Import pauseBtnOFF.png and pauseBtnON.png into the project directory for this section.

In the newly renamed GameplayScene.m file, we will add the following code at the end of the init function:

//pause button
    CCButton *pauseBtn = [CCButton buttonWithTitle:nil
      spriteFrame:[CCSpriteFrame frameWithImageNamed:@"pauseBtnOFF.png"]
      highlightedSpriteFrame:[CCSpriteFrame frameWithImageNamed:@"pauseBtnON.png"]
      disabledSpriteFrame:nil];


    [pauseBtn setTarget:self selector:@selector(pauseBtnPressed:)];

    pauseBtn.togglesSelectedState = YES;


    CCLayoutBox * btnMenu;
    btnMenu = [[CCLayoutBox alloc] init];
    btnMenu.anchorPoint = ccp(0.5f, 0.5f);
    btnMenu.position = CGPointMake(winSize.width - pauseBtn.contentSize.width/2,
    winSize.height - pauseBtn.contentSize.height/2);

    btnMenu.direction = CCLayoutBoxDirectionVertical;
    btnMenu.spacing = 10.0f;


    [btnMenu addChild:pauseBtn];

    [self addChild:btnMenu];

  }

  return  self;
}

We will create a button called pauseBtn and assign pauseBtnON and pauseBtnOFF for the normal and highlighted state of the button.

The pauseBtnPressed variable in the button function is where we will add the logic for the button later.

The button's selected state will be set to toggle.

The button will be added to CCLayoutBox and placed in the upper-right part of the screen. Then, btnMenu will be added to the scene.

Next, we will add the pauseBtnPressed function, as follows:

-(void)pauseBtnPressed:(id)sender{

  CCButton *pauseBtn = (CCButton*)sender;

if(pauseBtn.state == CCControlStateHighlighted){

self.paused = false;

  }else{

    self.paused = true;

  }
}

We will first typecast the sender to the CCButton type and store it as a variable named pauseBtn.

We will then take a look at the state of the button. If the state is highlighted, we will resume the game by setting the pause property of the current class to false. Alternatively, we can set the property to true to pause the game.

Run the game and press the pause button in the upper-right part of the screen to pause the game. Press it once again to resume.