---
title: reloadData()
framework: quicklook
role: symbol
role_heading: Instance Method
path: quicklook/qlpreviewcontroller/reloaddata()
---

# reloadData()

Asks the preview controller to reload its data from its data source.

## Declaration

```swift
func reloadData()
```

## Discussion

Discussion Quick Look recomputes the displayed data only if the current preview item changes.

## See Also

### Managing item previews

- [canPreview(_:)](quicklook/qlpreviewcontroller/canpreview(_:).md)
- [currentPreviewItem](quicklook/qlpreviewcontroller/currentpreviewitem.md)
- [currentPreviewItemIndex](quicklook/qlpreviewcontroller/currentpreviewitemindex.md)
- [refreshCurrentPreviewItem()](quicklook/qlpreviewcontroller/refreshcurrentpreviewitem().md)