如何制作URL /电话可点击的UILabel？

时间：2012-05-21 08:39:52

标签： iphone objective-c url uilabel

我想在我的应用上创建一个可点击标签，引导我访问Safari网页。我还希望用户只能通过点击来拨打电话号码？

感谢您的建议

11 个答案:

答案 0 :(得分：125)

您可以使用UITextView并在检查器中选择检测链接，电话号码和其他内容。

答案 1 :(得分：93)

使用UITextView代替UILabel，它有一个属性可以将文本转换为超链接。

目标C：

yourTextView.editable = NO;
yourTextView.dataDetectorTypes = UIDataDetectorTypeAll;

夫特：

yourTextView.editable = false; 
yourTextView.dataDetectorTypes = UIDataDetectorTypes.All;

这将自动检测链接。

有关详细信息，请参阅the documentation。

答案 2 :(得分：27)

https://github.com/mattt/TTTAttributedLabel

这绝对是你需要的。您还可以为标签应用属性，例如下划线，并为其应用不同的颜色。只需查看可点击网址的说明。

主要是，您执行以下操作：

NSRange range = [label.text rangeOfString:@"me"];
[label addLinkToURL:[NSURL URLWithString:@"http://github.com/mattt/"] withRange:range]; // Embedding a custom link in a substring

答案 3 :(得分：12)

您可以自定义UIButton和setText，并添加方法。

    UIButton *sampleButton = [UIButton buttonWithType:UIButtonTypeCustom];
    [sampleButton setFrame:CGRectMake(kLeftMargin, 10, self.view.bounds.size.width - kLeftMargin - kRightMargin, 52)];
    [sampleButton setTitle:@"URL Text" forState:UIControlStateNormal];
    [sampleButton setFont:[UIFont boldSystemFontOfSize:20]];

    [sampleButton addTarget:self action:@selector(buttonPressed) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:sampleButton];

-(void)buttonPressed:(id)sender{
 // open url

}

答案 4 :(得分：8)

如果你想让它由UILabel而不是UITextView处理，你可以创建UILabel子类，就像这样：

class LinkedLabel: UILabel {

fileprivate let layoutManager = NSLayoutManager()
fileprivate let textContainer = NSTextContainer(size: CGSize.zero)
fileprivate var textStorage: NSTextStorage?


override init(frame aRect:CGRect){
    super.init(frame: aRect)
    self.initialize()
}

required init?(coder aDecoder: NSCoder) {
    super.init(coder: aDecoder)
    self.initialize()
}

func initialize(){

    let tap = UITapGestureRecognizer(target: self, action: #selector(LinkedLabel.handleTapOnLabel))
    self.isUserInteractionEnabled = true
    self.addGestureRecognizer(tap)
}

override var attributedText: NSAttributedString?{
    didSet{
        if let _attributedText = attributedText{
            self.textStorage = NSTextStorage(attributedString: _attributedText)

            self.layoutManager.addTextContainer(self.textContainer)
            self.textStorage?.addLayoutManager(self.layoutManager)

            self.textContainer.lineFragmentPadding = 0.0;
            self.textContainer.lineBreakMode = self.lineBreakMode;
            self.textContainer.maximumNumberOfLines = self.numberOfLines;
        }

    }
}

func handleTapOnLabel(tapGesture:UITapGestureRecognizer){

    let locationOfTouchInLabel = tapGesture.location(in: tapGesture.view)
    let labelSize = tapGesture.view?.bounds.size
    let textBoundingBox = self.layoutManager.usedRect(for: self.textContainer)
    let textContainerOffset = CGPoint(x: ((labelSize?.width)! - textBoundingBox.size.width) * 0.5 - textBoundingBox.origin.x, y: ((labelSize?.height)! - textBoundingBox.size.height) * 0.5 - textBoundingBox.origin.y)

    let locationOfTouchInTextContainer = CGPoint(x: locationOfTouchInLabel.x - textContainerOffset.x, y: locationOfTouchInLabel.y - textContainerOffset.y)
    let indexOfCharacter = self.layoutManager.characterIndex(for: locationOfTouchInTextContainer, in: self.textContainer, fractionOfDistanceBetweenInsertionPoints: nil)


    self.attributedText?.enumerateAttribute(NSLinkAttributeName, in: NSMakeRange(0, (self.attributedText?.length)!), options: NSAttributedString.EnumerationOptions(rawValue: UInt(0)), using:{
        (attrs: Any?, range: NSRange, stop: UnsafeMutablePointer<ObjCBool>) in

        if NSLocationInRange(indexOfCharacter, range){
            if let _attrs = attrs{

                UIApplication.shared.openURL(URL(string: _attrs as! String)!)
            }
        }
    })

}}

此类是通过重用此answer中的代码制作的。要生成属性字符串，请查看此answer。 here您可以找到如何制作电话网址。

答案 5 :(得分：7)

使用UITextView代替UILabel，它有一个属性可以将文本转换为超链接

Swift代码：

yourTextView.editable = false
yourTextView.dataDetectorTypes = UIDataDetectorTypes.All
//or
yourTextView.dataDetectorTypes = UIDataDetectorTypes.PhoneNumber
//or
yourTextView.dataDetectorTypes = UIDataDetectorTypes.Link

答案 6 :(得分：6)

使用此我非常喜欢它，因为只为特定文字创建蓝色链接而不是整个标签文本：FRHyperLabel

Smartly applying hyperlink on Terms of Use

待办事项：

  1. 从上方链接下载并将FRHyperLabel.h，FRHyperLabel.m复制到您的项目中。

  2. 在UILabel中拖放Storyboard，并在标识检查器中将自定义类名定义为FRHyperLabel，如图所示。

    3. enter image description here

    1. 将故事板中的UILabel连接到viewController.h文件

      2. @property (weak, nonatomic) IBOutlet FRHyperLabel *label;

      1. 现在在viewController.m文件中添加以下代码。

        2. `NSString * string = @“通过上传我同意使用条款”;     NSDictionary * attributes = @ {NSFontAttributeName：[UIFont preferredFontForTextStyle：UIFontTextStyleHeadline]}; 

        _label.attributedText = [[NSAttributedString alloc]initWithString:string attributes:attributes];
[_label setFont:[_label.font fontWithSize:13.0]];

[_label setLinkForSubstring:@"Terms of Use" withLinkHandler:^(FRHyperLabel *label, NSString *substring){
    [[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"http://www.google.com"]];
}];`
        1. 然后运行它。

答案 7 :(得分：0)

extension UITapGestureRecognizer {

    func didTapAttributedTextInLabel(label: UILabel, inRange targetRange: NSRange) -> Bool {

        let layoutManager = NSLayoutManager()
        let textContainer = NSTextContainer(size: CGSize.zero)
        let textStorage = NSTextStorage(attributedString: label.attributedText!)

        // Configure layoutManager and textStorage
        layoutManager.addTextContainer(textContainer)
        textStorage.addLayoutManager(layoutManager)

        // Configure textContainer
        textContainer.lineFragmentPadding = 0.0
        textContainer.lineBreakMode = label.lineBreakMode
        textContainer.maximumNumberOfLines = label.numberOfLines
        textContainer.size = label.bounds.size

        // main code
        let locationOfTouchInLabel = self.location(in: label)

        let indexOfCharacter = layoutManager.characterIndex(for: locationOfTouchInLabel, in: textContainer, fractionOfDistanceBetweenInsertionPoints: nil)
        let indexOfCharacterRange = NSRange(location: indexOfCharacter, length: 1)
        let indexOfCharacterRect = layoutManager.boundingRect(forGlyphRange: indexOfCharacterRange, in: textContainer)
        let deltaOffsetCharacter = indexOfCharacterRect.origin.x + indexOfCharacterRect.size.width

        if locationOfTouchInLabel.x > deltaOffsetCharacter {
            return false
        } else {
            return NSLocationInRange(indexOfCharacter, targetRange)
        }
    }
}

答案 8 :(得分：0)

为什么不只使用 NSMutableAttributedString ？ 

let attributedString = NSMutableAttributedString(string: "Want to learn iOS? Just visit developer.apple.com!")
        attributedString.addAttribute(.link, value: "https://developer.apple.com", range: NSRange(location: 30, length: 50))

        myView.attributedText = attributedString

您可以找到更多详细信息here

答案 9 :(得分：-1)

使用UIButton的Swift 4.0可能的解决方案

     phoneButton = UIButton(frame: CGRect(x: view.frame.width * 0, y: view.frame.height * 0.1, width: view.frame.width * 1, height: view.frame.height * 0.05))
     phoneButton.setTitle("333-333-3333", for: .normal )
     phoneButton.setTitleColor(UIColor(red: 0 / 255, green: 0 / 255, blue: 238 / 255, alpha: 1.0), for: .normal)
     phoneButton.addTarget(self, action: #selector(self.callPhone), for: .touchUpInside )

     @objc func callPhone(){

         UIApplication.shared.open(URL(string:"tel://3333333333")!, options: [:] , completionHandler: nil)


    }

答案 10 :(得分：-1)

Swift 4.2，Xcode 9.3版本 

class LinkedLabel: UILabel {

    fileprivate let layoutManager = NSLayoutManager()
    fileprivate let textContainer = NSTextContainer(size: CGSize.zero)
    fileprivate var textStorage: NSTextStorage?


    override init(frame aRect:CGRect){
        super.init(frame: aRect)
        self.initialize()
    }

    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        self.initialize()
    }

    func initialize(){

        let tap = UITapGestureRecognizer(target: self, action: #selector(self.handleTapOnLabel))
        self.isUserInteractionEnabled = true
        self.addGestureRecognizer(tap)
    }

    override var attributedText: NSAttributedString?{
        didSet{
            if let _attributedText = attributedText{
                self.textStorage = NSTextStorage(attributedString: _attributedText)

                self.layoutManager.addTextContainer(self.textContainer)
                self.textStorage?.addLayoutManager(self.layoutManager)

                self.textContainer.lineFragmentPadding = 0.0;
                self.textContainer.lineBreakMode = self.lineBreakMode;
                self.textContainer.maximumNumberOfLines = self.numberOfLines;
            }

        }
    }

    @objc func handleTapOnLabel(tapGesture:UITapGestureRecognizer){

        let locationOfTouchInLabel = tapGesture.location(in: tapGesture.view)
        let labelSize = tapGesture.view?.bounds.size
        let textBoundingBox = self.layoutManager.usedRect(for: self.textContainer)
        let textContainerOffset = CGPoint(x: ((labelSize?.width)! - textBoundingBox.size.width) * 0.5 - textBoundingBox.origin.x, y: ((labelSize?.height)! - textBoundingBox.size.height) * 0.5 - textBoundingBox.origin.y)

        let locationOfTouchInTextContainer = CGPoint(x: locationOfTouchInLabel.x - textContainerOffset.x, y: locationOfTouchInLabel.y - textContainerOffset.y)
        let indexOfCharacter = self.layoutManager.characterIndex(for: locationOfTouchInTextContainer, in: self.textContainer, fractionOfDistanceBetweenInsertionPoints: nil)


        self.attributedText?.enumerateAttribute(NSAttributedStringKey.link, in: NSMakeRange(0, (self.attributedText?.length)!), options: NSAttributedString.EnumerationOptions(rawValue: UInt(0)), using:{
            (attrs: Any?, range: NSRange, stop: UnsafeMutablePointer<ObjCBool>) in

            if NSLocationInRange(indexOfCharacter, range){
                if let _attrs = attrs{

                    UIApplication.shared.openURL(URL(string: _attrs as! String)!)
                }
            }
        })

    }}
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