修复点预览按钮进入的预览页取消选中再返回导致的序号异常bug

TZImagePickerController/TZImagePickerController/TZPhotoPickerController.m

@@ -343,7 +343,7 @@ static CGFloat itemMargin = 5;
 }
 - (void)previewButtonClick {
     TZPhotoPreviewController *photoPreviewVc = [[TZPhotoPreviewController alloc] init];
-    [self pushPhotoPrevireViewController:photoPreviewVc];
+    [self pushPhotoPrevireViewController:photoPreviewVc needCheckSelectedModels:YES];
 }
 
 - (void)originalPhotoButtonClick {
@@ -701,11 +701,18 @@ static CGFloat itemMargin = 5;
 }
 
 - (void)pushPhotoPrevireViewController:(TZPhotoPreviewController *)photoPreviewVc {
+    [self pushPhotoPrevireViewController:photoPreviewVc needCheckSelectedModels:NO];
+}
+
+- (void)pushPhotoPrevireViewController:(TZPhotoPreviewController *)photoPreviewVc needCheckSelectedModels:(BOOL)needCheckSelectedModels {
     __weak typeof(self) weakSelf = self;
     photoPreviewVc.isSelectOriginalPhoto = _isSelectOriginalPhoto;
     [photoPreviewVc setBackButtonClickBlock:^(BOOL isSelectOriginalPhoto) {
         __strong typeof(weakSelf) strongSelf = weakSelf;
         strongSelf.isSelectOriginalPhoto = isSelectOriginalPhoto;
+        if (needCheckSelectedModels) {
+            [strongSelf checkSelectedModels];
+        }
         [strongSelf.collectionView reloadData];
         [strongSelf refreshBottomToolBarStatus];
     }];