小程序技术未来发展的思考 - 实时协作
5天前
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<canvas canvas-id="whiteboard" bindtouchstart="ontouchstart" bindtouchmove="ontouchmove" bindtouchend="ontouchend">canvas>
const socket = wx.connectsocket({
url: 'wss://your-server-url',
});
let drawing = false;
let context = wx.createcanvascontext('whiteboard');
// 处理用户触摸事件,绘制内容
function ontouchstart(e) {
drawing = true;
context.beginpath();
context.moveto(e.touches[0].x, e.touches[0].y);
}
function ontouchmove(e) {
if (!drawing) return;
context.lineto(e.touches[0].x, e.touches[0].y);
context.stroke();
context.draw(true);
// 发送绘制数据到其他用户
socket.send({
data: json.stringify({
x: e.touches[0].x,
y: e.touches[0].y,
}),
});
}
function ontouchend(e) {
drawing = false;
context.closepath();
}
// 接收其他用户的绘制数据,并绘制到白板上
socket.onmessage((res) => {
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