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  "title" : "Run Delegate Versions"
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# Run Delegate Versions

The version of the run delegate.

## Discussion

Set the version field of the [`CTRunDelegateCallbacks`](/documentation/CoreText/CTRunDelegateCallbacks) structure to `kCTRunDelegateCurrentVersion` when creating a CTRunDelegate object with a call to [`CTRunDelegateCreate(_:_:)`](/documentation/CoreText/CTRunDelegateCreate(_:_:)).

## Topics

### Constants

[`var kCTRunDelegateVersion1: Int`](/documentation/CoreText/kCTRunDelegateVersion1)

Version 1 of the run delegate.

[`var kCTRunDelegateCurrentVersion: Int`](/documentation/CoreText/kCTRunDelegateCurrentVersion)

The current version of the run delegate.


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