<!--
{
  "availability" : [
    "iOS: 27.0.0 -",
    "iPadOS: 27.0.0 -",
    "macCatalyst: 27.0.0 -",
    "visionOS: 27.0.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "UIKit",
  "identifier" : "/documentation/UIKit/UITabBarController/Sidebar-swift.class/Delegate-swift.protocol/tabBarController(_:sidebarAvailabilityDidChange:)",
  "metadataVersion" : "0.1.0",
  "role" : "Instance Method",
  "symbol" : {
    "kind" : "Instance Method",
    "modules" : [
      "UIKit"
    ],
    "preciseIdentifier" : "c:objc(pl)UITabBarControllerSidebarDelegate(im)tabBarController:sidebarAvailabilityDidChange:"
  },
  "title" : "tabBarController(_:sidebarAvailabilityDidChange:)"
}
-->

# tabBarController(_:sidebarAvailabilityDidChange:)

Notifies the delegate when `UITabBarController.Sidebar.isAvailable` changes.

```
optional func tabBarController(_ tabBarController: UITabBarController, sidebarAvailabilityDidChange sidebar: UITabBarController.Sidebar)
```

---

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