---
title: imageUID()
framework: objectivec
role: symbol
role_heading: Instance Method
path: objectivec/nsobject-swift.class/imageuid()
---

# imageUID()

Returns a unique string that identifies the data source item.

## Declaration

```swift
func imageUID() -> String!
```

## Return Value

Return Value The string that identifies the data source item

## Discussion

Discussion Your data source must implement this method. The image browser view uses this identifier to associate the data source item and  its cache.