iOS Objective-C : How to create NSMutableArray Dynamically?

NSMutableDictionary *myArrays;

NSMutableArray *newArray = [[NSMutableArray alloc] init];
[myArrays addObject:newArray forKey:someLabel1.text];
[myArrays addObject:newArray forKey:someLabel2.text];
[myArrays addObject:newArray forKey:someLabel3.text];

/*** Create JSON ***/

// A dictionary object
NSDictionary *dict;

NSMutableArray *myObject;

// Define keys
NSString *memberid;
NSString *name;
NSString *tel;

// Define keys
memberid = @"MemberID";
name = @"Name";
tel = @"Tel";


// Create array to hold dictionaries
myObject = [[NSMutableArray alloc] init];

dict = [NSDictionary dictionaryWithObjectsAndKeys:
        @"1", memberid,
        @"Weerachai", name,
        @"0819876107", tel,
        nil];
[myObject addObject:dict];


dict = [NSDictionary dictionaryWithObjectsAndKeys:
        @"2", memberid,
        @"Win", name,
        @"021978032", tel,
        nil];
[myObject addObject:dict];


dict = [NSDictionary dictionaryWithObjectsAndKeys:
        @"3", memberid,
        @"Eak", name,
        @"087654321", tel,
        nil];
[myObject addObject:dict];

NSData *jsonData = [NSJSONSerialization dataWithJSONObject:myObject
                                                   options:NSJSONWritingPrettyPrinted
                                                     error:nil];

// Resutl
// [{ "MemberID":"1", "Name":"Weerachai", "Tel":"0819876107" }, { "MemberID":"2", "Name":"Win", "Tel":"021978032" }, { "MemberID":"3", "Name":"Eak", "Tel":"087654321" }]


/*** Read JSON ***/
id jsonObjects = [NSJSONSerialization JSONObjectWithData:jsonData options:NSJSONReadingMutableContainers error:nil];

// values in foreach loop
for (NSDictionary *dataDict in jsonObjects) {
    NSString *strMemberID = [dataDict objectForKey:@"MemberID"];
    NSString *strName = [dataDict objectForKey:@"Name"];
    NSString *strTel = [dataDict objectForKey:@"Tel"];
    NSLog(@"MemberID = %@",strMemberID);
    NSLog(@"Name = %@",strName);
    NSLog(@"Tel = %@",strTel);
    
    NSLog(@"====================");
}