How to call a method each second?

Question

I have a number-role nodes( 4 numbers nodes). I have created a method that changes the position of the nodes each time it called. I use scheduledTimerWithTimeInterval method to call the method each second. what I found when running the code is the older nodes did not remove. it keeps adding new nodes , within few minutes no of nodes becomes 100+. How to solve the problem? Is there any easy and short way to code for this? ``` -(id)initWithSize:(CGSize)size { if (self = [super initWithSize:size]) { /* Setup your scene here */

    SKSpriteNode *background = [SKSpriteNode spriteNodeWithImageNamed:@"background_1.png"];
    background.position = CGPointMake(CGRectGetMidX(self.frame), CGRectGetMidY(self.frame));
    [self addChild:background];


    //adding numbernode
    [NSTimer scheduledTimerWithTimeInterval: 5.0 target: self
                                   selector: @selector(numberNodes:) userInfo: nil repeats: YES];


    // feed button
    RAFeedButtonNode *feedButton = [RAFeedButtonNode feedButtonAtPosition:CGPointMake(CGRectGetMinX(self.frame)+30, CGRectGetMinY(self.frame)+120)];

    [self addChild:feedButton];

}
return self;

}

-(void)numberNodes:(NSTimer *)t{

NSArray *randomPositionArray = [NSArray arrayWithObjects:[NSNumber numberWithFloat:120.00],[NSNumber numberWithFloat:163.00],[NSNumber numberWithFloat:207.00],[NSNumber numberWithFloat:250.00], nil];




id randomObject = nil;
if ([randomPositionArray count] > 0){
    int randomIndex = arc4random()%[randomPositionArray count];
    randomObject = [randomPositionArray objectAtIndex:randomIndex];
}




//numberOne node
RANumberButtonNode *numberOne = [RANumberButtonNode spriteNodeWithImageNamed:@"number_1_button_1.png"];
numberOne.position =CGPointMake(CGRectGetMaxX(self.frame)-67, CGRectGetMinY(self.frame)+[randomObject floatValue]);
numberOne.name =@"NumberOne";

[self addChild:numberOne];

int i=0;
for (i=0; i<4; i++) {
    if (randomPositionArray[i]==randomObject) {
        i++;
    }
    //numberTwo node
    RANumberButtonNode *numberTwo = [RANumberButtonNode spriteNodeWithImageNamed:@"number_2_button_1.png"];
    numberTwo.position =CGPointMake(CGRectGetMaxX(self.frame)-67, CGRectGetMinY(self.frame)+[randomPositionArray[i] floatValue]);
    numberTwo.name =@"NumberTwo";

    [self addChild:numberTwo];

    i++;
    if (randomPositionArray[i]==randomObject) {
        i++;
    }
    //numberThree node
    RANumberButtonNode *numberThree = [RANumberButtonNode spriteNodeWithImageNamed:@"number_3_button_1.png"];
    numberThree.position =CGPointMake(CGRectGetMaxX(self.frame)-67, CGRectGetMinY(self.frame)+[randomPositionArray[i] floatValue]);
    numberThree.name =@"NumberThree";

    [self addChild:numberThree];

    i++;
    if (randomPositionArray[i]==randomObject) {
        i++;
    }

    //numberFour node
    RANumberButtonNode *numberFour = [RANumberButtonNode spriteNodeWithImageNamed:@"number_4_button_1.png"];
    numberFour.position =CGPointMake(CGRectGetMaxX(self.frame)-67, CGRectGetMinY(self.frame)+[randomPositionArray[i] floatValue]);
    numberFour.name =@"NumberFour";

    [self addChild:numberFour];

    i++;

}

}

@end

Answer 1 · 2014-08-19T06:41:58Z

August 19, 2014 6:41am

whats the maximum number of nodes you want? maybe you could add a mutable array to your scene that stores the nodes you add every second. each time you add a node, check and see if the count of that array is greater than the max number of nodes you want to have at once. if its greater than the max number you want, remove the first item in the array and then add the new node.

that might work. not 100% sure but you could try

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rishavatreya

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How to call a method each second?

rishavatreya

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1 Answer

Stone Preston

Stone Preston