iOS 按钮上的文字添加下划线

问题：实现下图中右侧的按钮文字效果

images/loading.gif' data-original="http://images2015.cnblogs.com/blog/786772/201605/786772-20160504103616810-58944041.png" />

方法：

  [MyTools createMyImageview:topEditView frame:CGRectMake(widthAll-90, 12, 17, 16) imageName:@"离线课程_下载更多.png"];  UIButton *downMoreButton = [MyTools createMyBtn:@"下载更多" frame:CGRectMake(widthAll-70, 10, 60, 20) uiview:topEditView uifont:14 color:[UIColor colorWithRed:92/255.0 green:218/255.0 blue:231/255.0 alpha:1]];  NSMutableAttributedString *title = [[NSMutableAttributedString alloc] initWithString:@"下载更多"];  NSRange titleRange = {0,[title length]};  [title addAttribute:NSUnderlineStyleAttributeName value:[NSNumber numberWithInteger:NSUnderlineStyleSingle] range:titleRange];  [downMoreButton setAttributedTitle:title               forState:UIControlStateNormal];  [downMoreButton.titleLabel setFont:[UIFont systemFontOfSize:14]];  [downMoreButton addTarget:self action:@selector(downMore) forControlEvents:UIControlEventTouchUpInside];

原标题：iOS 按钮上的文字添加下划线

关键词：IOS