Thread 1: "Access to _UIBarBackground's _backgroundEffectView ivar is prohibited. This is an application bug"

[mrbluesky888]

Thread 1: "Access to _UIBarBackground's _backgroundEffectView ivar is prohibited. This is an application bug"

• (UIView *)jz_backgroundView {
  if (@available(iOS 10, *)) {
  return [self valueForKeyPath:@"_backgroundView._backgroundEffectView"];
  }
  return [self valueForKeyPath:@"_backgroundView"];
  }

[CCBrother]

我也遇到了。13以上需要适配

• (UIView *)jz_backgroundView {
  if (@available(iOS 13, *)) {
  return self.subviews.firstObject;
  }
  return [self valueForKeyPath:@"_backgroundView"];
  }