Question

I’m trying to play animations in sequence but I’m having issues playing them as a for loop iterates through the list of objects in an array.

it will move through the array but it won’t play each one it just plays the last.

-(void) startGame {
    gramma.animationDuration = 0.5;

    // Repeat forever
    gramma.animationRepeatCount = 1;
    int r = arc4random() % 4;
    [colorChoices addObject:[NSNumber numberWithInt:r]];

    int anInt = [[colorChoices objectAtIndex:0] integerValue];
    NSLog(@"%d", anInt);
    for (int i = 0; i < colorChoices.count; i++) {

        [self StrikeFrog:[[colorChoices objectAtIndex:i] integerValue]];
        //NSLog(@"%d", [[colorChoices objectAtIndex:i] integerValue]);
        sleep(1);

    }
}

it moves through the whole cycle really fast and sleep isn’t doing anything to allow it to play each animation… any suggestions?

Answer 1

Use an NSTimer so the run loop has time to process. Drawing does not begin until after startGame returns.

Edit:

-(void) myTimerMethod:(NSTimer *)inTimer {
  if ( mPosition < [colorChoices count] ) {
    [self StrikeFrog:[[colorChoices objectAtIndex:mPosition] integerValue]];
    mPosition += 1;
  } else {
    [inTimer invalidate];
  }
}

To start it:

mPosition = 0;
[NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(myTimerMethod:) userInfo:nil repeats:YES];

If you need to be able to stop the timer midway through, retain a reference to it so you can invalidate it as needed.