Ios 将轻触手势添加到UILabel的一部分

我有一个NSAttribute字符串，如下所示：

NSMutableAttributedString *str = [[NSMutableAttributedString alloc] initWithString:@"testing it out @clickhere"];
NSInteger length = str.length;
[str addAttribute:NSForegroundColorAttributeName value:[UIColor bestTextColor] range:NSMakeRange(0,length)];

NSMutableAttributeString设置为UILabel，如下所示：

label.attributedText = str;

对于上面字符串中的“@clickhere”，如何对另一个viewcontroller进行点击手势（或可点击的东西）

---

谢谢

只需先在标签上添加一个手势即可

[label setUserInteractionEnabled:YES];
UITapGestureRecognizer *gesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleGesture:)];
[label addGestureRecognizer:gesture];

let tap = UITapGestureRecognizer(target: self, action:    #selector(tapAction))
yourLabel.addGestureRecognizer(tap)

用下面的方法控制你的手势区域

- (void)handleGesture:(UIGestureRecognizer *)gestureRecognizer
{
    static CGRect touchableRect = CGRectMake(100.0f, 0.0f, 100.0f, 50.0f); // Give your rect as you need.
    CGPoint touchPoint = [gestureRecognizer locationInView:self.view];
    if (CGRectContainsPoint(touchableRect, touchPoint))
    {
       //User has tap on where you want. Do your other stuff here
    }
}

---

我认为，最好的方法是将

uigesturecognizer

添加到您的

UILabel

中，并验证您想要的帧

UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleTap:)];
[_yourLabel addGestureRecognizer:singleTap];

- (void)handleTap:(UITapGestureRecognizer *)tapRecognizer
{
    CGPoint touchPoint = [tapRecognizer locationInView: _yourLabel];

    //Modify the validFrame that you would like to enable the touch
    //or get the frame from _yourLabel using the NSMutableAttributedString, if possible
    CGRect validFrame = CGRectMake(0, 0, 300, 44);

    if(YES == CGRectContainsPoint(validFrame, touchPoint)
     {
        //Handle here.
     }
}

---

我只想补充Ramshad的答案，关于如何处理有效帧

为此，您可能需要考虑使用UITExtVIEW，而不是UIABEL，这不能让您访问它如何管理文本布局。通过禁用编辑、选择和滚动，UITextView的行为与UILabel大致相同，只是需要删除一些填充

为了方便起见，您可能希望向UITextView添加一个小类别，在该类别中，您可以编写一个方法来测试一个点是否触及范围内的任何字符

- (BOOL)point:(CGPoint)point touchesSomeCharacterInRange:(NSRange)range
{
    NSRange glyphRange = [self.layoutManager glyphRangeForCharacterRange:range actualCharacterRange:NULL];

    BOOL touches = NO;
    for (NSUInteger index = glyphRange.location; index < glyphRange.location + glyphRange.length; index++) {
        CGRect rectForGlyphInContainer = [self.layoutManager boundingRectForGlyphRange:NSMakeRange(index, 1) inTextContainer:self.textContainer];
        CGRect rectForGlyphInTextView = CGRectOffset(rectForGlyphInContainer, self.textContainerInset.left, self.textContainerInset.top);

        if (CGRectContainsPoint(rectForGlyphInTextView, point)) {
            touches = YES;
            break;
        }
    }

    return touches;
}

-（BOOL）点：（CGPoint）点接触someCharacterInRange：（NSRange）范围
{
NSRange glyphRange=[self.layoutManager glyphRangeForCharacterRange:range-actualCharacterRange:NULL]；
布尔接触=否；
对于（整数索引=glyphRange.location；索引

---

这也适用于包含多个单词的文本片段，这些单词由于换行而分散在多行中。当我们处理打印的字形时，它也可以处理本地化文本。

这个想法与公认的答案相同。这是斯威夫特的路

• 假设您已准备好设置标签

  youLabel.text=“请为我制表！”

• 将TapGestuerRecognitor添加到标签

  [label setUserInteractionEnabled:YES];
  UITapGestureRecognizer *gesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleGesture:)];
  [label addGestureRecognizer:gesture];
  

  let tap = UITapGestureRecognizer(target: self, action:    #selector(tapAction))
  yourLabel.addGestureRecognizer(tap)
  

• 将

  String

  扩展方法添加到String以计算String rect

  extension String {
      func rect(font: UIFont) -> CGRect {
          let label = UILabel(frame: .zero)
          label.font = font
          label.text = self
          label.sizeToFit()
          return label.frame
      }
  }
  

• 计算点击手势的可用点击矩形

  let pleaseStringRect = "please".rect(font: yourFont)
  let tapStringRect = "tap".rect(font: yourFont)
  let tapAreaRect = CGRect(x: pleaseStringRect.width, y:   tapStringRect.origin.y, width: tapStringRect.width, height: tapStringRect.height"
  

• 在行动中做你想做的

   @objc private func tapAction(tap: UITapGestureRecognizer) {
     let position = tap.location(in: content)
     guard reporterFirstNameRect.contains(position) else {
         return
     }
     // Do the tap action stuff
  }
  

  就这样，快乐编码

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