153 lines
9.9 KiB
HTML
153 lines
9.9 KiB
HTML
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<title>Storages | Auto.js 3.0.0 文档</title>
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<a href="index.html" name="toc">索引</a> |
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<div id="toc">
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<h2>目录</h2>
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<ul>
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<li><span class="stability_2"><a href="#storages_storages">Storages</a></span><ul>
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<li><span class="stability_undefined"><a href="#storages_storages_create_name">storages.create(name)</a></span></li>
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<li><span class="stability_undefined"><a href="#storages_storages_remove_name">storages.remove(name)</a></span></li>
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</ul>
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</li>
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<li><span class="stability_undefined"><a href="#storages_storages_1">Storages</a></span><ul>
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<li><span class="stability_undefined"><a href="#storages_storage_get_key_defaultvalue">Storage.get(key[, defaultValue])</a></span></li>
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<li><span class="stability_undefined"><a href="#storages_storage_put_key_value">Storage.put(key, value)</a></span></li>
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<li><span class="stability_undefined"><a href="#storages_storage_remove_key">Storage.remove(key)</a></span></li>
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<li><span class="stability_undefined"><a href="#storages_storage_contains_key">Storage.contains(key)</a></span></li>
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<li><span class="stability_undefined"><a href="#storages_storage_clear">Storage.clear()</a></span></li>
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</ul>
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</li>
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</ul>
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</div>
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<div id="apicontent">
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<h1>Storages<span><a class="mark" href="#storages_storages" id="storages_storages">#</a></span></h1>
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<div class="api_stability api_stability_2"><a href="documentation.html#documentation_stability_index">Stability: 2</a> - Stable</div><p>storages模块提供了保存简单数据、用户配置等的支持。保存的数据除非应用被卸载或者被主动删除，否则会一直保留。</p>
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<p>storages支持<code>number</code>, <code>boolean</code>, <code>string</code>等数据类型以及把<code>Object</code>, <code>Array</code>用<code>JSON.stringify</code>序列化存取。</p>
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<p>storages保存的数据在脚本之间是共享的，任何脚本只要知道storage名称便可以获取到相应的数据，因此它不能用于敏感数据的储存。
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storages无法像Web开发中LocalStorage一样提供根据域名独立的存储，因为脚本的路径随时可能改变。</p>
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<h2>storages.create(name)<span><a class="mark" href="#storages_storages_create_name" id="storages_storages_create_name">#</a></span></h2>
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<div class="signature"><ul>
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<li><code>name</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type"><string></a> 本地存储名称</li>
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</ul>
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</div><p>创建一个本地存储并返回一个<code>Storage</code>对象。不同名称的本地存储的数据是隔开的，而相同名称的本地存储的数据是共享的。</p>
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<p>例如在一个脚本中，创建名称为ABC的存储并存入a=123:</p>
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<pre><code>var storage = stroages.create("ABC");
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storage.put("a", 123);
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</code></pre><p>而在另一个脚本中是可以获取到ABC以及a的值的：</p>
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<pre><code>var storage = storages.create("ABC");
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log("a = " + storage.get("a"));
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</code></pre><p>因此，本地存储的名称比较重要，尽量使用含有域名、作者邮箱等唯一信息的名称来避免冲突，例如：</p>
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<pre><code>var storage = storages.create("2732014414@qq.com:ABC");
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</code></pre><h2>storages.remove(name)<span><a class="mark" href="#storages_storages_remove_name" id="storages_storages_remove_name">#</a></span></h2>
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<div class="signature"><ul>
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<li><code>name</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type"><string></a> 本地存储名称</li>
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</ul>
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</div><p>删除一个本地存储以及他的全部数据。如果该存储不存在，返回false；否则返回true。</p>
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<h1>Storages<span><a class="mark" href="#storages_storages_1" id="storages_storages_1">#</a></span></h1>
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<h2>Storage.get(key[, defaultValue])<span><a class="mark" href="#storages_storage_get_key_defaultvalue" id="storages_storage_get_key_defaultvalue">#</a></span></h2>
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<div class="signature"><ul>
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<li><code>key</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type"><string></a> 键值</li>
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<li><code>defaultValue</code> <span class="type"><any></span> 可选，默认值</li>
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</ul>
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</div><p>从本地存储中取出键值为key的数据并返回。</p>
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<p>如果该存储中不包含该数据，这时若指定了默认值参数则返回默认值，否则返回undefined。</p>
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<p>返回的数据可能是任意数据类型，这取决于使用<code>Storage.put</code>保存该键值的数据时的数据类型。</p>
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<h2>Storage.put(key, value)<span><a class="mark" href="#storages_storage_put_key_value" id="storages_storage_put_key_value">#</a></span></h2>
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<div class="signature"><ul>
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<li><code>key</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type"><string></a> 键值</li>
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<li><code>value</code> <span class="type"><any></span> 值</li>
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</ul>
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</div><p>把值value保存到本地存储中。value可以是undefined以外的任意数据类型。如果value为undefined则抛出TypeError。</p>
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<p>存储的过程实际上是使用JSON.stringify把value转换为字符串再保存，因此value必须是可JSON化的才能被接受。</p>
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<h2>Storage.remove(key)<span><a class="mark" href="#storages_storage_remove_key" id="storages_storage_remove_key">#</a></span></h2>
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<div class="signature"><ul>
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<li><code>key</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type"><string></a> 键值</li>
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</ul>
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</div><p>移除键值为key的数据。不返回任何值。</p>
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<h2>Storage.contains(key)<span><a class="mark" href="#storages_storage_contains_key" id="storages_storage_contains_key">#</a></span></h2>
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<div class="signature"><ul>
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<li><code>key</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type"><string></a> 键值</li>
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</ul>
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</div><p>返回该本地存储是否包含键值为key的数据。是则返回true，否则返回false。</p>
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<h2>Storage.clear()<span><a class="mark" href="#storages_storage_clear" id="storages_storage_clear">#</a></span></h2>
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<p>移除该本地存储的所有数据。不返回任何值。</p>
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</div>
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</div>
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