text: cc.Class({
  	extends: cc.Component,
  	properties: {
  
  	},
  	// use this for initialization
  	onLoad() {
  		this.init('http://forum.cocos.com/t/topic/44304/9');
  	},
  
  	init(url){
  		var ctx = this.node.addComponent(cc.Graphics);
  		if (typeof (url) !== 'string') {
  			console.log('url is not string',url);
  			return;
  		}
  		this.QRCreate(ctx, url);
  	},
  
  	QRCreate(ctx, url) {
  		var qrcode = new QRCode(-1, QRErrorCorrectLevel.H);
  		qrcode.addData(url);
  		qrcode.make();
  
  		ctx.fillColor = cc.Color.BLACK;
  		//块宽高
  		var tileW = this.node.width / qrcode.getModuleCount();
  		var tileH = this.node.height / qrcode.getModuleCount();
  
  		// draw in the Graphics
  		for (var row = 0; row < qrcode.getModuleCount(); row++) {
  			for (var col = 0; col < qrcode.getModuleCount(); col++) {
  				if (qrcode.isDark(row, col)) {
  					// ctx.fillColor = cc.Color.BLACK;
  					var w = (Math.ceil((col + 1) * tileW) - Math.floor(col * tileW));
  					var h = (Math.ceil((row + 1) * tileW) - Math.floor(row * tileW));
  					ctx.rect(Math.round(col * tileW), Math.round(row * tileH), w, h);
  					ctx.fill();
  				}
  			}
  		}
  	},
  
  });