Question

在用于缓存控制的JSP文件中，我使用了pragma指令作为

///in view did load
view_NoConnectn = [[UIView alloc]init];
[view_NoConnectn setBackgroundColor:[UIColor whiteColor]];
[view_NoConnectn setFrame:CGRectMake(0, frameHeight, frameWidth, 35)];

UIWindow* mainWindow = [[UIApplication sharedApplication] keyWindow];
 bool isFound=false;
for(UIView *child in [mainWindow subviews])
{
    if([child tag]==007)
        isFound=true;
}
 if(!isFound)
{
    [mainWindow addSubview: btn_setting];
}

[self.navigationController.view addSubview:view_NoConnectn];



////// whereever required
   if (show){
    if (self.navigationController.view.frame.size.height == frameHeight) {
        [UIView animateWithDuration:1.0 animations:^{
            [self.navigationController.view setFrame:CGRectMake(self.navigationController.view.frame.origin.x, self.navigationController.view.frame.origin.y, self.navigationController.view.frame.size.width, frameHeight - 35)];
            [view_NoConnectn setFrame:CGRectMake(0, frameHeight-35, frameWidth, 35)];
            [self.view layoutIfNeeded];
        }];

    }

}
else
{
    if (self.navigationController.view.frame.size.height != frameHeight) {
        [UIView animateWithDuration:1.0 animations:^{
            [UIView animateWithDuration:0.8 animations:^{
                [self.navigationController.view setFrame:CGRectMake(self.navigationController.view.frame.origin.x, self.navigationController.view.frame.origin.y, self.navigationController.view.frame.size.width, frameHeight)];
                [view_NoConnectn setFrame:CGRectMake(0, frameHeight, frameWidth, 35)];
                [self.view layoutIfNeeded];
            }];
        } completion:^(BOOL finished) {
            [view_NoConnectn removeFromSuperview];
        }];
    }

}

但是在从w3c验证器验证我的页面时，我遇到了以下错误

元素元素属性http-equiv的错误值pragma。

元素元素属性http-equiv的错误值缓存控制。

所以我正在寻找替代方法来在这种情况下传递w3c验证。

PS：我是JSP和HTML的初学者。在此先感谢

Answer 1

使用HTTP headers instead。

You can set them using setHeader.例如

 httpResponse.setHeader("Pragma", "no-cache"); // HTTP 1.0

在元标记中替换http-equiv =“pragma”和http-equiv =“cache-control”

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