iOS 自定义属性 attribute

 //注册协议

    NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:@"我已阅读并同意《YESOUL条款》"];

    [attributedString addAttribute:NSFontAttributeName value:[UIFont systemFontOfSize:14.0] range:NSMakeRange(0, 7)];

    [attributedString addAttribute:NSForegroundColorAttributeName value:[UIColor colorWithHexString:@"d20037"] range:NSMakeRange(7, 10)];

    

    UIButton *agree = [[UIButton alloc] initWithFrame:CGRectMake(10, 10 100, 30)];

    [agree setAttributedTitle:attributedString forState:UIControlStateNormal];

    agree.titleLabel.textColor = [UIColor colorWithHexString:@"ffffff"];

    agree.backgroundColor=[UIColor clearColor];

//按钮文字左对齐，设置距左边多少像素

    agree.contentHorizontalAlignment = UIControlContentHorizontalAlignmentLeft;

    agree.titleEdgeInsets = UIEdgeInsetsMake(0, 1, 0, 0);

    agree.titleLabel.textAlignment = NSTextAlignmentLeft;

    agree.titleLabel.font = [UIFont systemFontOfSize:15];

    [self.view addSubview:agree];

 //如图所示：