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# init(objects:forKeys:)

Initializes a newly allocated dictionary with key-value pairs constructed from the provided arrays of keys and objects.

```
convenience init(objects: [Any], forKeys keys: [any NSCopying])
```

## Parameters

`objects`

An array containing the values for the new dictionary.

`keys`

An array containing the keys for the new dictionary. Each key is copied (using [`copy(with:)`](/documentation/Foundation/NSCopying/copy(with:)); keys must conform to the `NSCopying` protocol), and the copy is added to the new dictionary.

## Discussion

This method steps through the `objects` and `keys` arrays, creating entries in the new dictionary as it goes. An `NSInvalidArgumentException` is raised if the objects and keys arrays do not have the same number of elements.

## See Also

[`-  initWithObjectsAndKeys:`](/documentation/Foundation/NSDictionary/initWithObjectsAndKeys:)

Initializes a newly allocated dictionary with entries constructed from the specified set of values and keys.

[`+  dictionaryWithObjects:forKeys:`](/documentation/Foundation/NSDictionary/dictionaryWithObjects:forKeys:)

Creates a dictionary containing entries constructed from the contents of an array of keys and an array of values.


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