代码版本：
1 NSMutableAttributedString *str = [[NSMutableAttributedString alloc] initWithString:@"点击注册代表您已经同意我们的《用户协议》"]; 2 NSRange strRange = {14,6}; 3 [str addAttribute:NSForegroundColorAttributeName value:[UIColor colorInSkinWithKey:@"useColor1"] range:strRange]; //设置颜色 4 [str addAttribute:NSUnderlineStyleAttributeName value:[NSNumber numberWithInteger:NSUnderlineStyleSingle] range:strRange]; 5 6 //因为是 NSMutableAttributedString 所以要使用 7 8 [_radioButton setAttributedTitle:str forState:UIControlStateNormal];
经常看新手一个一个输入框的收键盘，其实一句话就好了：
@interface UIView (UITextField) - (BOOL)endEditing:(BOOL)force; // use to make the view or any subview that is the first responder resign (optionally force) @end
[view.subviews makeObjectsPerformSelector:@selector(removeFromSuperview)]; //删除所有子视图