The NSDATA is not writing into Documents Dir, when iPhone on Background mode with Locked State?

Question

I tried following methods:

2. In Appdelegate.m

    -(void)applicationDidEnterBackground:(UIApplication *)application { __block UIBackgroundTaskIdentifier taskId = 0; taskId = [application beginBackgroundTaskWithExpirationHandler:^{ taskId = UIBackgroundTaskInvalid; }]; } 

3. Actually I am using NSURLSession to download the File

    -(void)methodForDownloadTheFile:(NSString *)fileName { // 1 NSString *fileApi = @"https://api-content.dropbox.com/1/files/dropbox"; NSString *escapedPath = [fileName stringByAddingPercentEscapesUsingEncoding: NSUTF8StringEncoding]; NSString *urlStr = [NSString stringWithFormat: @"%@/%@", fileApi,escapedPath]; NSURL *url = [NSURL URLWithString: urlStr]; [UIApplication sharedApplication].networkActivityIndicatorVisible = YES; if (self.dataTask) { [self.dataTask cancel]; } // 2 self.dataTask =[_session dataTaskWithURL:url completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) { if (!error) { NSHTTPURLResponse *httpResp = (NSHTTPURLResponse*) response; if (httpResp.statusCode == 200) { // 3 // [_filleddata appendData:data]; NSString *documentsPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0]; NSString *localPath = [documentsPath stringByAppendingPathComponent:fileName]; if( [data writeToFile:localPath atomically:YES]) { NSLog(@"HOpefully written into Documentz directory.."); } else { NSLog(@"Writting file mechanism - Failed!"); } dispatch_async(dispatch_get_main_queue(), ^{ [UIApplication sharedApplication].networkActivityIndicatorVisible = NO; NSLog(@"Downloaded Successfully"); }); } else { // HANDLE BAD RESPONSE // } } else { // ALWAYS HANDLE ERRORS :-] // } // 4 }] ; if (self.dataTask) { [self.dataTask resume]; } } 

And Even The Delegate - Downloading Progress ALSO NOT getting fired...

-(void)URLSession:(NSURLSession *)session
     downloadTask:(NSURLSessionDownloadTask *)downloadTask
     didWriteData:(int64_t)bytesWritten
totalBytesWritten:(int64_t)totalBytesWritten
totalBytesExpectedToWrite:(int64_t)totalBytesExpectedToWrite
{
  NSLog(@"%f / %f", (double)totalBytesWritten,
    (double)totalBytesExpectedToWrite);
}

Answer 1

You have data protection enabled in your capabilities, so the documents directory will not be accessible while the device is locked unless you flag it appropriately .

Have a look at NSFileProtectionNone attribute and the setAttributes:ofItemAtPath:error: method in NSFileManager .

Or, if you don't require data protection (ie the data in your app isn't considered sensitive) turn off the data protection capability.