send JSON object in POST request AFNetworking , iOS - ios

Question

I'm using AFNetworking to post data into the web. The information I have is the URI which is baseURL/post_user_info and they want input as A JSON object containing each of the name-value pairs. In the code written below I've set the name-value pair in a dictionary. My question is how to make it's json and send it as input value?
NSString *string = [NSString stringWithFormat:#"%#?post_user_info",BaseURLString];
NSString *escapedPath = [string stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet URLQueryAllowedCharacterSet]];
AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
NSDictionary *params = #{#"input_1": #"hello world",
#"input_2": #"my#you.com",
#"input_3": #"newworldorder"};
NSData* jsonData = [NSJSONSerialization dataWithJSONObject:params options:kNilOptions error:nil];
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
[request setHTTPMethod:#"POST"];
[request setValue:#"application/json" forHTTPHeaderField:#"Content-Type"];
[request setValue:#"application/json" forHTTPHeaderField:#"Accept"];
[request setHTTPBody:jsonData];
[manager POST:escapedPath parameters:[[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding] progress:nil success:^(NSURLSessionTask *task, id responseObject)
{
NSLog(#"%#",responseObject);
}failure:^(NSURLSessionTask *operation, NSError *error)
{
NSLog(#"%#",[error localizedDescription]);
}];
I've updated the code because now I have generated the JSON but if I run the code now it give me Error: 400 which means If input_values is empty, a bad request error will be output.

Answer 1

#interface AFJSONRequestSerializer : AFHTTPRequestSerializer
AFJSONRequestSerializeris a subclass ofAFHTTPRequestSerializerthat encodes parameters as JSON using NSJSONSerialization.
add this AFJSONRequestSerializer is used for send JSON not a Raw Data add this and try once
manager.responseSerializer = [AFHTTPResponseSerializer serializer];
manager.requestSerializer = [AFJSONRequestSerializer serializer];
e.g
NSString *string = [NSString stringWithFormat:#"%#?post_user_info",BaseURLString];
NSString *escapedPath = [string stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet URLQueryAllowedCharacterSet]];
/************** karthik Code added ******************/
AFHTTPSessionManager* manager = [[AFHTTPSessionManager alloc] initWithSessionConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration]];
manager.responseSerializer = [AFHTTPResponseSerializer serializer];
manager.requestSerializer = [AFJSONRequestSerializer serializer];
/************** karthik Code added ******************/
NSDictionary *params = #{#"1": #"hello world",
#"2": #"my#you.com",
#"3": #"newworldorder"};
[manager POST:escapedPath parameters:params progress:nil success:^(NSURLSessionTask *task, id responseObject)
{
NSLog(#"%#",responseObject);
NSError *error = nil;
NSDictionary *json = [NSJSONSerialization JSONObjectWithData:responseObject options:0 error:nil];
NSLog(#"json == %#", json);
} failure:^(NSURLSessionTask *operation, NSError *error) {
NSLog(#"%#", [error localizedDescription]);
}];
Update Params
NSDictionary *params = #{#"1": #"hello world",
#"2": #"my#you.com",
#"3": #"newworldorder"};
NSMutableDictionary *modify = [NSMutableDictionary new];
[modify setObject:params forKey:#"input_values"];
you get output of