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# indexOfTabViewItem(withIdentifier:)

Returns the index of the item that matches the specified identifier or `NSNotFound` if the item is not found.

```
func indexOfTabViewItem(withIdentifier identifier: Any) -> Int
```

## Parameters

`identifier`

The identifier of a tab view item.

## Return Value

The zero-based index of the tab view item corresponding to `identifier`, or `NSNotFound` if the item is not found.

## Discussion

The returned index is zero-based.

## See Also

[`-  insertTabViewItem:atIndex:`](/documentation/AppKit/NSTabView/insertTabViewItem(_:at:))

Inserts the specified item into the tab view’s array of tab view items at the specified index.


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