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我想遞增我的i值以將不同的值保存到本地存儲。但我總是= 0,我能做些什麼來改變這種行爲?函數中的遞增值
(function() {
var i = 0;
var storage = new Storage();
window.onload = function() {
document.getElementById('buttonCreate').onclick = function() {
var topicValue = document.getElementById("create-topic").value;
var statusValue = document.getElementById("create-status").value;
var descriptionValue = document.getElementById("create-description").value;
var ticket = {
topic: topicValue,
status: statusValue,
description: descriptionValue
};
storage.set("task-"+i, ticket);
i++;
}
}
})();
function Storage() {
this._ITEMS_DESCRIPTOR = 'items';
}
Storage.prototype.get = function() {
var fromStorage = localStorage.getItem(this._ITEMS_DESCRIPTOR);
return fromStorage ? JSON.parse(fromStorage) : [];
};
Storage.prototype.set = function(key, items) {
localStorage.setItem(key, JSON.stringify(items));
};
在將'i'設置爲'0'之後立即調用'storage.set',並且在這之間永不增加值。除了每次將其聲明爲「0」以外,如果它存在,則將其設置爲存儲器中項目的值。另外一定要增加,然後調用'storage.set'。 –
我已經評論過您的[上一個問題](http://stackoverflow.com/questions/38279021/incrementing-key-value-to-save-data-in-localstorage),您沒有獲取先前存儲的值。 – Rajesh
我如何獲取以前存儲的值? –