Get MBProgressHUD's progress from NSURL - ios

Question

I am trying to calculate the progress of my download method and show MBProgressHUD's progress during file is downloading , but I don't know how to calculate the progress float ! here is my code :
- (IBAction)preview:(id)sender {
HUD = [[MBProgressHUD alloc] initWithView:self.navigationController.view];
[self.navigationController.view addSubview:HUD];
// Set determinate mode
HUD.mode = MBProgressHUDModeAnnularDeterminate;
HUD.delegate = self;
HUD.labelText = #"Loading";
// myProgressTask uses the HUD instance to update progress
[HUD showWhileExecuting:#selector(downloadDataFromMac) onTarget:self withObject:nil animated:YES];
}
- (void)downloadData {
NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];
AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:configuration];
NSURL *URL = [NSURL URLWithString:pathWithData];
NSURLRequest *request = [NSURLRequest requestWithURL:URL];
NSURLSessionDownloadTask *downloadTask = [manager downloadTaskWithRequest:request progress:nil destination:^NSURL *(NSURL *targetPath, NSURLResponse *response) {
NSURL *documentsDirectoryURL = [[NSFileManager defaultManager] URLForDirectory:NSDocumentDirectory inDomain:NSUserDomainMask appropriateForURL:nil create:NO error:nil];
return [documentsDirectoryURL URLByAppendingPathComponent:[response suggestedFilename]];
} completionHandler:^(NSURLResponse *response, NSURL *filePath, NSError *error) {
NSLog(#"File downloaded to: %#", filePath);
//Hide HUD
[HUD hide:YES];
self.documentInteractionController = [UIDocumentInteractionController interactionControllerWithURL:filePath];
[self.documentInteractionController setDelegate:self];
[self.documentInteractionController presentPreviewAnimated:YES];
}];
[downloadTask resume];
}
EDITED :
- (void)downloadDataFromMac {
NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];
AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:configuration];
NSURL *URL = [NSURL URLWithString:pathWithData];
NSURLRequest *request = [NSURLRequest requestWithURL:URL];
NSProgress *progress;
NSURLSessionDownloadTask *downloadTask = [manager downloadTaskWithRequest:request progress:&progress destination:^NSURL *(NSURL *targetPath, NSURLResponse *response) {
[progress addObserver:self
forKeyPath:#"fractionCompleted"
options:NSKeyValueObservingOptionNew
context:NULL];
NSURL *documentsDirectoryURL = [[NSFileManager defaultManager] URLForDirectory:NSDocumentDirectory inDomain:NSUserDomainMask appropriateForURL:nil create:NO error:nil];
return [documentsDirectoryURL URLByAppendingPathComponent:[response suggestedFilename]];
} completionHandler:^(NSURLResponse *response, NSURL *filePath, NSError *error) {
NSLog(#"File downloaded to: %#", filePath);
//Hide HUD
[HUD hide:YES];
self.documentInteractionController = [UIDocumentInteractionController interactionControllerWithURL:filePath];
[self.documentInteractionController setDelegate:self];
[self.documentInteractionController presentPreviewAnimated:YES];
}];
[downloadTask resume];
}
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context{
if ([keyPath isEqualToString:#"fractionCompleted"]) {
NSProgress *progress = (NSProgress *)object;
NSLog(#"Progress… %f", progress.fractionCompleted);
//do something with your progress here, for eg :
//but dont forget to first make HUD a class property so you can update it
[HUD setProgress:progress.fractionCompleted];
} else {
[super observeValueForKeyPath:keyPath ofObject:object change:change context:context];
}
}

Answer 1

You can use RSNetworkKit. It has all handy methods for all network related calls, download and upload files with progress. It has internally implemented AFNetworking.
https://github.com/rushisangani/RSNetworkKit
RSDownlaodManager has a method to download any file with progress
you can simple use like this.
[[RSDownloadManager sharedManager] downloadWithURL:#"URLString" downloadProgress:^(NSNumber *progress) {
// show progress using HUD here
// must use main thread to show progress or update UI.
} success:^(NSURLResponse *response, NSURL *filePath) {
} andFailure:^(NSError *error) {
}];

Answer 2

You can add an NSProgress property to the NSURLSessionDownloadTask definition, and then you can observe that property using KVO. So just before you create the download task, create the property and add it to the definition, like this :
NSProgress *progress;
NSURLSessionDownloadTask *downloadTask = [manager downloadTaskWithRequest:request progress:&progress destination:^NSURL *(NSURL *targetPath, NSURLResponse *response) {
NSURL *documentsDirectoryURL = [[NSFileManager defaultManager] URLForDirectory:NSDocumentDirectory inDomain:NSUserDomainMask appropriateForURL:nil create:NO error:nil];
return [documentsDirectoryURL URLByAppendingPathComponent:[response suggestedFilename]];
} completionHandler:^(NSURLResponse *response, NSURL *filePath, NSError *error) {
NSLog(#"File downloaded to: %#", filePath);
//Hide HUD
[HUD hide:YES];
self.documentInteractionController = [UIDocumentInteractionController interactionControllerWithURL:filePath];
[self.documentInteractionController setDelegate:self];
[self.documentInteractionController presentPreviewAnimated:YES];
}];
[progress addObserver:self
forKeyPath:#"fractionCompleted"
options:NSKeyValueObservingOptionNew
context:NULL];
[downloadTask resume];
Then to observe that progress property as it changes, add this method to your class :
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context{
if ([keyPath isEqualToString:#"fractionCompleted"]) {
NSProgress *progress = (NSProgress *)object;
NSLog(#"Progress… %f", progress.fractionCompleted);
//do something with your progress here, for eg :
//but dont forget to first make HUD a class property so you can update it
[self.hud setProgress:progress.fractionCompleted];
} else {
[super observeValueForKeyPath:keyPath ofObject:object change:change context:context];
}
}