真机调试，iOS14.6，微信版本8.0.7，SDK版本2.18.0

使用canUseTcp测试API返回false：

wx.canIUse("createTCPSocket")

按照文档使用API：

const tcp = wx.createTCPSocket()
tcp.connect({address: '192.168.42.1', port: 7878})

直接报错：

VM13:2 SystemError (appServiceSDKScriptError)
this hasn't been initialised - super() hasn't been called
ReferenceError: this hasn't been initialised - super() hasn't been called
    at r (eval at n.call.document (http://127.0.0.1:12555/remote-debug/runtime.js?devtools_ignore=true:1:14643), <anonymous>:2:1277)
    at o (eval at n.call.document (http://127.0.0.1:12555/remote-debug/runtime.js?devtools_ignore=true:1:14643), <anonymous>:2:6955)
    at new n (eval at n.call.document (http://127.0.0.1:12555/remote-debug/runtime.js?devtools_ignore=true:1:14643), <anonymous>:2:2232971)
    at Object.FS (eval at n.call.document (http://127.0.0.1:12555/remote-debug/runtime.js?devtools_ignore=true:1:14643), <anonymous>:2:2234061)
    at Object.T.l.forEach.t.<computed> (eval at n.call.document (http://127.0.0.1:12555/remote-debug/runtime.js?devtools_ignore=true:1:14643), <anonymous>:2:1167452)
    at Object.eval (eval at n.call.document (http://127.0.0.1:12555/remote-debug/runtime.js?devtools_ignore=true:1:14643), <anonymous>:2:786902)
    at Object.eval (eval at n.call.document (http://127.0.0.1:12555/remote-debug/runtime.js?devtools_ignore=true:1:14643), <anonymous>:2:2397414)
    at < at wx.createTCPSocket>
    at Object.eval (eval at n.call.document (http://127.0.0.1:12555/remote-debug/runtime.js?devtools_ignore=true:1:14643), <anonymous>:2:115620)
    at qi.onTapConnectButton (weapp:///pages/home/index.js:13:18)
errorReport @ VM13:2
eval @ VM13:2
c @ VM13:2
eval @ VM13:2
onTapConnectButton @ index.js:8
i.safeCallback @ VM13:2
eval @ VM13:2
Dn @ VM13:2
eval @ VM13:2
y @ VM13:2
eval @ VM13:2
eval @ VM13:2
S @ VM13:2
Ce @ runtime.js?devtools_ignore=true:1
eval @ VM56:1
te @ runtime.js?devtools_ignore=true:1
je @ runtime.js?devtools_ignore=true:1
Be.Je.onmessage @ runtime.js?devtools_ignore=true:1
VM13:2 MiniProgramError
Cannot read property 'connect' of undefined
TypeError: Cannot read property 'connect' of undefined
    at qi.onTapConnectButton (weapp:///pages/home/index.js:14:9)
    at Object.i.safeCallback (eval at n.call.document (http://127.0.0.1:12555/remote-debug/runtime.js?devtools_ignore=true:1:14643), <anonymous>:2:2431454)
    at eval (eval at n.call.document (http://127.0.0.1:12555/remote-debug/runtime.js?devtools_ignore=true:1:14643), <anonymous>:2:2613138)
    at Dn (eval at n.call.document (http://127.0.0.1:12555/remote-debug/runtime.js?devtools_ignore=true:1:14643), <anonymous>:2:2559544)
    at eval (eval at n.call.document (http://127.0.0.1:12555/remote-debug/runtime.js?devtools_ignore=true:1:14643), <anonymous>:2:2613066)
    at y (eval at n.call.document (http://127.0.0.1:12555/remote-debug/runtime.js?devtools_ignore=true:1:14643), <anonymous>:2:2510002)
    at eval (eval at n.call.document (http://127.0.0.1:12555/remote-debug/runtime.js?devtools_ignore=true:1:14643), <anonymous>:2:2510346)
    at eval (eval at n.call.document (http://127.0.0.1:12555/remote-debug/runtime.js?devtools_ignore=true:1:14643), <anonymous>:2:1195510)
    at Object.S (eval at n.call.document (http://127.0.0.1:12555/remote-debug/runtime.js?devtools_ignore=true:1:14643), <anonymous>:2:79201)
    at Ce (http://127.0.0.1:12555/remote-debug/runtime.js?devtools_ignore=true:1:21747)
errorReport @ VM13:2
thirdErrorReport @ VM13:2
eval @ VM13:2
eval @ VM13:2
i.safeCallback @ VM13:2
i.call @ VM13:2
o @ VM13:2
i.safeCallback @ VM13:2
eval @ VM13:2
Dn @ VM13:2
eval @ VM13:2
y @ VM13:2
eval @ VM13:2
eval @ VM13:2
S @ VM13:2
Ce @ runtime.js?devtools_ignore=true:1
eval @ VM56:1
te @ runtime.js?devtools_ignore=true:1
je @ runtime.js?devtools_ignore=true:1
Be.Je.onmessage @ runtime.js?devtools_ignore=true:1

是我哪里搞错了吗？