之前canvas创建好好的然后模拟器正常运行，在我的手机上真机调试就报错。

手机微信版本： 8.0.42

手机基础库： 3.1.4

手机系统：IOS 17.1

VM13:2 SystemError (appServiceSDKScriptError)

Cannot read property 'createCanvas' of undefined

TypeError: Cannot read property 'createCanvas' of undefined

    at y1 (eval at Ce.t.call.document (http://127.0.0.1:34344/remote-debug/runtime.js?devtools_ignore=true:1:18937), <anonymous>:2:1567216)

    at new b1 (eval at Ce.t.call.document (http://127.0.0.1:34344/remote-debug/runtime.js?devtools_ignore=true:1:18937), <anonymous>:2:1567839)

    at b3 (eval at Ce.t.call.document (http://127.0.0.1:34344/remote-debug/runtime.js?devtools_ignore=true:1:18937), <anonymous>:2:1611032)

    at eval (eval at Ce.t.call.document (http://127.0.0.1:34344/remote-debug/runtime.js?devtools_ignore=true:1:18937), <anonymous>:2:1611918)

    at Generator.next (<anonymous>)

    at n (eval at Ce.t.call.document (http://127.0.0.1:34344/remote-debug/runtime.js?devtools_ignore=true:1:18937), <anonymous>:2:3597)

    at s (eval at Ce.t.call.document (http://127.0.0.1:34344/remote-debug/runtime.js?devtools_ignore=true:1:18937), <anonymous>:2:3800)

    at G (eval at Ce.t.call.document (http://127.0.0.1:34344/remote-debug/runtime.js?devtools_ignore=true:1:18937), <anonymous>:2:70958)

    at eval (eval at Ce.t.call.document (http://127.0.0.1:34344/remote-debug/runtime.js?devtools_ignore=true:1:18937), <anonymous>:2:72585)

    at I (eval at Ce.t.call.document (http://127.0.0.1:34344/remote-debug/runtime.js?devtools_ignore=true:1:18937), <anonymous>:2:40657)