存储不返回字符串离子 [英] Storage not returning string ionic

问题描述

我已经实现了 Ionic的存储(不知道这是不是要存储的新东西)值).

I've implemented Storage for Ionic (don't know if it's something new to store values).

我已经创建了一个存储object的服务(它可以工作，因为我已经用console.logged()了)，但是当我想要get()时，当我使用undefined时它会返回我undefined键，即使get()方法中的console.log()显示了我想要的...

I've created a service that stores an object (it works, because I've console.logged() it), but when I want to get() it's returning me undefined when I use the same key, even when the console.log() from the get() method prints what I want...

getInfo(keystorage): string {
    var val = null;  
        this.storage.get(keystorage).then((profile) => {
            val = JSON.parse(profile);
            console.log(val["info"]); //returning what I want
            return val["info"];
        })
        .catch((err: any) => {
            return 'catchhhh';
        });
        return val;
    }

现在返回null，因为我已经添加了var vall = null，并且看起来它没有任何改变...

It's returning null now because I've added var vall = null and looks like it doesn't change anything...

我这样存储它:

saveInfo(usr){
    if(usr==null) return;
    var usertostore = {"id": currentUser["id"], "info":currentUser["info"]};
    this.storage.set("userLoged",JSON.stringify(usertostore ))
  }

我正在尝试获取如下信息:

I'm trying to get the info like this:

var userInfo = this.storageService.getInfo('myKey');

我想念什么?

推荐答案

之所以发生这种情况，是因为存储方法是异步的，并且在返回存储值时该值为null.

This happen because the storage method is asynchronous and the value is null when it is returned.

您可以尝试这种方式吗?

Can you try this way?

getInfo(keystorage) {
    return this.storage.get(keystorage);
}

saveInfo(usr){
    if(usr==null) return;
    var usertostore = {"id": 1234, "info":"fdsgf"};
    this.storage.set("userLoged",JSON.stringify(usertostore ))
}

并获取信息:

getInfo('userLoged').then((res) => {
  var userInfo = res;
});

这篇关于存储不返回字符串离子的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！