Delays between a sprites position change - objective-c

Question

Right now I have a NSArray with x amount of coordinates inside; I have a sprite that needs to go to each of the points to go along the selected path. I tried using a for loop, but that does it in such quick succession that it appears to just teleport to the final destination. I've tried a with selectors but I can't get those to work either. Anyone know how to do this?

Answer 1

you have to use an NSTimer
#implementation whatever
{
int count;
NSTimer *myTimer;
CCSprite *mySprite;
NSArray *locationArray;
}
and then start the timer fromsomewhere...
count=0
//1.0 is one second, so change it to however long you want to wait between position changes
myTimer = [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:#selector(movealong) userInfo:nil repeats:YES];
And then it calls this until it goes through all the object
-(void)movealong{
//assuming array is full of CGPoints...
//mySprite.position = [locationArray objectAtIndex:count];
//try this then
CGPoint newPoint = [locationArray objectAtIndex:count];
mySprite.position = ccp(newPoint.x,newPoint.y);
//I think maybe THIS is what you need to do to make it work...
//if you want it to not jump directly there
//you can also use CCMoveTo
/*// under actionWithDuration: put the same amount of time or less of what you had
// under scheduledTimerWithTimeInterval in your NSTimer
CCFiniteTimeAction *newPos = [CCMoveTo actionWithDuration:1.0 position:[locationArray objectAtIndex:count]];
[mySprite runAction:newPos];
*/
count++;
if(count >= locationArray.count){
[myTimer invalidate];
myTimer = nil;
}
}

Answer 2

Create a method that will place your sprite to position that is at some index (for example, _i) in the positions array. And at the end of this method call it again with delay, using CCDelayTime and CCCallFunc actions in sequence. And do not forget to increment index. Smth like
// somewhere in code to start move
_i = 0;
[self setNewPosition];
// method that will set the next position
- (void) setNewPosition
{
sprite.position = // get position at index _i from your array here
_i++;
BOOL needSetNextPosition = // check if _i is inside bounds of your positions array
if( needSetNextPosition )
{
id delay = [CCDelayTime actionWithDuration: delayBetweenUpdate];
id callback = [CCCallFunc actionWithTarget: self selector: #selector(setNewPosition)];
id sequence = [CCSequence actionOne: delay two: callback];
[self runAction = sequence];
}
}
This is just example, but I hope, you can adapt it for your needs.