下載文件時UIWebView鎖定/凍結/掛起應用程序？

Question

我的應用程序使用UIWebView加載網站和下載文件，當用戶點擊下載鏈接時，應用程序凍結，直到文件完成下載，然後應用程序恢復正常，它不會崩潰，它只是凍結。我解決這個問題？

即時通訊使用此代碼下載從蘋果iOS 5.1的文檔

- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType 
{ 

if(navigationType == UIWebViewNavigationTypeLinkClicked) 
{ 
    NSURL *requestedURL = [request URL]; 

    // ...Check if the URL points to a file you're looking for... 
    // Then load the file 
    NSData *fileData = [[[NSData alloc] initWithContentsOfURL:requestedURL] autorelease]; 

    // Get the path to the App's Documents directory 
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); 
    NSString *documentsDirectory = [paths objectAtIndex:0]; // Get documents folder 
    [fileData writeToFile:[NSString stringWithFormat:@"%@/%@", documentsDirectory, [requestedURL lastPathComponent]] atomically:YES]; 
} 
return YES; 
} 


- (NSString *)documentsDirectoryPath { 
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); 
NSString *documentsDirectoryPath = [paths objectAtIndex:0]; 
return documentsDirectoryPath; 
} 

Answer 1

參見「網址加載系統編程指南」。您需要設置異步請求。 URL加載系統有許多代碼示例。