实现Label文本内容中电话号码特殊颜色显示并点击电话号码能拨打

#pramark-<识手机号>
- (void)validPhoneNum{
//获取字符串中的电话号码
NSString *regulaStr = @"\\d{3,4}[- ]?\\d{7,8}";
NSRange stringRange = NSMakeRange(0, _contentStr.length);
//正则匹配
NSError *error;
NSRegularExpression *regexps = [NSRegularExpression regularExpressionWithPattern:regulaStr options:0 error:&error];
if (!error && regexps != nil) {
[regexps enumerateMatchesInString:_contentStr options:0 range:stringRange usingBlock:^(NSTextCheckingResult * _Nullable result, NSMatchingFlags flags, BOOL * _Nonnull stop) {

//可能为电话号码的字符串及其所在位置
//           NSString *actionString = [NSString stringWithFormat:@"%@",[_contentStr substringWithRange:result.range]];
NSRange phoneRange = result.range;

//            NSLog(@"%@-----%@", actionString, NSStringFromRange(phoneRange));

//设置文本中的电话号码显示为蓝色
NSMutableAttributedString *str = [[NSMutableAttributedString alloc]initWithString:_contentStr];
[str addAttribute:NSForegroundColorAttributeName value:[UIColor blueColor] range:phoneRange];
_contenLabel.attributedText = str;

//点击拨打电话
UIControl *phoneControl = [_contenLabel viewWithTag:1234];
if (phoneControl == nil) {
UIControl *phoneControl = [[UIControl alloc] initWithFrame:[self boundingRectForCharacterRange:phoneRange]];
phoneControl.tag = 1234;
[phoneControl addTarget:self action:@selector(phoneLink) forControlEvents:UIControlEventTouchUpInside];
[_contenLabel addSubview:phoneControl];
}
}];
}
}

#pragma mark-<获取电话号码的坐标>
- (CGRect)boundingRectForCharacterRange:(NSRange)range andContentStr:(NSString *)contentStr
{
NSMutableAttributedString *attributeString = [[NSMutableAttributedString alloc] initWithString:contentStr];
NSDictionary *attrs =@{NSFontAttributeName : [UIFont systemFontOfSize:14.0]};
[attributeString setAttributes:attrs range:NSMakeRange(0, contentStr.length)];

NSTextStorage *textStorage = [[NSTextStorage alloc] initWithAttributedString:attributeString];
NSLayoutManager *layoutManager = [[NSLayoutManager alloc] init];
[textStorage addLayoutManager:layoutManager];
NSTextContainer *textContainer = [[NSTextContainer alloc] initWithSize:[self bounds].size];
textContainer.lineFragmentPadding = 0;
[layoutManager addTextContainer:textContainer];

NSRange glyphRange;

[layoutManager characterRangeForGlyphRange:range actualGlyphRange:&glyphRange];

CGRect rect = [layoutManager boundingRectForGlyphRange:glyphRange inTextContainer:textContainer];
CGFloat yOfset =  rect.origin.y;
rect.origin.y = yOfset + 4;

return rect;
}
#pragma mark-点击拨打电话
- (void)phoneLink{
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"您确定要拨打电话吗？" message:nil delegate:self cancelButtonTitle:@"取消" otherButtonTitles:@"确定", nil];
[alertView show];

}

#pragma mark-<UIAlertViewDelegate>
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{
if (buttonIndex == 0) {
//取消

}else{
//确定
NSMutableString *phone = [[NSMutableString alloc] initWithFormat:@"tel:%@",_phoneStr];
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:phone]];

}
}