How to convert JSON serialized data to NSDictionary in Objective C? - ios

Question

I Have Used the following method to convert data to dictionary in my App but it shows json object was nil.
It's printing "jsonObject is null".
Is there any problem with "error:nil".
- (void)postNonceToServer:(NSString *)paymentMethodNonce {
// Update URL with your server
AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
manager.responseSerializer = [AFHTTPResponseSerializer serializer];
manager.responseSerializer.acceptableContentTypes = [manager.responseSerializer.acceptableContentTypes setByAddingObject:#"text/html"];
NSDictionary *parameters = #{#"payment_method_nonce":paymentMethodNonce,#"amount":amountStr,#"tripid":tripIdStr,#"currencycode":currencyStr};
[manager POST:#"http:url.php" parameters:parameters success:^(AFHTTPRequestOperation *operation, id responseObject) {
//NSArray *response = responseObject;
//response = responseObject;
NSLog(#"responseObject is %#",responseObject);
jsonObject=[NSJSONSerialization
JSONObjectWithData:responseObject
options:NSJSONReadingMutableLeaves
error:nil];
NSLog(#"jsonObject is %#",jsonObject);
}
failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSLog(#"Error: %#", error);
}];
}

Answer 1

Here, I am using AFNetworking 3.0. So i will give you "POST" method code in AFNetworking 3.0 version.
Step 1 :- Create one NSObject Class and write down this method in .h file.
+ (void)requestPostUrl: (NSString *)serviceName parameters:(NSDictionary *)dictParams success:(void (^)(NSDictionary *responce))success failure:(void (^)(NSError *error))failure;
Step 2 :- Write down this code in .m file
here "kBaseURL" means Web service URL and "serviceName" name of service.
+ (void)requestPostUrl: (NSString *)serviceName parameters:(NSDictionary *)dictParams success:(void (^)(NSDictionary *responce))success failure:(void (^)(NSError *error))failure {
AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
[manager.requestSerializer setValue:#"application/json" forHTTPHeaderField:#"Content-Type"];
[manager.requestSerializer setQueryStringSerializationWithBlock:^NSString * _Nonnull(NSURLRequest * _Nonnull request, id _Nonnull parameters, NSError * _Nullable __autoreleasing * _Nullable error) {
//Here your data converting in JSON.
NSData *jsonData = [NSJSONSerialization dataWithJSONObject:parameters options:NSJSONWritingPrettyPrinted error:error];
NSString *argString = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
return argString;
}];
NSString *strService = [NSString stringWithFormat:#"%#%#",kBaseURL,serviceName];
[manager setResponseSerializer:[AFHTTPResponseSerializer serializer]];
//[SVProgressHUD showWithStatus:#"Please wait..."];
[SVProgressHUD show];
[manager POST:strService parameters:dictParams progress:nil success:^(NSURLSessionDataTask * _Nonnull task, id _Nullable responseObject) {
if([responseObject isKindOfClass:[NSDictionary class]]) {
if(success) {
[SVProgressHUD dismiss];
success(responseObject);
}
}
else
{
NSDictionary *response = [NSJSONSerialization JSONObjectWithData:responseObject options:NSJSONReadingAllowFragments error:nil];
if(success) {
[SVProgressHUD dismiss];
NSLog(#"POST Response : %#",response);
success(response);
}
}
} failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
if(failure) {
[SVProgressHUD dismiss];
failure(error);
}
}];
}