+UIColor.clearColor()
++++subtitleLabel.textColor+=+UIColor.blackColor()
++++subtitleLabel.font+=+UIFont.systemFontOfSize(12)
++++subtitleLabel.text+=+subtitle
++++subtitleLabel.sizeToFit()

++++let+titleView+=+UIView(frame:+CGRectMake(0,+0,+max(titleLabel.frame.size.width,+subtitleLabel.frame.size.width),+30))
++++titleView.addSubview(titleLabel)
++++titleView.addSubview(subtitleLabel)

++++let+widthDiff+=+subtitleLabel.frame.size.width+-+titleLabel.frame.size.width

++++if+widthDiff+<+0+{
++++++++let+newX+=+widthDiff+/+2
++++++++subtitleLabel.frame.origin.x+=+abs(newX)
++++}+else+{
++++++++let+newX+=+widthDiff+/+2
++++++++titleLabel.frame.origin.x+=+newX
++++}

++++return+titleView
}|code-block|syntax|javascript|4402555|将此函数用于viewDidLoad中的自定义导航标题视图|offset|length|style|CODE|4402556|self.navigationItem.titleView+=+setTitle("Title",+subtitle:+"SubTitle")|4402557|唯一已知的问题是，如果字幕变得非常大，就会出现错位。|4402558|最终结果|4402559|📷|atomic|4402560|​|4402561|来源：https://gist.github.com/nazywamsiepawel/0166e8a71d74e96c7898|4402562|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/e5cf709974a343721155bbe265eb94a5.png|imageAlt|1|LINK|MUTABLE|url|https://gist.github.com/nazywamsiepawel/0166e8a71d74e96c7898^0|0|0|0|6|B|0|0|0|0|0|1|0|0|0|3|1O|1|0^^$0|@$1|2|3|4|5|6|7|1F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|1G|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|1H|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|1I|8|@$K|1J|L|1K|M|N]]|9|@]|A|$]]|$1|O|3|P|5|F|7|1L|8|@]|9|@]|A|$G|H]]|$1|Q|3|R|5|6|7|1M|8|@]|9|@]|A|$]]|$1|S|3|T|5|6|7|1N|8|@]|9|@]|A|$]]|$1|U|3|V|5|W|7|1O|8|@]|9|@$K|1P|L|1Q|1|1R]]|A|$]]|$1|X|3|Y|5|6|7|1S|8|@]|9|@]|A|$]]|$1|Z|3|10|5|6|7|1T|8|@]|9|@$K|1U|L|1V|1|1W]]|A|$]]|$1|11|3|-4|5|6|7|1X|8|@]|9|@]|A|$]]]|12|$13|$5|14|15|16|A|$17|18|19|-4]]|1A|$5|1B|15|1C|A|$1D|1E]]]]

Though there is a solution but it has some known issues

Solution is writing a function like this

<pre><code>func setTitle(title:String, subtitle:String) -&gt; UIView {
 let titleLabel = UILabel(frame: CGRectMake(0, -2, 0, 0))

 titleLabel.backgroundColor = UIColor.clearColor()
 titleLabel.textColor = UIColor.grayColor()
 titleLabel.font = UIFont.boldSystemFontOfSize(17)
 titleLabel.text = title
 titleLabel.sizeToFit()

 let subtitleLabel = UILabel(frame: CGRectMake(0, 18, 0, 0))
 subtitleLabel.backgroundColor = UIColor.clearColor()
 subtitleLabel.textColor = UIColor.blackColor()
 subtitleLabel.font = UIFont.systemFontOfSize(12)
 subtitleLabel.text = subtitle
 subtitleLabel.sizeToFit()

 let titleView = UIView(frame: CGRectMake(0, 0, max(titleLabel.frame.size.width, subtitleLabel.frame.size.width), 30))
 titleView.addSubview(titleLabel)
 titleView.addSubview(subtitleLabel)

 let widthDiff = subtitleLabel.frame.size.width - titleLabel.frame.size.width

 if widthDiff &lt; 0 {
 let newX = widthDiff / 2
 subtitleLabel.frame.origin.x = abs(newX)
 } else {
 let newX = widthDiff / 2
 titleLabel.frame.origin.x = newX
 }

 return titleView
}
</code></pre>

Using this function for custom navigation title view in <code>viewDidLoad</code>

<pre><code>self.navigationItem.titleView = setTitle("Title", subtitle: "SubTitle")
</code></pre>

Only known issue is that if subtitle becomes very large than the misplacement occurs.

Final Outcome
<a href="https://i.stack.imgur.com/Wln8c.png" rel="noreferrer"><img src="https://i.stack.imgur.com/Wln8c.png" alt="enter image description here"></a>

Source: <a href="https://gist.github.com/nazywamsiepawel/0166e8a71d74e96c7898" rel="noreferrer">https://gist.github.com/nazywamsiepawel/0166e8a71d74e96c7898</a>

blocks|key|4402780|text|感谢你的回答！@RajanMaheshwari|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4402781|除了使用widthDiff编写的if语句之外，您的代码运行得很好。|4402782|我稍微调整了一下，一切都很顺利。|4402783|if+widthDiff+<+0+{
++++++++let+newX+=+widthDiff+/+2
++++++++subtitleLabel.frame.origin.x+=+abs(newX)
++++}+else+{
++++++++let+newX+=+widthDiff+/+2
++++++++titleLabel.frame.origin.x+=+newX
++++}|code-block|syntax|javascript|4402784|再次感谢您的回复！|4402785|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|Q|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|R|8|@]|9|@]|A|$I|J]]|$1|K|3|L|5|6|7|S|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

Thanks a lot for your answer! @RajanMaheshwari 

Your coding worked perfectly except the if statement you made with the widthDiff..

I adjusted it a little bit and everything worked smoothly.

<pre><code>if widthDiff &lt; 0 {
 let newX = widthDiff / 2
 subtitleLabel.frame.origin.x = abs(newX)
 } else {
 let newX = widthDiff / 2
 titleLabel.frame.origin.x = newX
 }
</code></pre>

Thanks again for your response!

blocks|key|4402809|text|这是我在扩展上使用堆栈视图的版本。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4402810|extension+UINavigationItem+{
++++func+setTitle(title:String,+subtitle:String)+{
++++++++
++++++++let+one+=+UILabel()
++++++++one.text+=+title
++++++++one.font+=+UIFont.systemFont(ofSize:+17)
++++++++one.sizeToFit()
++++++++
++++++++let+two+=+UILabel()
++++++++two.text+=+subtitle
++++++++two.font+=+UIFont.systemFont(ofSize:+12)
++++++++two.textAlignment+=+.center
++++++++two.sizeToFit()
++++++++
++++++++let+stackView+=+UIStackView(arrangedSubviews:+[one,+two])
++++++++stackView.distribution+=+.equalCentering
++++++++stackView.axis+=+.vertical
++++++++stackView.alignment+=+.center
++++++++
++++++++let+width+=+max(one.frame.size.width,+two.frame.size.width)
++++++++stackView.frame+=+CGRect(x:+0,+y:+0,+width:+width,+height:+35)
++++++++
++++++++one.sizeToFit()
++++++++two.sizeToFit()
++++++++
++++++++self.titleView+=+stackView
++++}
}|code-block|syntax|javascript|4402811|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|$]]

Here is my version using a stack view on an extension.
<pre><code>extension UINavigationItem {
 func setTitle(title:String, subtitle:String) {
 
 let one = UILabel()
 one.text = title
 one.font = UIFont.systemFont(ofSize: 17)
 one.sizeToFit()
 
 let two = UILabel()
 two.text = subtitle
 two.font = UIFont.systemFont(ofSize: 12)
 two.textAlignment = .center
 two.sizeToFit()
 
 let stackView = UIStackView(arrangedSubviews: [one, two])
 stackView.distribution = .equalCentering
 stackView.axis = .vertical
 stackView.alignment = .center
 
 let width = max(one.frame.size.width, two.frame.size.width)
 stackView.frame = CGRect(x: 0, y: 0, width: width, height: 35)
 
 one.sizeToFit()
 two.sizeToFit()
 
 self.titleView = stackView
 }
}
</code></pre>

blocks|key|4402659|text|感谢您的回答@RajanMaheshwari|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4402660|如果有人遇到当副标题文本比标题文本更长时标题不对齐的问题，我在上面subtitleLabel实例化位置下面的Rajan的答案中添加了以下代码：|4402661|//+Fix+incorrect+width+bug
if+(subtitleLabel.frame.size.width+>+titleLabel.frame.size.width)+{
++++var+titleFrame+=+titleLabel.frame
++++titleFrame.size.width+=+subtitleLabel.frame.size.width
++++titleLabel.frame+=+titleFrame
++++titleLabel.textAlignment+=+.center
}|code-block|syntax|javascript|4402662|我希望这能帮助和我一样遇到同样问题的人|4402663|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|O|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|P|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

Thanks for the answer @RajanMaheshwari

If anyone is having the issue where the title becomes misaligned when the subtitle text is longer than the title text, I added the following code to the Rajan's answer above just below where the subtitleLabel is instantiated:

<pre><code>// Fix incorrect width bug
if (subtitleLabel.frame.size.width &gt; titleLabel.frame.size.width) {
 var titleFrame = titleLabel.frame
 titleFrame.size.width = subtitleLabel.frame.size.width
 titleLabel.frame = titleFrame
 titleLabel.textAlignment = .center
}
</code></pre>

Hope this helps someone who encountered the same issue as me

blocks|key|4402849|text|如果任何人正在寻找上面提到的解决方案的Objective-C代码：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4402850|+++UILabel+*title+=+[[UILabel+alloc]init];
+++UILabel+*subtitle+=+[[UILabel+alloc]init];

+++[title+setFont:[UIFont+systemFontOfSize:12]];
+++[title+setTextColor:[UIColor+whiteColor]];
+++[title+setFont:[UIFont+systemFontOfSize:17]];
+++[title+sizeToFit];
+++title.text+=+@"Title";

+++[subtitle+setTextColor:[UIColor+whiteColor]];
+++[subtitle+setFont:[UIFont+systemFontOfSize:12]];
+++[subtitle+setTextAlignment:NSTextAlignmentCenter];
+++[subtitle+sizeToFit];
+++subtitle.text+=+@"Subtitle+Title";

+++UIStackView+*stackVw+=+[[UIStackView+alloc]initWithArrangedSubviews:@[title,subtitle]];
+++stackVw.distribution+=+UIStackViewDistributionEqualCentering;
+++stackVw.axis+=+UILayoutConstraintAxisVertical;
+++stackVw.alignment+=UIStackViewAlignmentCenter;


+++[stackVw+setFrame:CGRectMake(0,+0,+MAX(title.frame.size.width,+subtitle.frame.size.width),+35)];
+++self.navigationItem.titleView+=+stackVw;|code-block|syntax|javascript|4402851|entityMap^0|J|B|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

In case anyone looking for <code>Objective-C</code> code of the above mentioned solution:

<pre><code> UILabel *title = [[UILabel alloc]init];
 UILabel *subtitle = [[UILabel alloc]init];

 [title setFont:[UIFont systemFontOfSize:12]];
 [title setTextColor:[UIColor whiteColor]];
 [title setFont:[UIFont systemFontOfSize:17]];
 [title sizeToFit];
 title.text = @"Title";

 [subtitle setTextColor:[UIColor whiteColor]];
 [subtitle setFont:[UIFont systemFontOfSize:12]];
 [subtitle setTextAlignment:NSTextAlignmentCenter];
 [subtitle sizeToFit];
 subtitle.text = @"Subtitle Title";

 UIStackView *stackVw = [[UIStackView alloc]initWithArrangedSubviews:@[title,subtitle]];
 stackVw.distribution = UIStackViewDistributionEqualCentering;
 stackVw.axis = UILayoutConstraintAxisVertical;
 stackVw.alignment =UIStackViewAlignmentCenter;


 [stackVw setFrame:CGRectMake(0, 0, MAX(title.frame.size.width, subtitle.frame.size.width), 35)];
 self.navigationItem.titleView = stackVw;
</code></pre>

blocks|key|4402892|text|我真的很喜欢@user2325031的答案，但我发现不需要调整标签的大小来适应和设置框架。根据@GerardoMR的建议，我还将stackView的对齐方式设置为.center。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4402893|extension+UINavigationItem+{

++++func+setTitle(_+title:+String,+subtitle:+String)+{
++++++++let+titleLabel+=+UILabel()
++++++++titleLabel.text+=+title
++++++++titleLabel.font+=+.systemFont(ofSize:+17.0)
++++++++titleLabel.textColor+=+.black

++++++++let+subtitleLabel+=+UILabel()
++++++++subtitleLabel.text+=+subtitle
++++++++subtitleLabel.font+=+.systemFont(ofSize:+12.0)
++++++++subtitleLabel.textColor+=+.gray

++++++++let+stackView+=+UIStackView(arrangedSubviews:+[titleLabel,+subtitleLabel])
++++++++stackView.distribution+=+.equalCentering
++++++++stackView.alignment+=+.center
++++++++stackView.axis+=+.vertical

++++++++self.titleView+=+stackView
++++}

}|code-block|syntax|javascript|4402894|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|$]]

I really liked @user2325031's answer, but found that sizing the labels to fit and setting the frame wasn't needed. I also set the stackView's alignment to .center per @GerardoMR's suggestion.

<pre><code>extension UINavigationItem {

 func setTitle(_ title: String, subtitle: String) {
 let titleLabel = UILabel()
 titleLabel.text = title
 titleLabel.font = .systemFont(ofSize: 17.0)
 titleLabel.textColor = .black

 let subtitleLabel = UILabel()
 subtitleLabel.text = subtitle
 subtitleLabel.font = .systemFont(ofSize: 12.0)
 subtitleLabel.textColor = .gray

 let stackView = UIStackView(arrangedSubviews: [titleLabel, subtitleLabel])
 stackView.distribution = .equalCentering
 stackView.alignment = .center
 stackView.axis = .vertical

 self.titleView = stackView
 }

}
</code></pre>

blocks|key|4402755|text|Swift+4：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4402756|import+UIKit

class+NavigationTitleView:+UIView+{

++++private+var+contentStackView+=+UIStackView()
++++private+var+titleLabel+=+UILabel()
++++private+var+subTitleLabel+=+UILabel()

++++override+init(frame:+CGRect)+{
++++++++super.init(frame:+frame)

++++++++viewConfig()
++++++++addViewsConfig()
++++++++layoutViewsConfig()

++++}

++++required+init?(coder+aDecoder:+NSCoder)+{
++++++++fatalError("init(coder:)+has+not+been+implemented")
++++}


++++func+set(title:+String,+subTitle:+String){

++++++++self.titleLabel.text+=+title
++++++++self.subTitleLabel.text+=+subTitle

++++}

++++private+func+viewConfig()+{

++++++++contentStackView.axis+=+.vertical
++++++++contentStackView.alignment+=+.center
++++++++contentStackView.distribution++=+.fill
++++++++contentStackView.spacing+=+5


++++++++self.backgroundColor+=+.clear
++++++++self.titleLabel.textColor+=+.white
++++++++self.self.subTitleLabel.textColor+=+.white

++++}

++++private+func+addViewsConfig()+{

++++++++contentStackView.addArrangedSubview(subTitleLabel)
++++++++contentStackView.addArrangedSubview(titleLabel)
++++++++self.addSubview(contentStackView)

++++}

++++private+func+layoutViewsConfig(){

++++++++contentStackView.translatesAutoresizingMaskIntoConstraints+=+false
++++++++contentStackView.centerXAnchor.constraint(equalTo:+self.centerXAnchor,+constant:+0.0).isActive+=+true
++++++++contentStackView.centerYAnchor.constraint(equalTo:+self.centerYAnchor,+constant:+0.0).isActive+=+true

++++}

}|code-block|syntax|javascript|4402757|使用：|4402758|import+UIKit

class++ViewController:+UIViewController+{

++++private+var+navigationTitleView+=+NavigationTitleView()

++++override+func+viewDidLoad()+{
++++++++super.viewDidLoad()

++++++++self.navigationItem.titleView+=+navigationTitleView
++++++++navigationTitleView.set(title:+"title",+subTitle:+"subTitle")

++++}

}|4402759|​|4402760|📷|atomic|offset|length|4402761|4402762|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/0fce599fddf4335845f5a6241c1625b2.jpeg|imageAlt^0|0|0|0|0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|11|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|12|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|13|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|14|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|15|8|@]|9|@]|A|$]]|$1|M|3|N|5|O|7|16|8|@]|9|@$P|17|Q|18|1|19]]|A|$]]|$1|R|3|L|5|6|7|1A|8|@]|9|@]|A|$]]|$1|S|3|-4|5|6|7|1B|8|@]|9|@]|A|$]]]|T|$U|$5|V|W|X|A|$Y|Z|10|-4]]]]

Swift 4:

<pre><code>import UIKit

class NavigationTitleView: UIView {

 private var contentStackView = UIStackView()
 private var titleLabel = UILabel()
 private var subTitleLabel = UILabel()

 override init(frame: CGRect) {
 super.init(frame: frame)

 viewConfig()
 addViewsConfig()
 layoutViewsConfig()

 }

 required init?(coder aDecoder: NSCoder) {
 fatalError("init(coder:) has not been implemented")
 }


 func set(title: String, subTitle: String){

 self.titleLabel.text = title
 self.subTitleLabel.text = subTitle

 }

 private func viewConfig() {

 contentStackView.axis = .vertical
 contentStackView.alignment = .center
 contentStackView.distribution = .fill
 contentStackView.spacing = 5


 self.backgroundColor = .clear
 self.titleLabel.textColor = .white
 self.self.subTitleLabel.textColor = .white

 }

 private func addViewsConfig() {

 contentStackView.addArrangedSubview(subTitleLabel)
 contentStackView.addArrangedSubview(titleLabel)
 self.addSubview(contentStackView)

 }

 private func layoutViewsConfig(){

 contentStackView.translatesAutoresizingMaskIntoConstraints = false
 contentStackView.centerXAnchor.constraint(equalTo: self.centerXAnchor, constant: 0.0).isActive = true
 contentStackView.centerYAnchor.constraint(equalTo: self.centerYAnchor, constant: 0.0).isActive = true

 }

}
</code></pre>

Use:

<pre><code>import UIKit

class ViewController: UIViewController {

 private var navigationTitleView = NavigationTitleView()

 override func viewDidLoad() {
 super.viewDidLoad()

 self.navigationItem.titleView = navigationTitleView
 navigationTitleView.set(title: "title", subTitle: "subTitle")

 }

}
</code></pre>

<a href="https://i.stack.imgur.com/NXoyf.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/NXoyf.jpg" alt="enter image description here"></a>

blocks|key|4402772|text|@iosjillian的Swift+4扩展效果很好，添加了更多的扩展来尊重工具栏的外观和用户字体首选项：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4402773|import+UIKit

extension+UINavigationItem+{

++func+setTitle(_+title:+String,+subtitle:+String)+{
++++let+appearance+=+UINavigationBar.appearance()
++++let+textColor+=+appearance.titleTextAttributes?[NSAttributedString.Key.foregroundColor]+as?+UIColor+??+.black

++++let+titleLabel+=+UILabel()
++++titleLabel.text+=+title
++++titleLabel.font+=+.preferredFont(forTextStyle:+UIFont.TextStyle.headline)
++++titleLabel.textColor+=+textColor

++++let+subtitleLabel+=+UILabel()
++++subtitleLabel.text+=+subtitle
++++subtitleLabel.font+=+.preferredFont(forTextStyle:+UIFont.TextStyle.subheadline)
++++subtitleLabel.textColor+=+textColor.withAlphaComponent(0.75)

++++let+stackView+=+UIStackView(arrangedSubviews:+[titleLabel,+subtitleLabel])
++++stackView.distribution+=+.equalCentering
++++stackView.alignment+=+.center
++++stackView.axis+=+.vertical

++++self.titleView+=+stackView
++}
}|code-block|syntax|javascript|4402774|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|$]]

@iosjillian's Swift 4 extension works great, adding a bit more to honor the bar's appearance and user font preferences:

<pre><code>import UIKit

extension UINavigationItem {

 func setTitle(_ title: String, subtitle: String) {
 let appearance = UINavigationBar.appearance()
 let textColor = appearance.titleTextAttributes?[NSAttributedString.Key.foregroundColor] as? UIColor ?? .black

 let titleLabel = UILabel()
 titleLabel.text = title
 titleLabel.font = .preferredFont(forTextStyle: UIFont.TextStyle.headline)
 titleLabel.textColor = textColor

 let subtitleLabel = UILabel()
 subtitleLabel.text = subtitle
 subtitleLabel.font = .preferredFont(forTextStyle: UIFont.TextStyle.subheadline)
 subtitleLabel.textColor = textColor.withAlphaComponent(0.75)

 let stackView = UIStackView(arrangedSubviews: [titleLabel, subtitleLabel])
 stackView.distribution = .equalCentering
 stackView.alignment = .center
 stackView.axis = .vertical

 self.titleView = stackView
 }
}
</code></pre>

So I'm wanting to add a "subtitle" under the title in the navigation bar in navigation controller.

Mostly everything I look up so far wants me to use CGRect. I don't know a whole lot what that is and it sounds like its wanting me to create an entire new view which is not what I am wanting to do.

My question is, is there a dot method to adding a subtitle view easily?

The closest thing I found was posted on stack overflow and here is the link:

<a href="https://stackoverflow.com/questions/29626710/create-a-subtitle-in-navigationbar">Create a subtitle in navigationbar</a>

Apparently last year this worked but now I am getting errors and it's in my viewDidLoad...

I tried this:

self.navigationController?.navigationItem.prompt = "Subtitle Here"

It's the only thing that won't show any errors but still doesn't work. It literally does nothing. At least nothing visible at run time.

On a side note, swift is preferred. Thanks!

Add subtitle under the title in navigation bar controller in Xcode

Objective-C

Swift

所以我想在导航控制器的导航栏的标题下添加一个“副标题”。到目前为止，我查找的大多数内容都希望我使用CGRect。我不知道这是什么，听起来它想让我创建一个全新的视图，而这并不是我想要做的。我的问题是，有没有一个点方法可以轻松地添加字幕视图？我找到的最接近的东西是发布在stack overflow上的，这里是链接：很明显，...

问在Xcode的导航栏控制器中的标题下添加副标题
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问在Xcode的导航栏控制器中的标题下添加副标题
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