this.runtime.createCustomAd({

            adUnitId:this.cusId,

            adIntervals: this.refreshDuration,

            style: {

                left: this.adLeft,

                top: this.systemInfo.screenHeight - 130

                fixed: true,

            }

        });

设置显示在左下角 但是有的手机会显示在左上角

如图