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# getObjectValue(_:for:errorDescription:)

This method is not supported for the `NSMassFormatter` class.

```
func getObjectValue(_ obj: AutoreleasingUnsafeMutablePointer<AnyObject?>?, for string: String, errorDescription error: AutoreleasingUnsafeMutablePointer<NSString?>?) -> Bool
```

## Parameters

`obj`

An output parameter. If overridden, this parameter should contain the object created from the provided string.

`string`

A string representation of the object.

`error`

An output parameter. If overridden, this parameter should contain a description of any errors that occur. If you do not want to receive error messages, set this parameter to `NULL`.

## Return Value

<doc://com.apple.documentation/documentation/Swift/true> if the conversion from string was successful; otherwise, <doc://com.apple.documentation/documentation/Swift/false>.

## Discussion

You can override this method in a subclass. For more information, see [`Formatter`](/documentation/Foundation/Formatter).

## See Also

[`getObjectValue(_:for:errorDescription:)`](/documentation/Foundation/Formatter/getObjectValue(_:for:errorDescription:))

The default implementation of this method raises an exception.


---

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