IOS 학습의 길 19(JSON과 Arrays 또는 Dictionaries 상호 전환)

 //dictionary    json
    NSMutableDictionary *dictionary = [[NSMutableDictionary alloc] init];
    [dictionary setValue:@"Anthony"forKey:@"First Name"];
    [dictionary setValue:@"Robbins"forKey:@"Last Name"];
    [dictionary setValue:[NSNumber numberWithUnsignedInteger:51]forKey:@"Age"];
    NSArray *arrayOfAnthonysChildren = [[NSArray alloc]
                                        initWithObjects:
                                        @"Anthony's Son 1", @"Anthony's Daughter 1", @"Anthony's Son 2", @"Anthony's Son 3", @"Anthony's Daughter 2",nil];
    [dictionary setValue:arrayOfAnthonysChildren forKey:@"children"];
    NSError *error = nil;
    //      json data。。。。。。。。。。。。。。。。。。。。。。。
    NSData *jsonData = [NSJSONSerialization dataWithJSONObject:dictionary
                                                       options:NSJSONWritingPrettyPrinted
                                                         error:&error];
    if ([jsonData length] > 0 && error == nil){
        NSLog(@"         .");
        // json     String  
        NSString *jsonString = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
        NSLog(@"JSON String = %@", jsonString);
        
     //  JSON       Arrays    Dictionaries    
    //    。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。
        id jsonObject = [NSJSONSerialization
                         JSONObjectWithData:jsonData options:NSJSONReadingAllowFragments
                         error:&error];
        if (jsonObject != nil && error == nil){
            NSLog(@"      ...");
            if ([jsonObject isKindOfClass:[NSDictionary class]]){
                NSDictionary *deserializedDictionary = (NSDictionary *)jsonObject;
                NSLog(@"      dictionary   = %@", deserializedDictionary);
            }
            else if ([jsonObject isKindOfClass:[NSArray class]]){
                NSArray *deserializedArray = (NSArray *)jsonObject;
                NSLog(@"    json     = %@", deserializedArray);
            }else {
                
            }
        
        }else if (error != nil){
            NSLog(@"           ");
        }
        
    } else if ([jsonData length] == 0 && error == nil){
       NSLog(@"          ");
    }else if (error != nil){
      NSLog(@"  ： %@", error);
    }