objective-c – AFNetworking暂停/恢复下载大文件

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我需要使用我的iPad应用程序下载大型.zip文件(最大800 MB).
如果取消下载或应用程序在后台,我想再次恢复下载. @H_301_3@operation = [[AFHTTPRequestOperation alloc] initWithRequest:request]; operation.outputStream = [NSOutputStream outputStreamToFileAtPath:filePath append:YES]; [operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation,id responSEObject){ // unzip the .zip }failure:^(AFHTTPRequestOperation *operation,NSError *error){ //Handle the error }]; [operation setDownloadProgressBlock:^(NSInteger bytesWritten,long long totalBytesWritten,long long totalBytesExpectedToWrite) { //update the progressView }]; [operation setShouldExecuteAsBackgroundTaskWithExpirationHandler:^{ // What I have to do here? }]; [operation start]; [operation waitUntilFinished]; -(void)applicationWillResignActive:(UIApplication *)application{ // What I have to do here? }

谢谢你的帮助.

解决方法

您可以使用AFDownloadRequestOperation执行此操作. @H_301_3@NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"....zip"]]; NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES); NSString *path = [[paths objectAtIndex:0] stringByAppendingPathComponent:@"....zip"]; AFDownloadRequestOperation *operation = [[AFDownloadRequestOperation alloc] initWithRequest:request targetPath:path shouldResume:YES]; [operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation,id responSEObject) { NSLog(@"Successfully downloaded file to %@",path); } failure:^(AFHTTPRequestOperation *operation,NSError *error) { NSLog(@"Error: %@",error); }]; [operation setProgressiveDownloadProgressBlock:^(NSInteger bytesRead,long long totalBytesRead,long long totalBytesExpected,long long totalBytesReadForFile,long long totalBytesExpectedToReadForFile) { NSLog(@"Operation%i: bytesRead: %d",1,bytesRead); NSLog(@"Operation%i: totalBytesRead: %lld",totalBytesRead); NSLog(@"Operation%i: totalBytesExpected: %lld",totalBytesExpected); NSLog(@"Operation%i: totalBytesReadForFile: %lld",totalBytesReadForFile); NSLog(@"Operation%i: totalBytesExpectedToReadForFile: %lld",totalBytesExpectedToReadForFile); }]; [operations addObject:operation];

重新启动应用程序并生成具有相同URL的请求后,它将继续下载.“shouldResume:YES”有效

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