原因
客户端的socket被回收释放而导致较高概率接收不到client.on("message", (value: SocketInfo) 中的回调。
解决措施
定义一个数组，客户端连接时，将客户端的socket添加到数组中，防止被回收，确保能接收数据。代码如下：
import { socket } from '@kit.NetworkKit';
let tcpServer: socket.TCPSocketServer = socket.constructTCPSocketServerInstance();
// 定义存放客户端连接的数组
let tcpConnectArray: socket.TCPSocketConnection[] = [];
class SocketInfo {
message: ArrayBuffer = new ArrayBuffer(1);
remoteInfo: socket.SocketRemoteInfo = {} as socket.SocketRemoteInfo;
}
@Entry
@Component
struct CreateSocket {
build() {
Column() {
Button('创建socket').onClick(async () => {
tcpServer.on('connect', (client: socket.TCPSocketConnection) => {
// 保存客户端的socket
tcpConnectArray.push(client);
// Subscribe to events of the TCPSocketConnection object.
client.on('close', () => {
console.log("on close success");
});
client.on('message', (value: SocketInfo) => {
// 此处高概率收不到message
let buffer = value.message;
let dataView = new DataView(buffer);
let str = '';
for (let i = 0; i < dataView.byteLength; ++i) {
str += String.fromCharCode(dataView.getUint8(i));
}
console.log('received message--:' + str);
});
})
console.log('create socket Succeeded ');
})
}
.height('100%')
.width('100%')
.justifyContent(FlexAlign.Center)
}
}