NSMutableArray returns empty - ios

Question

I am writing a simple program that, I display a number from array 1 on a label and then move the number to array 2. However, the array keeps returning empty.
Here's my code.
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
[self firstArrayInit];
[self secondArrayInit];
[self tranferA1toA2];
}
-(NSMutableArray *) firstArrayInit{
self.originalArray = [NSMutableArray array];
for (int i=0; i<16; i++) {
[self.originalArray addObject:[NSNumber numberWithInteger:i]];
}
return self.originalArray;
}
-(NSMutableArray *)secondArrayInit{
self.secondArray = [NSMutableArray array];
return self.secondArray;
}
-(void) tranferA1toA2{
self.mytimer = [NSTimer scheduledTimerWithTimeInterval:2
target:self
selector:#selector(displayNumber)
userInfo:nil
repeats:YES];
}
-(NSMutableArray *)addToSecondArray:(int)myNumber{
[self.secondArray addObject:[self.originalArray objectAtIndex:myNumber]];
return self.secondArray;
}
-(void) displayNumber{
static int num=0;
if (num < level){
myLabel.text = [NSString stringWithFormat:#"%#", [self.originalArray objectAtIndex:num]];
[self addToSecondArray:num];
}
else{
[self.mytimer invalidate];
[myLabel setText:#""];
}
num++;
}
I've tried printing out the values in array 2 from displayNumber and it works. But, outside the function the array is empty.

Answer 1

Your code works as it is supposed to. The problem is that you check the array too early, even before the timer is fired for the first time. Check the array after the timer is invalidated