在javascript中使用JSON在localStorage中存储数组

Question

I have refereed this question and worked for me: so q1

Now Issue is that I have used JSON.stringify & JSON.parse to store array in localStorage. But when I run the code again and try to use JSON.parse on localStorage nothing get retrived. I dont know whats going wrong.

here is code:

    function BankProDisplay() {
        var myString = JSON.parse(localStorage['bankpro']);
        var mySplitResult = myString.split(",");
        for (i = 0; i < mySplitResult.length; i++) {
            document.getElementById('bankpro').innerHTML = document.getElementById('bankpro').innerHTML + mySplitResult[i] + "<br/>";
        }
    }

Answer 1

If you store an Array in LocalStorage using JSON.stringify, then you get it back using JSON.parse, return value is Array, not string. So when you are using function mySplitResult for myString (which is actually Array, thanks to JSON.parse), then it leads to an Error. So remove function mySplitResult and it should work fine.

Answer 2

var myString = JSON.parse(localStorage['bankpro']);

JSON.parse返回一个javascript对象，而不是一个字符串，它没有split方法。