File downloader Using NSURLSessionTask downloadTask - ios

Question

I want to create File download manager to download multiple files with download percent with play pause delete functionality .
I try below code to download multiple file successfully ...but unable to add progress bar please help
for (int i = 0; i < [arr_bookChapter count]; i++) {
NSURLSessionTask * downloadTask = [session downloadTaskWithURL: downloadfileUrl completionHandler: ^ (NSURL * location, NSURLResponse * response, NSError * error) {
if (error == nil) {
NSHTTPURLResponse * httpResponse = (NSHTTPURLResponse * ) response;
if ([httpResponse statusCode] == 200) {
//download file save here
dispatch_queue_t backgroundQueue = dispatch_queue_create("dispatch_queue_#1", 0);
dispatch_async(backgroundQueue, ^ {
dispatch_async(dispatch_get_main_queue(), ^ {
// NSError *error;
//download complete here
});
});
}
} else {
//faile
}
}];
[downloadTask resume];
}
Here i got swift code:
Can someone create or or provide solution for objective-C

Answer 1

You can easily do this, you just need to implement these delegates in your ViewContorller.
<NSURLSessionDataDelegate, NSURLSessionDelegate, NSURLSessionTaskDelegate>
And than you need to follow this code:
#property (nonatomic, retain) NSMutableData *dataToDownload;
#property (nonatomic) float downloadSize;
- (void)viewDidLoad {
[super viewDidLoad];
NSURLSessionConfiguration *defaultConfigObject = [NSURLSessionConfiguration defaultSessionConfiguration];
NSURLSession *defaultSession = [NSURLSession sessionWithConfiguration: defaultConfigObject delegate: self delegateQueue: [NSOperationQueue mainQueue]];
NSURL *url = [NSURL URLWithString: #"your url"];
NSURLSessionDataTask *dataTask = [defaultSession dataTaskWithURL: url];
[dataTask resume];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (void)URLSession:(NSURLSession *)session dataTask:(NSURLSessionDataTask *)dataTask didReceiveResponse:(NSURLResponse *)response completionHandler:(void (^)(NSURLSessionResponseDisposition disposition))completionHandler {
completionHandler(NSURLSessionResponseAllow);
progressBar.progress=0.0f;
_downloadSize=[response expectedContentLength];
_dataToDownload=[[NSMutableData alloc]init];
}
- (void)URLSession:(NSURLSession *)session dataTask:(NSURLSessionDataTask *)dataTask didReceiveData:(NSData *)data {
[_dataToDownload appendData:data];
progressBar.progress=[ _dataToDownload length ]/_downloadSize;
}