iphoneX适配方式:

    if(cc.sys.isNative && cc.sys.platform == cc.sys.IPHONE){
        var size = cc.view.getFrameSize();
        var isIphoneX = (size.width == 2436 && size.height == 1125) 
               ||(size.width == 1125 && size.height == 2436);
        if(isIphoneX){
            var cvs = this.node.getComponent(cc.Canvas);
            cvs.fitHeight = true;
            cvs.fitWidth = true;
        }
     }

creator适配做的很好，以高，以宽作为适配，还是cocos2d-x以前那套，熟悉的味道。

iPad适配

        let isNotFit = cc.winSize.width / cc.winSize.height <= 1.65;
        let canvas = this.node.getComponent(cc.Canvas);
        if (isNotFit) {
            canvas.fitHeight = true;
            canvas.fitWidth = true;
        }