提示弹窗销毁时导致监听被提前释放

[halfpreschooler]

• (void)dismissViewControllerAnimated:(BOOL)flag completion:(void (^)(void))completion
  {
  for (UIViewController *childVC in self.childViewControllers) {
  if ([childVC respondsToSelector:@selector(viewDidDealloc)]) {
  [childVC performSelector:@selector(viewDidDealloc)];
  }
  }
  [super dismissViewControllerAnimated:flag completion:completion];
  }

• (void)viewDidDealloc
  {
  LFImagePickerController *imagePickerVc = (LFImagePickerController *)self.navigationController;
  if (imagePickerVc.syncAlbum) {
  [[PHPhotoLibrary sharedPhotoLibrary] unregisterChangeObserver:self]; //移除监听者
  }
  [[NSNotificationCenter defaultCenter] removeObserver:self];
  }

• (void)dealloc
  {

}

[lincf0912]

有什么问题吗？ 发自我的iPhone

…

在 2021年4月20日，15:53，李浪 ***@***.***> 写道：  (void)dismissViewControllerAnimated:(BOOL)flag completion:(void (^)(void))completion { for (UIViewController *childVC in self.childViewControllers) { if ([childVC ***@***.***(viewDidDealloc)]) { [childVC ***@***.***(viewDidDealloc)]; } } [super dismissViewControllerAnimated:flag completion:completion]; } (void)viewDidDealloc { LFImagePickerController *imagePickerVc = (LFImagePickerController *)self.navigationController; if (imagePickerVc.syncAlbum) { [[PHPhotoLibrary sharedPhotoLibrary] unregisterChangeObserver:self]; //移除监听者 } [[NSNotificationCenter defaultCenter] removeObserver:self]; } (void)dealloc { } — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub, or unsubscribe.

[halfpreschooler]

再次拍摄后，列表就监听不到相册变化了呀，就显示不出来了呀，就虽然选中了，但是看不见。

[lincf0912]

不是很明白，触发LFImagePickerController的dismissViewControllerAnimated:completion: 意味着相册已经关闭了。怎么还有拍摄的？

…

2021年4月22日 上午11:33，李浪 ***@***.***> 写道： 再次拍摄后，列表就监听不到相册变化了呀，就显示不出来了呀，就虽然选中了，但是看不见。 — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#97 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ACNOL4TE3XFIEKOPT6K23FLTJ6KKPANCNFSM43HTLUDA>.

[halfpreschooler]

LFImagePickerController（UINavigationController）上弹出的 UIAlertController 在销毁时也触发了 LFImagePickerController 的 dismissViewControllerAnimated:completion哦，彩蛋不。而且 dismiss 只是代表暂时不显示，不代表销毁了呀。

[lincf0912]

久等了。暂时这样解决。

- (void)dismissViewControllerAnimated:(BOOL)flag completion:(void (^)(void))completion
{
    /**
     弹出的 UIAlertController 在销毁时也触发了 dismissViewControllerAnimated:completion
     防止弹出的Controller 调用 self.presentingViewController 来销毁，这里判断没有presentedViewController来解决。
     */
    if ([self presentedViewController] == nil) {
        for (UIViewController *childVC in self.childViewControllers) {
            if ([childVC respondsToSelector:@selector(viewDidDealloc)]) {
                [childVC performSelector:@selector(viewDidDealloc)];
            }
        }        
    }
    [super dismissViewControllerAnimated:flag completion:completion];
}