在webview中多次加载网页的速度较慢

我正在开发一个示例iPad应用程序，其中我在UIWebview中显示了一些网页，代码工作正常。但我认为这些网页需要花费太多时间才能加载到UIWebview.My代码如下：在webview中多次加载网页的速度较慢

-(void)createWebView 
{ 

    //******************** First Webview********* 

    firstWebView=[[UIWebView alloc]init]; 
    firstWebView.frame=CGRectMake(10, 50, 350, 470); 
    firstWebView.delegate=self; 
    firstIndicator = [[UIActivityIndicatorView alloc] 
             initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge]; 
    firstIndicator.center = CGPointMake(160, 240); 
    firstIndicator.hidesWhenStopped = YES; 
    [self.firstWebView addSubview:firstIndicator]; 
    [firstIndicator startAnimating]; 
    firstWebView.backgroundColor=[UIColor grayColor]; 
    NSURL *firstUrl = [NSURL URLWithString:@"http://www.techtree.com"]; 
    NSURLRequest *firstRequestObj = [NSURLRequest requestWithURL:firstUrl]; 
    [firstWebView loadRequest:firstRequestObj]; 
    [self.view addSubview:firstWebView]; 

    //******************* Second Webview********* 

    secondWebView=[[UIWebView alloc]init]; 
    secondWebView.frame=CGRectMake(405, 50, 350, 470); 
    secondWebView.delegate=self; 

    secondIndicator = [[UIActivityIndicatorView alloc] 
         initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge]; 
    secondIndicator.center = CGPointMake(160, 240); 
    secondIndicator.hidesWhenStopped = YES; 
    [self.secondWebView addSubview:secondIndicator]; 
    [secondIndicator startAnimating]; 
    secondWebView.backgroundColor=[UIColor grayColor]; 

    NSURL *secondUrl = [NSURL URLWithString:@"http://www.facebook.com"]; 
    NSURLRequest *secondRequestObj = [NSURLRequest requestWithURL:secondUrl]; 
    [secondWebView loadRequest:secondRequestObj]; 
    [self.view addSubview:secondWebView]; 


    //****************** Third Webview************ 

    thirdWebView=[[UIWebView alloc] init]; 
    thirdWebView.frame=CGRectMake(10, 528, 350, 470); 
    thirdWebView.delegate=self; 


    thirdIndicator = [[UIActivityIndicatorView alloc] 
         initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge]; 
    thirdIndicator.center = CGPointMake(160, 240); 
    thirdIndicator.hidesWhenStopped = YES; 
    [self.thirdWebView addSubview:thirdIndicator]; 
    [thirdIndicator startAnimating]; 

    thirdWebView.backgroundColor=[UIColor grayColor]; 

    NSURL *thirdUrl = [NSURL URLWithString:@"http://www.yahoo.com"]; 
    NSURLRequest *thirdRequestObj = [NSURLRequest requestWithURL:thirdUrl]; 
    [thirdWebView loadRequest:thirdRequestObj]; 
    [self.view addSubview:thirdWebView]; 

    //***************** Fourth Webview************ 
    fourthWebView=[[UIWebView alloc] init]; 
    fourthWebView.frame=CGRectMake(405,528, 350, 470); 
    fourthWebView.delegate=self; 


    fourthIndicator = [[UIActivityIndicatorView alloc] 
         initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge]; 
    fourthIndicator.center = CGPointMake(160, 240); 
    fourthIndicator.hidesWhenStopped = YES; 
    [self.fourthWebView addSubview:fourthIndicator]; 
    [fourthIndicator startAnimating]; 

    fourthWebView.backgroundColor=[UIColor grayColor]; 

    NSURL *fourthUrl = [NSURL URLWithString:@"http://stackoverflow.com"]; 
    NSURLRequest *fourthRequestObj = [NSURLRequest requestWithURL:fourthUrl]; 
    [fourthWebView loadRequest:fourthRequestObj]; 
    [self.view addSubview:fourthWebView]; 


    //******************** Memory Managemt ********** 
    [firstWebView release]; 
    [secondWebView release]; 
    [thirdWebView release]; 
    [fourthWebView release]; 


}

那么如何让它更快，请指导我。

来源

2012-03-17 user1227928

需要多少时间？你是否将实现的性能与在Safari中加载4个不同页面所需的时间进行比较（我们应该假设这将是最佳性能）。根据我的经验，将内容加载到WebView中比我想要的要慢，即使内容是本地HTML。你在做什么看起来非常复杂或错误。所以你应该在Safari中进行一些性能测试，以确保你已经正确地设定了对可能性的期望。 – janoside 2012-03-17 14:19:02

那么，我必须使用NSOperationQueue或任何线程？ – user1227928 2012-03-17 14:46:16

为此，您必须使用NSOpertaionQueue或GCD队列是另一个选项

来源

2012-03-19 13:47:28 Mangesh

在webview中多次加载网页的速度较慢

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