How to call sprite sheet animation: cocos2d

To add sprites from spritesheet and animating the frames, you can use the following code:

in .h:

        CCSprite *sprite_1;
        NSMutableArray *spriteAnimArray;

in .m:

    //In init method, add sprite frames from plist file
 
        [[CCSpriteFrameCache sharedSpriteFrameCache] addSpriteFramesWithFile:@"plistName.plist"]; 
         sprite_1 =[CCSprite spriteWithSpriteFrameName:@"sprite1.png"];
        sprite_1.position = ccp(240,240);
        [self addChild:sprite_1 z:2];

        [self spriteAnimation];        // call sprite animation function


  //SpriteAnimation function

    -(void)spriteAnimation{
        spriteAnimArray = [NSMutableArray new];

        // call sprite1 to sprite4 from spritesheet //
        for(int i=1; i<=4; s++)      
        {
            [spriteAnimArray addObject:[[CCSpriteFrameCache sharedSpriteFrameCache]
                                                spriteFrameByName:[NSString stringWithFormat:@"sprite%d.png",i]]];
        }
       
        CCAnimation *animate = [CCAnimation animationWithFrames:spriteAnimArray delay:0.3f];
        CCRepeat *sprite_Action = [CCRepeatForever actionWithAction:
                                                    [CCAnimate actionWithAnimation:animate
                                                    restoreOriginalFrame:YES]];       

        [sprite_1 runAction:sprite_Action];
        [spriteAnimArray release];
    }