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  • UILabel和UIButton添加下划线

    关于UILabel和UIButton有的时候需要添加下划线,一般有两种方式通过默认的 NSMutableAttributedString设置,第二种就是在drawRect中画一条下划线,本文就简单的选择第一种,第二种有兴趣的可以自己研究一下。

    UILabel设置下划线:

      

    UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(10, 100, 310, 50)];
        label.backgroundColor = [UIColor redColor];
        [label setLineBreakMode:NSLineBreakByWordWrapping];
        label.numberOfLines =3;
        [label setFont:[UIFont systemFontOfSize:14]];
        NSMutableAttributedString *content = [[NSMutableAttributedString alloc]initWithString:[NSString stringWithFormat:@"博文地址:http://www.cnblogs.com/xiaofeixiang 博客园-FlyElephant QQ群:228407086"]];
        NSRange contentRange = {0,[content length]};
        [content addAttribute:NSUnderlineStyleAttributeName value:[NSNumber numberWithInteger:NSUnderlineStyleSingle] range:contentRange];
    label.attributedText = content;
    [self.view addSubview:label];</pre><br>

    UIButton设置下划线:

    UIButton *button=[[UIButton alloc]initWithFrame:CGRectMake(10, 200, 80, 30)]; 
    NSMutableAttributedString *title = [[NSMutableAttributedString alloc] initWithString:@"FlyElephant"];
    NSRange titleRange = {0,[title length]};
    [title addAttribute:NSUnderlineStyleAttributeName value:[NSNumber numberWithInteger:NSUnderlineStyleSingle] range:titleRange];
    [button setAttributedTitle:title
    forState:UIControlStateNormal];
    [button setBackgroundColor:[UIColor redColor]];
    [button.titleLabel setFont:[UIFont systemFontOfSize:14]];
    [self.view addSubview:button];
    
    
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  • 原文地址:https://www.cnblogs.com/edensyd/p/8493923.html
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