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我試圖將消息發送給nodejs上的特定用戶,然後將socket.id
和nickname
作爲用戶名保存到數組中,然後獲取該消息,但出現此錯誤:Nodejs無法讀取未定義錯誤的屬性'emit'
Cannot read property 'emit' of undefined
這是我的代碼:
var socket = require('socket.io'),
express = require('express'),
app = express(),
server = require('http').createServer(app),
io = socket.listen(server);
io.sockets.on('connection', function (socket) {
socket.on('login', function (data) {
login(data.username, data.password, function (success, value) {
if (success) {
usernames[data.username] = socket.id;
socket.emit('login', {result: true, id: value});
} else {
socket.emit('login', {result: false});
}
});
});
socket.on('requestMoney', function (username) {
log.info('username: ' + username);
usernames[username].emit('message', {username: 'Hey !!'});
});
});
http://stackoverflow.com/questions/32659864/socket-io-typeerror-cannot-read-property-emit-of-undefined –
'usernames [username]'顯然不是你的事情,相反,它可能會返回'undefined',可能是因爲在回調參數中接收到的鍵是錯誤的。 – adeneo
用戶名不是空的先生 –