blocks|key|586716|text|您可以在UILabel中添加UITapGestureRecognizer实例。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|586717|例如：|586718|UITapGestureRecognizer+*tapGestureRecognizer+=+[[UITapGestureRecognizer+alloc]+initWithTarget:self+action:@selector(labelTapped)];
tapGestureRecognizer.numberOfTapsRequired+=+1;
[myLabel+addGestureRecognizer:tapGestureRecognizer];
myLabel.userInteractionEnabled+=+YES;|code-block|syntax|javascript|586719|entityMap^0|E|M|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|R|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|S|8|@]|D|@]|E|$K|L]]|$1|M|3|-4|5|6|7|T|8|@]|D|@]|E|$]]]|N|$]]

You can add a <code>UITapGestureRecognizer</code> instance to your UILabel. 

For example:

<pre><code>UITapGestureRecognizer *tapGestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(labelTapped)];
tapGestureRecognizer.numberOfTapsRequired = 1;
[myLabel addGestureRecognizer:tapGestureRecognizer];
myLabel.userInteractionEnabled = YES;
</code></pre>

blocks|key|802786|text|如果你正在使用故事板，你可以在故事板中完成整个过程，而不需要额外的代码。向情节提要添加标签，然后向标签添加轻击手势。在Utilities窗格中，确保选中标签的"User+Interaction+Enabled“。从点击手势(在故事板中视图控制器的底部)，ctrl%2Bclick并拖动到ViewController.h文件并创建操作。然后在ViewController.m文件中实现该操作。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|802787|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

If you're using storyboards you can do this entire process in the storyboard with no additional code. Add a label to the storyboard, then add a tap gesture to the label. In the Utilities pane, make sure "User Interaction Enabled" is checked for the label. From the tap gesture (at the bottom of your view controller in the storyboard), ctrl+click and drag to your ViewController.h file and create an Action. Then implement the action in the ViewController.m file.

blocks|key|802715|text|您可以改为使用UIButton，并将文本设置为您想要的内容。如果你不想让按钮看起来像一个按钮，那么这个按钮不必看起来像一个按钮|type|unstyled|depth|inlineStyleRanges|entityRanges|data|802716|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

You could use a UIButton instead and set the text to what you want. The button doesn't have to look like a button if you don't want to

blocks|key|586836|text|如果你想在按钮中使用多行文本，那么创建一个带有多行文本的UILabel，并将其作为一个子视图添加到按钮中。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|586837|例如：|586838|yourLabel=[Uilabel+alloc]init];
yourLabel.frame=yourButtom.Frame;//(frame+size+should+be+equal+to+your+button's+frame)
[yourButton+addSubView:yourLabel]|code-block|syntax|javascript|586839|entityMap^0|S|7|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|R|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|S|8|@]|D|@]|E|$K|L]]|$1|M|3|-4|5|6|7|T|8|@]|D|@]|E|$]]]|N|$]]

If you want to use Multi line text in your button then create a <code>UILabel</code> with Multiline text and add as a subview in to your button.

for eg:

<pre><code>yourLabel=[Uilabel alloc]init];
yourLabel.frame=yourButtom.Frame;//(frame size should be equal to your button's frame)
[yourButton addSubView:yourLabel]
</code></pre>

blocks|key|802965|text|阿尔文·乔治的斯威夫特3|type|unstyled|depth|inlineStyleRanges|entityRanges|data|802966|override+func+viewDidLoad()+{
++++super.viewDidLoad()
++++let+newsString:+NSMutableAttributedString+=+NSMutableAttributedString(string:+"Tap+here+to+read+the+latest+Football+News.")
++++newsString.addAttributes([NSUnderlineStyleAttributeName:+NSUnderlineStyle.styleDouble.rawValue],+range:+NSMakeRange(4,+4))
++++sampleLabel.attributedText+=+newsString.copy()+as?+NSAttributedString

++++let+tapGesture:+UITapGestureRecognizer+=+UITapGestureRecognizer(target:+self,+action:+#selector(ViewController.tapResponse))
++++tapGesture.numberOfTapsRequired+=+1
++++sampleLabel.isUserInteractionEnabled+=++true
++++sampleLabel.addGestureRecognizer(tapGesture)
}

func+tapResponse(recognizer:+UITapGestureRecognizer)+{
++++print("tap")
}|code-block|syntax|javascript|802967|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 from Alvin George

<pre><code>override func viewDidLoad() {
 super.viewDidLoad()
 let newsString: NSMutableAttributedString = NSMutableAttributedString(string: "Tap here to read the latest Football News.")
 newsString.addAttributes([NSUnderlineStyleAttributeName: NSUnderlineStyle.styleDouble.rawValue], range: NSMakeRange(4, 4))
 sampleLabel.attributedText = newsString.copy() as? NSAttributedString

 let tapGesture: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(ViewController.tapResponse))
 tapGesture.numberOfTapsRequired = 1
 sampleLabel.isUserInteractionEnabled = true
 sampleLabel.addGestureRecognizer(tapGesture)
}

func tapResponse(recognizer: UITapGestureRecognizer) {
 print("tap")
}
</code></pre>

blocks|key|802813|text|Swift版本看起来像这样：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|802814|func+addGestureRecognizerLabel(){
++++//Create+a+instance,+in+this+case+I+used+UITapGestureRecognizer,
++++//in+the+docs+you+can+see+all+kinds+of+gestures
++++let+gestureRecognizer+=+UITapGestureRecognizer()

++++//Gesture+configuration
++++gestureRecognizer.numberOfTapsRequired+=+1
++++gestureRecognizer.numberOfTouchesRequired+=+1
++++/*Add+the+target+(You+can+use+UITapGestureRecognizer's+init()+for+this)
++++This+method+receives+two+arguments,+a+target(in+this+case+is+my+ViewController)+
++++and+the+callback,+or+function+that+you+want+to+invoke+when+the+user+tap+it+view)*/
++++gestureRecognizer.addTarget(self,+action:+"showDatePicker")

++++//Add+this+gesture+to+your+view,+and+"turn+on"+user+interaction
++++dateLabel.addGestureRecognizer(gestureRecognizer)
++++dateLabel.userInteractionEnabled+=+true
}

//How+you+can+see,+this+function+is+my+"callback"
func+showDatePicker(){
++++//Your+code+here
++++print("Hi,+was+clicked")
}

//To+end+just+invoke+to+addGestureRecognizerLabel()+when
//your+viewDidLoad()+method+is+called

override+func+viewDidLoad()+{
++++super.viewDidLoad()
++++addGestureRecognizerLabel()
}|code-block|syntax|javascript|802815|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 version looks like this:

<pre><code>func addGestureRecognizerLabel(){
 //Create a instance, in this case I used UITapGestureRecognizer,
 //in the docs you can see all kinds of gestures
 let gestureRecognizer = UITapGestureRecognizer()

 //Gesture configuration
 gestureRecognizer.numberOfTapsRequired = 1
 gestureRecognizer.numberOfTouchesRequired = 1
 /*Add the target (You can use UITapGestureRecognizer's init() for this)
 This method receives two arguments, a target(in this case is my ViewController) 
 and the callback, or function that you want to invoke when the user tap it view)*/
 gestureRecognizer.addTarget(self, action: "showDatePicker")

 //Add this gesture to your view, and "turn on" user interaction
 dateLabel.addGestureRecognizer(gestureRecognizer)
 dateLabel.userInteractionEnabled = true
}

//How you can see, this function is my "callback"
func showDatePicker(){
 //Your code here
 print("Hi, was clicked")
}

//To end just invoke to addGestureRecognizerLabel() when
//your viewDidLoad() method is called

override func viewDidLoad() {
 super.viewDidLoad()
 addGestureRecognizerLabel()
}
</code></pre>

blocks|key|802996|text|我个人更喜欢为UILabel编写扩展的方法。这就是我所使用的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|802997|import+UIKit

extension+UILabel+{
++++/**
+++++*+A+map+of+actions,+mapped+as+[+instanceIdentifier+:+action+].
+++++*/
++++private+static+var+_tapHandlers+=+[String:(()->Void)]()

++++/**
+++++*+Retrieve+the+address+for+this+UILabel+as+a+String.
+++++*/
++++private+func+getAddressAsString()+->+String+{
++++++++let+addr+=+Unmanaged.passUnretained(self).toOpaque()
++++++++return+"\(addr)"
++++}

++++/**
+++++*+Set+the+on+tapped+event+for+the+label
+++++*/
++++func+setOnTapped(_+handler:+@escaping+(()->Void))+{
++++++++UILabel._tapHandlers[getAddressAsString()]+=+handler
++++++++let+gr+=+UITapGestureRecognizer(target:+self,+action:+#selector(onTapped))
++++++++gr.numberOfTapsRequired+=+1
++++++++self.addGestureRecognizer(gr)
++++++++self.isUserInteractionEnabled+=+true
++++}

++++/**
+++++*+Handle+the+tap+event.
+++++*/
++++@objc+private+func+onTapped()+{
++++++++UILabel._tapHandlers[self.getAddressAsString()]?()
++++}
}|code-block|syntax|javascript|802998|然后，您可以在任何UILabel实例中像这样使用它：|802999|myLabel.setOnTapped+{
++++//+do+something
}|803000|我认为这可能会导致一些内存泄漏，但我还没有确定如何最好地解决它们。|803001|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|$]]

I personally prefer the method of writing an extension for UILabel. This is what I use.

<pre class="lang-swift prettyprint-override"><code>import UIKit

extension UILabel {
 /**
 * A map of actions, mapped as [ instanceIdentifier : action ].
 */
 private static var _tapHandlers = [String:(()-&gt;Void)]()

 /**
 * Retrieve the address for this UILabel as a String.
 */
 private func getAddressAsString() -&gt; String {
 let addr = Unmanaged.passUnretained(self).toOpaque()
 return "\(addr)"
 }

 /**
 * Set the on tapped event for the label
 */
 func setOnTapped(_ handler: @escaping (()-&gt;Void)) {
 UILabel._tapHandlers[getAddressAsString()] = handler
 let gr = UITapGestureRecognizer(target: self, action: #selector(onTapped))
 gr.numberOfTapsRequired = 1
 self.addGestureRecognizer(gr)
 self.isUserInteractionEnabled = true
 }

 /**
 * Handle the tap event.
 */
 @objc private func onTapped() {
 UILabel._tapHandlers[self.getAddressAsString()]?()
 }
}
</code></pre>

You would then use it like this from any UILabel instance:

<pre class="lang-swift prettyprint-override"><code>myLabel.setOnTapped {
 // do something
}
</code></pre>

This can potentially cause some memory leaks I believe, but I haven't determined how best to resolve them yet.

I have discovered that I can create UILabel much faster than UITextField and I plan to use UILabel most of the time for my data display app.

To make a long story short though, I wish to let the user tap on a UILabel and have my callback respond to that. Is that possible?

Thanks.

How to get UILabel to respond to tap?

Swift

我发现我创建UILabel的速度比UITextField快得多，而且我计划大部分时间都使用UILabel开发我的数据显示应用程序。长话短说，我希望让用户点击一个UILabel，并让我的回调对此作出响应。这有可能吗？谢谢。

问如何让UILabel响应tap？
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