why cannot call function in button?

[sinanqd10]

var diff,

    increase_end_angle = 0,

    start_angle = 1.5 * Math.PI,end_angle = 2 * Math.PI,

    startTime = (new Date()).getTime(),

circleTimer;

create: function {

    button =  this.game.add.button(0,0,'btnNext', this.start,this);

},

circleTimer: function () {

            var graphics = game.add.graphics(0, 0);         

            diff = (new Date()).getTime() - startTime;

            diff = diff / 60000; //60000ms = 60s            

            increase_end_angle = start_angle + end_angle * diff + reduce;                     

            graphics = game.add.bitmapData(80,80);

            graphics.context.fillStyle = '#D24545';

            graphics.context.beginPath();             

            graphics.context.arc(x,y,radius,start_angle,increase_end_angle,false);

            graphics.context.lineTo(x,y);

            graphics.context.fill();       

            graphics.context.closePath();

            game.add.image(13, 8, graphics);

},

start: function () {

    circleTimer = setInterval(this.circleTimer, 200);

},

update: function() {

   if(diff > 1 ) {

        clearInterval(circleTimer);

   }

},

[Abderrahmane TJ]

Because the `this` used inside create will be used py the phaser object, and thus will not be referring to your literal object.

 

This is all just guess work since you did not show us all your code.