If you want to add a custom delegate class, you need to implement the NSURLSessionDataDelegate
and NSURLSessionTaskDelegate
protocols at the minimum.
With the methods:
NSURLSessionDataDelegate - get continuous status of your request
- (void)URLSession:(NSURLSession *)session dataTask:(NSURLSessionDataTask *)dataTask didReceiveResponse:(NSURLResponse *)response
completionHandler:(void (^)(NSURLSessionResponseDisposition disposition))completionHandler {
receivedData=nil; receivedData=[[NSMutableData alloc] init];
[receivedData setLength:0];
completionHandler(NSURLSessionResponseAllow);
}
NSURLSessionDataDelegate
-(void)URLSession:(NSURLSession *)session dataTask:(NSURLSessionDataTask *)dataTask
didReceiveData:(NSData *)data {
[receivedData appendData:data];
}
NSURLSessionTaskDelegate
- (void)URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task
didCompleteWithError:(NSError *)error {
if (error) {
// Handle error
}
else {
NSDictionary* response=(NSDictionary*)[NSJSONSerialization JSONObjectWithData:receivedData options:kNilOptions error:&tempError];
// perform operations for the NSDictionary response
}
If you want to separate the delegate code (middle layer) from your calling class (generally its good practice to have separate class/layer for network calls), the delegate of NSURLSession has to be :-
NSURLSession *session=[NSURLSession sessionWithConfiguration:sessionConfig delegate:myCustomDelegateClass delegateQueue:nil];
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