UIlabel text not getting update when download files in progress - ios

Question

I am trying to update the `UILabel` i.e downloaded data and remeaning data to be downloaded estimated time and total size of the downloading files via `NSnotificationCenter`, but not being updated `UILabel` text Please help me on this.
Also tried putting the `NSnotificationCenter` block in the main thread but no result found.
I have tried like this:
- (AFHTTPRequestOperation )downloadMediaOperation:(ILSCDowloadMedia )media success:(void (^)(ILSCDowloadMedia *media))success {
if (media.mediaUrl.length == 0) nil;
__block NSString *mediaKey = [[NSUserDefaults standardUserDefaults] objectForKey:media.mediaUrl];
NSURL *url = [NSURL URLWithString:media.mediaUrl];
if (mediaKey.length == 0) {
mediaKey = [NSString stringWithFormat:#"%#.%#", [ILSCUtility createUUID], [[[url path] lastPathComponent] pathExtension]];
}
NSFileManager *fileManager= [NSFileManager defaultManager];
NSString *mediaFilePath = NIPathForDocumentsResource(mediaKey);
media.mediaFilePath = mediaFilePath; if (![fileManager fileExistsAtPath:mediaFilePath]) {
__weak ILSCSyncManager *weakSelf = self;
NSURLRequest *request = [self.HTTPClient requestWithMethod:#"GET" path:[url path] parameters:nil];
AFHTTPRequestOperation *downLoadOperation = [[AFHTTPRequestOperation alloc] initWithRequest:request];
downLoadOperation.downloadSpeedMeasure.active = YES; [downLoadOperation setShouldExecuteAsBackgroundTaskWithExpirationHandler:^{
// Clean up anything that needs to be handled if the request times out
// It may be useful to initially check whether the operation finished or was cancelled
}];
downLoadOperation.outputStream = [NSOutputStream outputStreamToFileAtPath:mediaFilePath append:NO];
[downLoadOperation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {
[[NSUserDefaults standardUserDefaults] setObject:mediaKey forKey:media.mediaUrl];
[[NSUserDefaults standardUserDefaults] synchronize];
if (success) {
success(media);
}
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NIDERROR(#"y error %#", [error localizedDescription]);
__strong ILSCSyncManager *strongSelf = weakSelf;
strongSelf.numberOfDownloadErrors++;
}];
[downLoadOperation setDownloadProgressBlock:^(NSUInteger bytesRead, long long totalBytesRead, long long totalBytesExpectedToRead)
{
NSLog(#"vvv Byted total expected to read %f",totalImagesBytesExpectedToRead);
totalImagesBytesRead += bytesRead;
humanReadableSpeed = downLoadOperation.downloadSpeedMeasure.humanReadableSpeed;
humanReadableRemaingTime = [downLoadOperation.downloadSpeedMeasure humanReadableRemainingTimeOfTotalSize:totalImagesBytesExpectedToRead numberOfCompletedBytes:totalImagesBytesRead];
NSLog(#"Speed Human %#",humanReadableSpeed);
NSLog(#"Time is human read %#",humanReadableRemaingTime);
dispatch_async(dispatch_get_main_queue(), ^{
[[NSNotificationCenter defaultCenter] postNotificationName:#"UpdateProgressBar" object:[NSString stringWithFormat:#"%#-%f-%f-%#", humanReadableSpeed,totalImagesBytesRead,totalImagesBytesExpectedToRead,humanReadableRemaingTime]];
});
}];
return downLoadOperation;
} else {
if (success) {
success(media);
}
}
return nil;
}
Please help me on this.
This is the listener of the NSnotification please check and please let me know.
I add this class as Loader while once down load starts.
I have gone through some of the sites as i got some information NSOperation queue is runs in the background thread . i am not sure on this please help me .
_observer = [[NSNotificationCenter defaultCenter] addObserverForName:#"UpdateProgressBar" object:nil queue:[NSOperationQueue mainQueue] usingBlock:^(NSNotification *note) {
NSString *str =[note object]; NSArray *arrayTotalOperationsIn = [str componentsSeparatedByString:#"-"];
NSLog(#"%#",arrayTotalOperationsIn); self.lblSpeedMeasure.text =[NSString stringWithFormat:#"Internet Speed - %#" ,[arrayTotalOperationsIn objectAtIndex:0]];
float bytesRead = [[arrayTotalOperationsIn objectAtIndex:1] floatValue];
float bytesExpectedToRead = [[arrayTotalOperationsIn objectAtIndex:2] floatValue];
NSString *timeExpectedToRead = [arrayTotalOperationsIn objectAtIndex:3];
self.progressCountTextLabel.text=[NSString stringWithFormat:#"%.2f MB/%.2f MB - %# Left",bytesRead/1000000,bytesExpectedToRead/1000000,timeExpectedToRead];
}];
The above is the listener of the NSnotification please check and please let me know.
I add this class as Loader while once down load starts.
I have gone through some of the sites as i got some information NSOperation queue is runs in the background thread . i am not sure on this please help me .

Answer 1

Try calling the setNeedsDisplay method on your UILabel after setting the text
[self.progressCountTextLabel setNeedsDisplay];