ASIHTTPRequest實現斷點下載

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- (IBAction)URLFetchWithProgress:(id)sender{[startButton setTitle:@"Stop" forState:UIControlStateNormal];[startButton addTarget:self action:@selector(stopURLFetchWithProgress:)forControlEvents:UIControlEventTouchUpInside];NSString*tempFile = [[[[NSBundle mainBundle] bundlePath]stringByDeletingLastPathComponent]stringByAppendingPathComponent:@"MemexTrails_1.0b1.zip.download"];if ([[NSFileManager defaultManager] fileExistsAtPath:tempFile]) {[[NSFileManager defaultManager] removeItemAtPath:tempFile error:nil];}[self resumeURLFetchWithProgress:self];}- (IBAction)stopURLFetchWithProgress:(id)sender{networkQueue = [[ASINetworkQueue alloc] init];timer = [NSTimer scheduledTimerWithTimeInterval:1.0 target:selfselector:@selector(updateBandwidthUsageIndicator) userInfo:nil repeats:YES];timer = nil;[startButton setTitle:@"Stop" forState:UIControlStateNormal];[startButton addTarget:self action:@selector(URLFetchWithProgress:)forControlEvents:UIControlEventTouchUpInside];[networkQueue cancelAllOperations];[resumeButton setEnabled:YES];}- (IBAction)resumeURLFetchWithProgress:(id)sender {[resumeButton setEnabled:NO];[startButton setTitle:@"Start" forState:UIControlStateNormal]; [startButton addTarget:self action:@selector(stopURLFetchWithProgress:)forControlEvents:UIControlEventTouchUpInside];[networkQueue cancelAllOperations];[networkQueue setShowAccurateProgress:YES];[networkQueue setDownloadProgressDelegate:progressIndicator];[networkQueue setDelegate:self];[networkQueue setRequestDidFinishSelector:@selector(URLFetchWithProgressComplete:)];ASIHTTPRequest*request=[[[ASIHTTPRequest alloc] initWithURL:[NSURLURLWithString:@"http://9991.net/blog/mp3/2.mp3"]] autorelease];[request setDownloadDestinationPath:[[[[NSBundle mainBundle] bundlePath]stringByDeletingLastPathComponent] stringByAppendingPathComponent:@"MemexTrails_1.0b1.mp3"]];[request setTemporaryFileDownloadPath:[[[[NSBundle mainBundle] bundlePath]stringByDeletingLastPathComponent]stringByAppendingPathComponent:@"MemexTrails_1.0b1.zip.down"]];[request setAllowResumeForFileDownloads:YES];[networkQueue addOperation:request];[networkQueue go];}- (void)URLFetchWithProgressComplete:(ASIHTTPRequest *)request{if ([request error]) {fileLocation.text=[NSString stringWithFormat:@"An error occurred:%@",[[[requesterror] userInfo] objectForKey:@"Title"]];} else {fileLocation.text=[NSString stringWithFormat:@"File downloaded to %@",[requestdownloadDestinationPath]];}[startButton setTitle:@"Start" forState:UIControlStateNormal];[startButton addTarget:self action:@selector(URLFetchWithProgress:)forControlEvents:UIControlEventTouchUpInside];}- (IBAction)throttleBandwidth:(id)sender{if ([(UIButton *)sender state] ==YES) {[ASIHTTPRequest setMaxBandwidthPerSecond:ASIWWANBandwidthThrottleAmount];} else {[ASIHTTPRequest setMaxBandwidthPerSecond:];}}

ASIHTTPRequest實現斷點下載