---
title: "init(supportedTypes:validator:payloadAction:)"
framework: swiftui
role: symbol
role_heading: Initializer
path: "swiftui/pastebutton/init(supportedtypes:validator:payloadaction:)"
---

# init(supportedTypes:validator:payloadAction:)

Creates a Paste button that accepts specific types of data from the pasteboard, performing a custom validation of the data before sending it to your app.

## Declaration

```swift
nonisolated init<Payload>(supportedTypes: [String], validator: @escaping ([NSItemProvider]) -> Payload?, payloadAction: @escaping (Payload) -> Void)
```

## Parameters

- `supportedTypes`: The exact uniform type identifiers supported by the button. If the pasteboard doesn’t contain any of the supported types, the button becomes disabled.
- `validator`: A handler that receives those contents of the pasteboard that conform to payloadAction. Load and inspect these items to determine whether to validate the button. If you load a valid item, return it from this closure. If the pasteboard doesn’t contain any valid items, return nil to invalidate the button.
- `payloadAction`: The handler called when the user clicks the button. This closure receives the preprocessed result of validator.

## Discussion

Discussion Set the contents of supportedTypes in order of your app’s preference for its supported types. The Paste button takes the most-preferred type that the pasteboard source supports and delivers this to the validator closure.

## See Also

### Deprecated initializers

- [init(supportedTypes:payloadAction:)](swiftui/pastebutton/init(supportedtypes:payloadaction:).md)
- [init(supportedContentTypes:validator:payloadAction:)](swiftui/pastebutton/init(supportedcontenttypes:validator:payloadaction:).md)