先在开放域中

let opid = this._openId;
wx.modifyFriendInteractiveStorage({
    key: '1',
    opNum: 1,
    operation: 'add',
    toUser: opid,

    success:res=>{
        console.log("modifyFriendInteractiveStorage---success",res);
    },
    fail:res=>{
        console.log("fail----res:",res);
    }
});

显示成功，然后在主域调用

wx.getUserInteractiveStorage({
    keyList: ["1"],
    success:res=>{
        console.log("getUserInteractiveStorage--success:",res);
    },
    fail:res=>{
        console.log("getUserInteractiveStorage--fail:",res);
    }
})

提示出错

errMsg: "getUserInteractiveStorage:fail 系统错误，错误码：-1,system apperror"