scaleAspectFillCrop和allowCrop都为true时，预览页面不允许左右滑动切换图片

TZImagePickerController/TZImagePickerController/TZPhotoPreviewController.m

@@ -207,6 +207,11 @@
     [_collectionView registerClass:[TZPhotoPreviewCell class] forCellWithReuseIdentifier:@"TZPhotoPreviewCell"];
     [_collectionView registerClass:[TZVideoPreviewCell class] forCellWithReuseIdentifier:@"TZVideoPreviewCell"];
     [_collectionView registerClass:[TZGifPreviewCell class] forCellWithReuseIdentifier:@"TZGifPreviewCell"];
+    
+    TZImagePickerController *_tzImagePickerVc = (TZImagePickerController *)self.navigationController;
+    if (_tzImagePickerVc.scaleAspectFillCrop && _tzImagePickerVc.allowCrop) {
+        _collectionView.scrollEnabled = NO;
+    }
 }
 
 - (void)configCropView {