在webview中多次加載網頁的速度較慢

我正在開發一個示例iPad應用程序，其中我在UIWebview中顯示了一些網頁，代碼工作正常。但我認爲這些網頁需要花費太多時間才能加載到UIWebview.My代碼如下：在webview中多次加載網頁的速度較慢

-(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]; 


}

那麼如何讓它更快，請指導我。

來源

2012-03-17 user1227928

需要多少時間？你是否將實現的性能與在Safari中加載4個不同頁面所需的時間進行比較（我們應該假設這將是最佳性能）。根據我的經驗，將內容加載到WebView中比我想要的要慢，即使內容是本地HTML。你在做什麼看起來非常複雜或錯誤。所以你應該在Safari中進行一些性能測試，以確保你已經正確地設定了對可能性的期望。 – janoside 2012-03-17 14:19:02

那麼，我必須使用NSOperationQueue或任何線程？ – user1227928 2012-03-17 14:46:16

爲此，您必須使用NSOpertaionQueue或GCD隊列是另一個選項

來源

2012-03-19 13:47:28 Mangesh

在webview中多次加載網頁的速度較慢

回答

相關問題