[LayaAir 2.0]分享问题解决,关键词:canvas不在左上角,鼠标点击位置偏移怎么办

        initEvent(e, nativeEvent = null) {

            var _this = this;

            _this._event._stoped = false;

            _this._event.nativeEvent = nativeEvent || e;

            _this._target = null;

		    var docElem = document.documentElement

		    var win = document.defaultView

		    var clientBox = Browser._container.getBoundingClientRect()

		    this._point.setTo((e.pageX || e.clientX)-clientBox.x - win.pageXOffset - docElem.clientLeft,(e.pageY || e.clientY)-clientBox.y - win.pageYOffset - docElem.clientTop);

            // this._point.setTo(e.pageX || e.clientX, e.pageY || e.clientY);

            if (this._stage._canvasTransform) {

                this._stage._canvasTransform.invertTransformPoint(this._point);

                _this.mouseX = this._point.x;

                _this.mouseY = this._point.y;

            }

            _this._event.touchId = e.identifier || 0;

            this._tTouchID = _this._event.touchId;

            var evt;

            evt = TouchManager.I._event;

            evt._stoped = false;

            evt.nativeEvent = _this._event.nativeEvent;

            evt.touchId = _this._event.touchId;

        }