如何在IOS中更新App文件（html）？

我的应用程序非常简单。我有一些带有 html 文件名的 plist。当用户选择一行时，webview 会加载该 html 文件及其内容。我很好奇如何进行应用程序更新？例如：我有一个新的更新的 html 文件，并进行了更正，我希望用户通过单击应用程序中的按钮来下载该文件。我希望旧文件（html）被新文件替换。有没有办法做到这一点？不太确定从哪里开始，希望有人能指出正确的方向。我假设，无法更新 plist，我必须从 plist 切换到数据库，但问题仍然存在，如何让应用程序下载新文件并替换旧文件？

谢谢

只是为了详细说明一下。

我想我正在尝试找出在我的应用程序中完成更新的正确方法。我的 html 文件位于应用程序内，我假设我可能让应用程序最初连接到互联网并下载最新的内容文件（html、plist），将它们放入文档文件夹中，然后更新我的主屏幕 plist 文件？这是正确的思路吗？

我不希望该应用程序仅在互联网上使用，需要这些 html 文件可以离线使用。

正如许多人所建议的那样，我认为我的计划是从网络下载内容，将其保存在库文件夹中，然后从那里加载内容。在应用程序中，我将有一个更新按钮，每当用户选择时都会连接到服务器并更新内容。在 apple.com 找到示例代码（https://developer.apple.com/library/ios/#documentation/Cocoa/Conceptual/URLLoadingSystem/Tasks/UsingNSURLConnection.html https://developer.apple.com/library/ios/#documentation/Cocoa/Conceptual/URLLoadingSystem/Tasks/UsingNSURLConnection.html )

稍微调整一下，它应该可以正常工作，如果尝试下载多个文件，这也可能会有所帮助。在 iPhone 应用程序中下载多个文件（目标 c） https://stackoverflow.com/questions/1016040/downloading-multiple-files-in-iphone-appobjective-c

- (IBAction)down
{
    // Create the request.
    NSURLRequest *theRequest=[NSURLRequest requestWithURL:[NSURL URLWithString:@"http://abc.com/missing.html"]
                                              cachePolicy:NSURLRequestUseProtocolCachePolicy
                                          timeoutInterval:60.0];
    // create the connection with the request
    // and start loading the data
    NSURLConnection *theConnection=[[NSURLConnection alloc] initWithRequest:theRequest delegate:self];
    NSString *msg;
    if (theConnection) {
        // Create the NSMutableData to hold the received data.
        // receivedData is an instance variable declared elsewhere.
        receivedData = [[NSMutableData data] retain];



    } else {
        // Inform the user that the connection failed.


    }

}


- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
    // This method is called when the server has determined that it
    // has enough information to create the NSURLResponse.

    // It can be called multiple times, for example in the case of a
    // redirect, so each time we reset the data.


    // receivedData is an instance variable declared elsewhere.
    [receivedData setLength:0];
}

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
    // Append the new data to receivedData.
    //You can also use the connection:didReceiveData: method to provide an indication of the connection’s progress to the user.
    // receivedData is an instance variable declared elsewhere.

    NSString *msg = [NSString stringWithFormat:@"data %@",data,nil ];
    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"-download-" 
                                                    message:msg
                                                   delegate:nil 
                                          cancelButtonTitle:@"OK" 
                                          otherButtonTitles: nil];
    [alert show];
    [alert release];
   //NSLog ([[NSString alloc] initWithFormat:@"The value: %d  object: %@\n", alphArray.count, [alphArray objectAtIndex:1.1],nil]);

    NSString *string = [[NSString alloc] initWithData:data encoding:NSASCIIStringEncoding];
    NSLog(@"the data %@",string);

    NSString *libraryPath = [NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES) objectAtIndex:0];
    NSString *filePath = [libraryPath stringByAppendingPathComponent:@"Missing.html"];

    NSLog(@"Full path: %@", filePath);

    //NSArray *path = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);


    //write data to files
    [data writeToFile:filePath atomically:YES];

    [receivedData appendData:data];
}

- (void)connection:(NSURLConnection *)connection
  didFailWithError:(NSError *)error
{
    // release the connection, and the data object
    [connection release];
    // receivedData is declared as a method instance elsewhere
    [receivedData release];

    // inform the user
    NSLog(@"Connection failed! Error - %@ %@",
          [error localizedDescription],
          [[error userInfo] objectForKey:NSURLErrorFailingURLStringErrorKey]);
}

- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
    // do something with the data
    // receivedData is declared as a method instance elsewhere
    NSLog(@"Succeeded! Received %d bytes of data",[receivedData length]);

    // release the connection, and the data object
    [connection release];
    [receivedData release];
}

-(NSCachedURLResponse *)connection:(NSURLConnection *)connection
                 willCacheResponse:(NSCachedURLResponse *)cachedResponse
{
    NSCachedURLResponse *newCachedResponse = cachedResponse;

    if ([[[[cachedResponse response] URL] scheme] isEqual:@"https"]) {
        newCachedResponse = nil;
    } else {
        NSDictionary *newUserInfo;
        newUserInfo = [NSDictionary dictionaryWithObject:[NSDate date]
                                                  forKey:@"Cached Date"];
        newCachedResponse = [[[NSCachedURLResponse alloc]
                              initWithResponse:[cachedResponse response]
                              data:[cachedResponse data]
                              userInfo:newUserInfo
                              storagePolicy:[cachedResponse storagePolicy]]
                             autorelease];
         NSLog(@"Succeeded! Receive use:%@",newUserInfo);
    }
    NSLog(@"Succeeded! Received %@ - use:%@",newCachedResponse);
    return newCachedResponse;
}