iOS中使用UITextView设置不同文本部分点击事件小结

最近在项目开发中遇到了

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设置多行文本，点击蓝色邮箱部分跳转到发邮件页面功能。当然比较简单的方式是多标签单独设置，那样稍显麻烦。我们能不能用一个控件，给某一部分添加点击事件，结果是可以的，UITextView完美实现这个功能，代码如下。

1、添加UITextView的代理UITextViewDelegate

2、@property (nonatomic, strong) UITextView *textRemind;//设置UITextView属性变量

• (UITextView *)textRemind{

  if (_textRemind == nil) {

    _textRemind = [[UITextView alloc]init];
  
    _textRemind.backgroundColor = [UIColor greenColor];
  
    _textRemind.textColor=K_CC_COLOR_STRING(@"#999999");
  
    //_textRemind.textAlignment = NSTextAlignmentRight;//此处没有效果，需要在属性里面单独设置
  
    _textRemind.font = K_CC_FONT_SEMIBOLD(14);
  

  }

  return _textRemind;

}

//顶部菜单标题

NSString *firstStr=@"此功能暂时无法使用,请联系\n";

NSString *secondStr=@"[email protected]\n";

NSString *thirdStr=@"或\n";

NSString *fourthStr=@"[email protected]\n";

NSString *fifthStr=@"开通";

NSString *remindStr=[NSString stringWithFormat:@"%@%@%@%@%@",firstStr,secondStr,thirdStr,fourthStr,fifthStr];

NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:remindStr];

//给需要点击的部分添加关键字

[attributedString addAttribute:NSLinkAttributeName

                        value:@"firstmanager"

                        range:[[attributedString string] rangeOfString:secondStr]];

[attributedString addAttribute:NSLinkAttributeName

                        value:@"secondmanager"

                        range:[[attributedString string] rangeOfString:fourthStr]];

//设置水平中间对齐

NSMutableParagraphStyle *paragrahStyle = [[NSMutableParagraphStyle alloc] init];

[paragrahStyle setAlignment:NSTextAlignmentCenter];

[attributedString addAttribute:NSParagraphStyleAttributeName value:paragrahStyle range:NSMakeRange(0, remindStr.length)];

self.textRemind.attributedText = attributedString;

//设置点击部分的文字颜色

self.textRemind.linkTextAttributes = @{NSForegroundColorAttributeName: K_CC_COLOR_STRING(@"#2D6CFC") };

self.textRemind.editable = NO; //必须禁止输入，否则点击将弹出输入键盘

self.textRemind.scrollEnabled = NO;

self.textRemind.selectable = NO;

self.textRemind.delegate = self;

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

[self.textRemind addGestureRecognizer:tapRecognizer];

[self.view addSubview:self.textRemind];

[self.textRemind mas_makeConstraints:^(MASConstraintMaker *make) {

    make.center.equalTo(self.view);

    make.height.mas_equalTo(100);

    make.width.mas_equalTo(K_CC_SCREEN_WIDTH-32);

}];

3、添加手势处理

-(void)addGestureRecognizer:(UIGestureRecognizer*)gestureRecognizer{

if ([gestureRecognizer isKindOfClass:[UITapGestureRecognizer class]])

{

    CGPoint tapLocation = [gestureRecognizer locationInView:self.textRemind];

    UITextPosition *textPosition = [self.textRemind closestPositionToPoint:tapLocation];

    NSDictionary *attributes = [self.textRemind textStylingAtPosition:textPosition inDirection:UITextStorageDirectionBackward];

    NSURL *url = attributes[NSLinkAttributeName];

    if(url) {

        NSRange range = [self.textRemind.text rangeOfString:@"[email protected]\n"];

        if (([url isKindOfClass:[NSString class]] && [(NSString *)url isEqualToString:@"firstmanager"])) {

            range = [self.textRemind.text rangeOfString:@"[email protected]\n"];

        } else if(([url isKindOfClass:[NSString class]] && [(NSString *)url isEqualToString:@"secondmanager"])){

            range = [self.textRemind.text rangeOfString:@"[email protected]\n"];

        }

        [self  textView:self.textRemind shouldInteractWithURL:url inRange:range];

      }

    }

}

• (BOOL)textView:(UITextView *)textView shouldInteractWithURL:(NSURL *)URL inRange:(NSRange)characterRange{

  if ([(NSString *)URL isEqualToString:@"firstmanager"]) {

    return NO;
  

  } else if ([(NSString *)URL isEqualToString:@"secondmanager"]) {

    return NO;
  

  }

  return YES;

}