iOS给字符串添加下划线,并设置点击效果

一、给字符串设置下划线效果:
例如给字符串 ABCDEFG 设置下划线效果

NSMutableAttributedString *str = [[NSMutableAttributedString alloc] initWithString:@"ABCDEFG"  attributes:@{NSUnderlineStyleAttributeName : @(NSUnderlineStyleSingle)}];
label.attributedText = str;

二、给字符串设置点击效果
例如要达到以下效果

屏幕快照 2019-05-12 上午10.01.54.png

这里我们要使用的是TTTAttributedLabel 一个功能丰富的富文本开源库.
1.设置代理

@interface SHSignRegViewController ()

2.设置lable

    NSString *termOfUse = Localized(@"《用户使用协议》");
    NSString *str = [NSString stringWithFormat:@"已阅读并同意%@",termOfUse];
    NSRange termRange = [str rangeOfString:termOfUse];
    TTTAttributedLabel *protpcplLabel = [[TTTAttributedLabel alloc] initWithFrame:CGRectMake(WIDTH + WIDTHMAKE(35), grayLine.bottom + 10, WIDTH - WIDTHMAKE(60), 40)];
    protpcplLabel.delegate = self;
    protpcplLabel.numberOfLines = 2;
    NSMutableAttributedString *atributeStr = [[NSMutableAttributedString alloc] initWithString:str attributes:@{NSForegroundColorAttributeName:[UIColor grayColor],NSFontAttributeName :[UIFont systemFontOfSize:14]}];
    protpcplLabel.text = atributeStr;
    [protpcplLabel addLinkToURL:[NSURL URLWithString:@"teamRange"] withRange:termRange];
    [_scrollView addSubview:protpcplLabel];

3.实现代理方法

- (void)attributedLabel:(TTTAttributedLabel *)label didSelectLinkWithURL:(NSURL *)url {
    if ([url.absoluteString isEqualToString:@"teamRange"]) {
        //响应点击事件
    }
}