---
title: "init(containerClassDescription:containerSpecifier:key:index:)"
framework: foundation
role: symbol
role_heading: Initializer
path: "foundation/nsindexspecifier/init(containerclassdescription:containerspecifier:key:index:)"
---

# init(containerClassDescription:containerSpecifier:key:index:)

Initializes an allocated NSIndexSpecifier object with a class description, container specifier, collection key, and object index.

## Declaration

```swift
init(containerClassDescription classDesc: NSScriptClassDescription, containerSpecifier container: NSScriptObjectSpecifier?, key property: String, index: Int)
```

## Parameters

- `classDesc`: Description for the container of the collection.
- `container`: Container of the collection.
- `property`: Name of the collection.
- `index`: The object within the key collection the index specifier is to identify.

## Return Value

Return Value Initialized NSIndexSpecifier object with its index property set to objectIndex.

## Discussion

Discussion Invokes the super class’s init(containerClassDescription:containerSpecifier:key:) method and sets the index property of the index specifier to objectIndex.

## See Also

### Related Documentation

- [Cocoa Scripting Guide](apple-archive/documentation/Cocoa/Conceptual/ScriptableCocoaApplications/SApps_intro/SAppsIntro.html.md)