서버에 JSON 데이터 보내기

#pragma     :  JSON          JSON    
- (void)POSTJSON_01
{
    NSString *jsonStr = @"{\"name\":\"    \"}";

    //  JSON          JSON    
    NSData *jsonData = [jsonStr dataUsingEncoding:NSUTF8StringEncoding];
    [self postJsonWith:jsonData];
}

#pragma     :        JSON      
- (void)POSTJSON_02
{
    NSDictionary *dict = [NSDictionary dictionaryWithObject:@"  " forKey:@"name"];

    //        JSON      
    NSData *jsonData = [NSJSONSerialization dataWithJSONObject:dict options:0 error:NULL];
    [self postJsonWith:jsonData];
}

#pragma     :        JSON      
- (void)POSTJSON_03
{
    NSDictionary *dict1 = [NSDictionary dictionaryWithObject:@"  " forKey:@"name"];
    NSDictionary *dict2 = [NSDictionary dictionaryWithObject:@"   " forKey:@"name"];
    NSArray *arr = @[dict1,dict2];

    //        JSON      
    NSData *jsonData = [NSJSONSerialization dataWithJSONObject:arr options:0 error:NULL];
    [self postJsonWith:jsonData];
}

#pragma   json          ,  json      
- (void)postJsonWith:(NSData *)jsonData
{
    // URL
    NSURL *URL = [NSURL URLWithString:@"http://localhost/php/upload/postjson.php"];
    //   
    NSMutableURLRequest *requestM = [NSMutableURLRequest requestWithURL:URL];
    //       
    requestM.HTTPMethod = @"POST";
    //      
    requestM.HTTPBody = jsonData;

    //     
    [[[NSURLSession sharedSession] dataTaskWithRequest:requestM completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
        //     
        if (error == nil && data != nil) {

            //     
            NSString *str = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
            NSLog(@"%@",str);

        } else {
            NSLog(@"%@",error);
        }
    }] resume];
}