IOS环境getStorage获取不到值

uni.getStorage({
key: 'userInfo',
success: function (res) {
_this.checkAccountToken(res.data.token)
_this.login(res.data.nickName);
},
fail: function(e) {
console.log(e);
}
});
提示信息
16:35:53.905 [Object] {"errMsg":"getStorage:fail data not found"} at App.vue:18