1     UIButton *tempBtn = [UIButton buttonWithType: UIButtonTypeCustom]; 2     tempBtn.frame = CGRectMake(50, 250, 80, 40); 3      4     NSMutableAttributedString *str = [[NSMutableAttributedString alloc] initWithString:@"忘记密码"]; 5     NSRange strRange = {0,[str length]}; 6     [str addAttribute:NSUnderlineStyleAttributeName value:[NSNumber numberWithInteger:NSUnderlineStyleSingle] range:strRange]; 7     [tempBtn setAttributedTitle:str forState:UIControlStateNormal]; 8      9     tempBtn.titleLabel.textColor = [UIColor blueColor];10     [self.view addSubview: tempBtn];