How to create and post json to web service Objective c - objective-c

Question

I try to convertNSDictionary to JSON data and sent it to PHP.server in "POST" request with setHTTPBody.
I received a null from the server when I sent from my app, but when I send the JSON from PostMan I receive the objects.
Where am I wrong ?
- (void)viewDidLoad
{
[super viewDidLoad];
NSError *error = nil;
NSString *url = [NSString stringWithFormat:#"http://myAddress/sql_service.php"];
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:[NSURL URLWithString:url]];
[request setHTTPMethod:#"POST"];
[request setValue:#"application/json" forHTTPHeaderField:#"Content-Type"];
[request setValue:#"application/json" forHTTPHeaderField:#"Accept"];
NSArray *arrayOfStrings = #[#"alex",#"dima"];
NSDictionary *dict = #{#"request_type" : #"select_with_params",
#"table" : #"user",
#"where" : #"f_name=? OR f_name=?",
#"values" : arrayOfStrings};
NSData* jsonData1 = [NSJSONSerialization dataWithJSONObject:dict options:kNilOptions error:&error];
[request setHTTPBody:jsonData1];
NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:self];
[connection start];
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
if (data)
{
[receivedData appendData:data];
}
else
{
}
}
- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
NSLog(#"didFailWithError");
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
NSError * error = nil;
NSMutableDictionary *dictionary = [NSJSONSerialization JSONObjectWithData:receivedData options:0 error:&error];
NSLog(#"connectionDidFinishLoading");
}
this is the json i need to post.
{
request_type: "select_with_params",
table: "user",
where: "f_name=? OR f_name=?",
values: ["dima", "alex"]
}
jsonData1 is not nil.
the data in didReceiveData is :

Answer 1

Try AFNetworking
EDIT
NSString *url = [NSString stringWithFormat:#"http://myAddress/sql_service.php"];
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:[NSURL URLWithString:url]];
[request setHTTPMethod:#"POST"];
[request setValue:#"application/json" forHTTPHeaderField:#"Content-Type"];
[request setValue:#"application/json" forHTTPHeaderField:#"Accept"];
NSArray *arrayOfStrings = #[#"alex",#"dima"];
NSDictionary *dict = #{#"request_type" : #"select_with_params",
#"table" : #"user",
#"where" : #"f_name=? OR f_name=?",
#"values" : arrayOfStrings};
NSData* jsonData1 = [NSJSONSerialization dataWithJSONObject:dict options:kNilOptions error:&error];
[request setHTTPBody: [[NSString stringWithFormat:#"%#", jsonData1] dataUsingEncoding:NSUTF8StringEncoding]];
AFHTTPRequestOperation *op = [[AFHTTPRequestOperation alloc] initWithRequest:request];
op.responseSerializer = [AFJSONResponseSerializer serializer];
[op setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject){
if (responseObject)
{
NSLog(#"Success!");
}} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSLog(#"Error");
}];
[op start];
Hope this helps