Replace NSURLConnection with NSURLSession to download and parse json feed - mysql

Question

I'm a beginner in the area to work with database on iOS. However I could find a way to connect to a MySQL database, download and parse the json feed. Now in iOS 9, I can't use NSURLConnection anymore, that's why I have to replace it with NSURLSession. I saw many tutorials for example this here. So far, I was not able to replace it. Because I'm under time pressure, I can't waste more time to do this. Is here anyone who could help me to replace it?
My code looks exactly like this:
- (void)downloadItems
{
// Download the json file
NSURL *jsonFileUrl = [NSURL URLWithString:#"http://myhost.ch/test.php"];
// Create the request
NSURLRequest *urlRequest = [[NSURLRequest alloc] initWithURL:jsonFileUrl];
// Create the NSURLConnection
[NSURLConnection connectionWithRequest:urlRequest delegate:self];
}
#pragma mark NSURLConnectionDataProtocol Methods
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
// Initialize the data object
_downloadedData = [[NSMutableData alloc] init];
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
// Append the newly downloaded data
[_downloadedData appendData:data];
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
// Create an array to store the locations
NSMutableArray *_locations = [[NSMutableArray alloc] init];
// Parse the JSON that came in
NSError *error;
NSArray *jsonArray = [NSJSONSerialization JSONObjectWithData:_downloadedData options:NSJSONReadingAllowFragments error:&error];
// Loop through Json objects, create question objects and add them to our questions array
for (int i = 0; i < jsonArray.count; i++)
{
NSDictionary *jsonElement = jsonArray[i];
// Create a new location object and set its props to JsonElement properties
Location *newLocation = [[Location alloc] init];
newLocation.idS = jsonElement[#"idStatistic"];
newLocation.temp = jsonElement[#"temp"];
newLocation.hum = jsonElement[#"hum"];
newLocation.date_time = jsonElement[#"date_time"];
// Add this question to the locations array
[_locations addObject:newLocation];
}
// Ready to notify delegate that data is ready and pass back items
if (self.delegate)
{
[self.delegate itemsDownloaded:_locations];
}
}

Answer 1

You can try this,
{
NSURL *url = [NSURL URLWithString:#"http://myhost.ch/test.php"];
NSMutableURLRequest *theRequest = [NSMutableURLRequest requestWithURL:url];
[theRequest setHTTPMethod:#"POST"];
NSURLSession *session = [NSURLSession sharedSession];
NSURLSessionDataTask *task = [session dataTaskWithRequest:theRequest
completionHandler:
^(NSData *data, NSURLResponse *response, NSError *error) {
responseDict = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:&error];
NSLog(#"Result:%#", responseDict);
}];
[task resume];
}