修复allowPreview为No时，GIF可以被重复选中的问题

Author: banchichen

TZImagePickerController/TZImagePickerController/TZPhotoPickerController.m

@@ -574,11 +574,17 @@ - (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cell
         } else {
             // 2. select:check if over the maxImagesCount / 选择照片,检查是否超过了最大个数的限制
             if (tzImagePickerVc.selectedModels.count < tzImagePickerVc.maxImagesCount) {
-                if (tzImagePickerVc.maxImagesCount == 1 && !tzImagePickerVc.allowPreview) {
-                    model.isSelected = YES;
-                    [tzImagePickerVc addSelectedModel:model];
-                    [strongSelf doneButtonClick];
-                    return;
+                if (!tzImagePickerVc.allowPreview) {
+                    BOOL shouldDone = tzImagePickerVc.maxImagesCount == 1;
+                    if (!tzImagePickerVc.allowPickingMultipleVideo && (model.type == TZAssetModelMediaTypeVideo || model.type == TZAssetModelMediaTypePhotoGif)) {
+                        shouldDone = YES;
+                    }
+                    if (shouldDone) {
+                        model.isSelected = YES;
+                        [tzImagePickerVc addSelectedModel:model];
+                        [strongSelf doneButtonClick];
+                        return;
+                    }
                 }
                 strongCell.selectPhotoButton.selected = YES;
                 model.isSelected = YES;

TZImagePickerController/ViewController.m

@@ -342,7 +342,7 @@ - (void)pushTZImagePickerController {
      cropView.layer.borderWidth = 2.0;
      }];*/
 
-    //imagePickerVc.allowPreview = NO;
+    // imagePickerVc.allowPreview = NO;
     // 自定义导航栏上的返回按钮
     /*
     [imagePickerVc setNavLeftBarButtonSettingBlock:^(UIButton *leftButton){