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# UINavigationController.Operation

Constants that define the type of navigation controller transitions that can occur.

```
enum Operation
```

## Topics

### Constants

[`UINavigationControllerOperationNone`](/documentation/UIKit/UINavigationController/Operation/none)

A constant that indicates no operation is taking place.

[`UINavigationControllerOperationPush`](/documentation/UIKit/UINavigationController/Operation/push)

A constant that indicates a view controller is being pushed onto the navigation stack.

[`UINavigationControllerOperationPop`](/documentation/UIKit/UINavigationController/Operation/pop)

A constant that indicates the topmost view controller is being removed from the navigation stack.

## Relationships

### Conforms To

[`SendableMetatype`](/documentation/Swift/SendableMetatype)

[`Equatable`](/documentation/Swift/Equatable)

[`RawRepresentable`](/documentation/Swift/RawRepresentable)

[`BitwiseCopyable`](/documentation/Swift/BitwiseCopyable)

[`Hashable`](/documentation/Swift/Hashable)

[`Sendable`](/documentation/Swift/Sendable)

---

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