# `TabBarControlDelegate desiredWidthForVerticalTabBar:`

*Instance Method*

## Declaration

```swift
optional func desiredWidth(forVerticalTabBar tabBarControl: GSTabBarControl) -> CGFloat
```

```objc
- (CGFloat) desiredWidthForVerticalTabBar:(GSTabBarControl *) tabBarControl;
```

```python
desiredWidthForVerticalTabBar_(tabBarControl: GSTabBarControl) -> float
```