在我的应用程序中,我正在将一个巨大的(200MB+)文件下载到磁盘。
下载完成后,我收到此错误:
[NSURLConnectionInternalConnection _withConnectionDisconnectFromConnection]:
message sent to deallocated instance 0x8cb0b40
我尝试调用info malloc-history 0x8cb0b40但我得到了
Undefined info command: "malloc-history 0x8cb0b40". Try "help info".
我正在使用(gdb),但仍在获取此信息。我在这里找不到错误。
我该如何解决这个问题?
所以这是我的代码(NSURL 方法):
#pragma mark - NSURL methods
- (void)loadingProgress:(NSNumber *)nProgress {
[self.progressView setProgress:[nProgress floatValue]];
}
- (void) connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {
XLog(@"");
[self.receivedData setLength:0];
XLog(@"response: %@", [response description]);
self.path = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0] stringByAppendingPathComponent:@"vox.zip"];
[[NSFileManager defaultManager] createFileAtPath:self.path contents:nil attributes:nil];
self.file = [[NSFileHandle fileHandleForUpdatingAtPath:self.path] retain];// Here file is object of NSFileHandle and its declare in .h File
[self.file seekToEndOfFile];
if ([response isKindOfClass:[NSHTTPURLResponse self]]) {
NSDictionary *headers = [(NSHTTPURLResponse *)response allHeaderFields];
lengthOfXMLContent = [[headers objectForKey:@"Content-Length"] intValue];
XLog(@"session: %@", [headers objectForKey:@"Set-Cookie"]);
[self.prefs setValue:[headers objectForKey:@"Set-Cookie"] forKey:@"keySession"];
XLog(@"headers: %@", headers);
XLog(@"Incoming length: %i", lengthOfXMLContent);
}
}
- (void) connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
//XLog(@"didReceiveData entered");
self.dataCount = self.dataCount + [data length];
if (self.receivedData) {
self.paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
self.documentsDirectory = [self.paths objectAtIndex:0];
self.responseString = [[[NSString alloc] initWithData:self.receivedData encoding:NSUTF8StringEncoding] autorelease];
}
XLog(@"------------------------------------------: %d", lengthOfXMLContent);
double progress = (double)self.dataCount / (double)lengthOfXMLContent;
XLog(@"--------------: %i", self.dataCount);
XLog(@"--------------: %d", lengthOfXMLContent);
XLog(@"--------------: ");
XLog(@"--------------: %f \n", progress);
[self.file seekToEndOfFile];
[self.file writeData:data];
//XLog(@"data--------------: %i", [data length]);
[self performSelectorInBackground:@selector(loadingProgress:) withObject:[NSNumber numberWithFloat:progress]];
}
- (void) connection:(NSURLConnection *)connection didFailWithError:(NSError *)error {
XLog(@"");
XLog(@"error: %@", error);
self.receivedData = nil;
self.progressView.progress = 0.00;
lengthOfXMLContent = 0;
//recievedData = NO;
UIAlertView *alertCanceled = [[UIAlertView alloc] initWithTitle:@"Verbindungsfehler" message:@"Verbindung wurde unterbrochen. \nPruefen Sie Ihre Verbindung und versuchen Sie es noch einmal." delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];
[alertCanceled show];
[alertCanceled release];
viewDownload.hidden = YES;
//[self removeActivityViewer];
[connection release];
[self.file closeFile];
}
- (void) connectionDidFinishLoading:(NSURLConnection *)connection {
XLog(@"");
[self.file closeFile];
//NSError *error = nil;
XLog(@"Succeeded! Received %d bytes of data", [self.receivedData length]);
[connection release];
//self.lblInfo.text = @"Datei wurde heruntergeladen.\nDatei wird entpackt, bitte Warten..";
self.progressView.hidden = YES;
self.btnDownloadVOX_DE.hidden = YES;
self.btnDownloadVOX_EN.hidden = YES;
[UIApplication sharedApplication].networkActivityIndicatorVisible = NO;
ZipArchive *za = [[[ZipArchive alloc] init] autorelease];
[za UnzipOpenFile:[NSString stringWithFormat:@"%@/vox.zip", self.documentsDirectory]];
[za UnzipFileTo:self.documentsDirectory overWrite:YES];
viewDownload.hidden = YES;
}