小编You*_*thm的帖子

 void getPositions() {
  final RenderBox renderBox = scheduleForDayKey.currentContext!.findRenderObject();
  final position = renderBox.localToGlobal(Offset.zero);
  print("POSITION of Red: $position ");
}

这部分用红色下划线：

scheduleForDayKey.currentContext!.findRenderObject()

当我悬停时，它告诉我错误：

“RenderObject”类型的值不能分配给“RenderBox”类型的变量。

可能这段代码已经过时了，或者是因为我在互联网上看到了很多类似的代码示例，但由于某种原因对我不起作用。

I'm working on an audiobook listening app. There I have my main page, which consists of 3 page widgets linked through a Page View that I can swipe to navigate through these pages. On each page I have laid exactly one banner ad from google_mobile_ads package. The problem is that if I add those 3 banners, my app starts to lag a lot, I did check the release version of my app, it is still laggy. In order to understand …