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                ## uni.connectSocket(OBJECT) **創建一個 WebSocket 連接。** **OBJECT 參數說明:** ![](https://box.kancloud.cn/35a6f4ca7d7e359fb5f75eaf86a4fbe0_866x321.png) **示例代碼:** ``` uni.connectSocket({ url: 'wss://www.example.com/socket', data: { x: '', y: '' }, header: { 'content-type': 'application/json' }, protocols: ['protocol1'], method: "GET" }); ``` ## uni.onSocketOpen(CALLBACK) 監聽WebSocket連接打開事件。 **callback 回調函數:** **參數** ![](https://box.kancloud.cn/56384b62ae3a0ef5f2f37fe9197d80d5_863x93.png) **示例代碼:** ``` uni.connectSocket({ url: 'wss://www.example.com/socket' }); uni.onSocketOpen(function (res) { console.log('WebSocket連接已打開!'); }); ``` ## uni.onSocketError(CALLBACK) 監聽WebSocket錯誤。 **示例代碼:** ``` uni.connectSocket({ url: 'wss://www.example.com/socket' }); uni.onSocketOpen(function (res) { console.log('WebSocket連接已打開!'); }); uni.onSocketError(function (res) { console.log('WebSocket連接打開失敗,請檢查!'); }); ``` ## uni.sendSocketMessage(OBJECT) 通過 WebSocket 連接發送數據,需要先 uni.connectSocket,并在 uni.onSocketOpen 回調之后才能發送。 **OBJECT 參數說明:** ![](https://box.kancloud.cn/68d59452d78744200d4522dc2df7a43e_858x205.png) **示例代碼:** ``` var socketOpen = false; var socketMsgQueue = []; uni.connectSocket({ url: 'wss://www.example.com/socket' }); uni.onSocketOpen(function (res) { socketOpen = true; for (var i = 0; i < socketMsgQueue.length; i++) { sendSocketMessage(socketMsgQueue[i]); } socketMsgQueue = []; }); function sendSocketMessage(msg) { if (socketOpen) { uni.sendSocketMessage({ data: msg }); } else { socketMsgQueue.push(msg); } } ``` ## ## uni.onSocketMessage(CALLBACK) 監聽WebSocket接受到服務器的消息事件。 **CALLBACK 返回參數:** ![](https://box.kancloud.cn/221e3116a0c00af4d92c526ee0f2717a_862x90.png) 示例代碼: ``` uni.connectSocket({ url: 'wss://www.example.com/socket' }); uni.onSocketMessage(function (res) { console.log('收到服務器內容:' + res.data); }); ``` **uni.closeSocket(OBJECT)** **關閉 WebSocket 連接**。 ![](https://box.kancloud.cn/30080822916fc7a43bc4c44ea3cddf89_868x314.png) ## uni.onSocketClose(CALLBACK) **監聽WebSocket關閉。** ``` uni.connectSocket({ url: 'wss://www.example.com/socket' }); // 注意這里有時序問題, // 如果 uni.connectSocket 還沒回調 uni.onSocketOpen,而先調用 uni.closeSocket,那么就做不到關閉 WebSocket 的目的。 // 必須在 WebSocket 打開期間調用 uni.closeSocket 才能關閉。 uni.onSocketOpen(function () { uni.closeSocket(); }); uni.onSocketClose(function (res) { console.log('WebSocket 已關閉!'); }); ``` **返回值:** 返回一個 SocketTask。
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