调用完这个方法之后，横屏是切换了，但是UI适配很奇葩

wx['setDeviceOrientation']({
    value: dir === "V" ? "portrait" : "landscape",
    success: (res) => {
        console.log("setDeviceOrientation", res);
    },
    fail: (err) => {
        console.log("setDeviceOrientation fail", err);
        this.is_rotate_v2 = false;
    }
});