解决dark mode下页面跳转白屏的问题

TZImagePickerController/TZImagePickerController/TZImagePickerController.m

@@ -51,7 +51,11 @@
 - (void)viewDidLoad {
     [super viewDidLoad];
     self.needShowStatusBar = ![UIApplication sharedApplication].statusBarHidden;
+    if (@available(iOS 13.0, *)) {
+        self.view.backgroundColor = UIColor.tertiarySystemBackgroundColor;
+    } else {
         self.view.backgroundColor = [UIColor whiteColor];
+    }
     self.navigationBar.barStyle = UIBarStyleBlack;
     self.navigationBar.translucent = YES;
     [TZImageManager manager].shouldFixOrientation = NO;
@@ -724,7 +728,11 @@
     [super viewDidLoad];
     [[PHPhotoLibrary sharedPhotoLibrary] registerChangeObserver:self];
     self.isFirstAppear = YES;
+    if (@available(iOS 13.0, *)) {
+        self.view.backgroundColor = UIColor.tertiarySystemBackgroundColor;
+    } else {
         self.view.backgroundColor = [UIColor whiteColor];
+    }
     
     TZImagePickerController *imagePickerVc = (TZImagePickerController *)self.navigationController;
     UIBarButtonItem *cancelItem = [[UIBarButtonItem alloc] initWithTitle:imagePickerVc.cancelBtnTitleStr style:UIBarButtonItemStylePlain target:imagePickerVc action:@selector(cancelButtonClick)];

TZImagePickerController/TZImagePickerController/TZPhotoPickerController.m

@@ -82,7 +82,11 @@ static CGFloat itemMargin = 5;
     TZImagePickerController *tzImagePickerVc = (TZImagePickerController *)self.navigationController;
     _isSelectOriginalPhoto = tzImagePickerVc.isSelectOriginalPhoto;
     _shouldScrollToBottom = YES;
+    if (@available(iOS 13.0, *)) {
+        self.view.backgroundColor = UIColor.tertiarySystemBackgroundColor;
+    } else {
         self.view.backgroundColor = [UIColor whiteColor];
+    }
     self.navigationItem.title = _model.name;
     UIBarButtonItem *cancelItem = [[UIBarButtonItem alloc] initWithTitle:tzImagePickerVc.cancelBtnTitleStr style:UIBarButtonItemStylePlain target:tzImagePickerVc action:@selector(cancelButtonClick)];
     [TZCommonTools configBarButtonItem:cancelItem tzImagePickerVc:tzImagePickerVc];