如何修复'dart中的另一个异常被抛出：NoSuchMethodError：null上无效的成员：'findRenderObject'，带有针对Web的Flutter？

Question

热重新加载Web应用程序时，出现此错误。

这是filename = "images/file_%d.jpg"%d cv2.imwrite(filename, frame) d+=1 的输出：

flutter doctor -v

Answer 1

这似乎是一个 known issue for Flutter web。如 this thread 中所述，该错误已修复。

<块引用>

所有列出的问题都已修复。结束。

• Another exception was thrown: NoSuchMethodError: invalid member on null: 'findRenderObject' #41284 -> DDC issue
• Text editing broken in firefox in non-release builds #43450 -> DDC issue
• [[网络]Chrome][mobile] text editing state is transfered between fields #42769 -> Chrome bug