let c = this.node.getComponent(cc.Canvas);
c.fitHeight = true;
c.fitWidth = false;

let h = 960 * cc.winSize.height / cc.winSize.width;

c.designResolution = new cc.Size(960, h);
this.node.setContentSize(960, h);

// 适配解决方案        let _canvas = cc.Canvas.instance;// 设计分辨率比        let _rateR = _canvas.designResolution.height/_canvas.designResolution.width;// 显示分辨率比        let _rateV = cc.winSize.height/cc.winSize.width;        console.log("winSize: rateR: "+_rateR+" rateV: "+_rateV);        if (_rateV > _rateR)        {            _canvas.fitHeight = false;            _canvas.fitWidth = true;            console.log("winSize: fitWidth");        }        else        {            _canvas.fitHeight = true;            _canvas.fitWidth = false;            console.log("winSize: fitHeight");        }

三点注意事项：

1.主域和子域的设计分辨率和适配方案要相同

2.sharedCanvas 不要设置宽高

3.承载sharedCanvas 的sprite要根据实际分辨率动态调整