目标C接收数据并将其保存为xml文件,以便在没有Internet连接的情况下进行读取

Question

我有这种方法从谷歌阅读器获取xml文件与feed阅读器的竞争.我想在本地保存数据(我确定数据是一个xml文件)我该怎么办？我可以存储本地数据以便以后读取它而无需连接互联网？我能怎么做？谢谢

- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)aResponse
{
    NSLog(@"------------------------------- connectionDidReceiveResponse");
    expectedResponseLength = [NSNumber numberWithFloat:[aResponse expectedContentLength]];
    URLresponse = aResponse;
}

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{   
    NSLog(@"------------------------------- connectionDidReceiveData: %@", data);
    //float l = [responseData length];
    //[delegate GoogleReaderRequestReceiveBytes:l onTotal:[expectedResponseLength floatValue]];


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


    [self.responseData appendData:data];
}

编辑**

我使用这个代码但是不起作用

- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)aResponse
{
    NSLog(@"------------------------------- connectionDidReceiveResponse");
    expectedResponseLength = [NSNumber numberWithFloat:[aResponse expectedContentLength]];
    URLresponse = aResponse;
}

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{   
    NSLog(@"------------------------------- connectionDidReceiveData: %@", data);
    //float l = [responseData length];
    //[delegate GoogleReaderRequestReceiveBytes:l onTotal:[expectedResponseLength floatValue]];


    //TESTING
    NSString *string = [[NSString alloc] initWithData:data encoding:NSASCIIStringEncoding];
    NSLog(@"the  data %@",string);
    NSString *path=@"Library/News";
    [data writeToFile:path atomically:YES];

    [self.responseData appendData:data];
}

- (void)connection:(NSURLConnection *)connection didSendBodyData:(NSInteger)bytesWritten totalBytesWritten:(NSInteger)totalBytesWritten totalBytesExpectedToWrite:(NSInteger)totalBytesExpectedToWrite;
{
    NSLog(@"------------------------------- connectionDidSendBodyData: %d", totalBytesWritten);
}

- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)theError
{
    NSLog(@"------------------------------- connectionDidFailWithError: %@", [theError localizedDescription]);

    self.responseData = nil;
    NSString *path=@"Library/News";
    NSData *data = [[NSData alloc] initWithContentsOfFile:path];
    [self.responseData appendData:data];

    [delegate GoogleReaderRequestDidFailWithError:theError];
}

Answer 1

您可以使用writeToFile:atomically:方法来存储NSData对象.
样品:

[data writeToFile:path atomically:YES];