> For the complete documentation index, see [llms.txt](https://developers-apps-in-toss.toss.im/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developers-apps-in-toss.toss.im/documentation/api-and-sdk-en/common/screen/close.md).

# Close screen

***

### 1. Close the screen (`closeView`)

This function closes the current screen. You can use it when ending the service by pressing the "Close" button.

**Signature**

```typescript
function closeView(): Promise<void>;
```

**Example**

```tsx
import { Button } from 'react-native';
import { closeView } from '@granite-js/react-native';

function CloseButton() {
  return <Button title="Close" onPress={closeView} />;
}
```

***

### 2. Set up iOS swipe-back (`setIosSwipeGestureEnabled`)

Enables or disables the gesture to go back by swiping the screen on iOS.

**Signature**

```typescript
function setIosSwipeGestureEnabled(options: { isEnabled: boolean }): Promise<void>;
```

**Parameters**

* **options.isEnabled** · Required · `boolean`

  `true`If true, you can go back by swiping, `false`and if false, swipe-back is disabled.

**Example**

```tsx
import { setIosSwipeGestureEnabled } from '@apps-in-toss/framework';
import { Button } from 'react-native';

function Page() {
  return (
    <>
      <Button title="Turn swipe off" onPress={() => setIosSwipeGestureEnabled({ isEnabled: false })} />
      <Button title="Turn swipe on" onPress={() => setIosSwipeGestureEnabled({ isEnabled: true })} />
    </>
  );
}
```

***

### 3. Control back events (`useBackEvent`)

A Hook that lets you register and remove back events. You can handle back events only while a specific component is active.

**Signature**

```typescript
function useBackEvent(): BackEventControls;
```

**Return value**

* BackEventControls

  An object that controls back events. `addEventListener`to register the event, and `removeEventListener`to remove it.

{% hint style="info" %}
**Please note**

This Hook must be used inside `BackEventProvider` Otherwise, an error will occur.
{% endhint %}

**Example**

```tsx
import { useEffect, useState } from 'react';
import { Alert, Button, View } from 'react-native';
import { useBackEvent } from '@granite-js/react-native';

function UseBackEventExample() {
  const backEvent = useBackEvent();
  const [handler, setHandler] = useState<{ callback: () => void } | undefined>(undefined);

  useEffect(() => {
    const callback = handler?.callback;
    if (callback != null) {
      backEvent.addEventListener(callback);
      return () => {
        backEvent.removeEventListener(callback);
      };
    }
  }, [backEvent, handler]);

  return (
    <View>
      <Button title="Register back event" onPress={() => setHandler({ callback: () => Alert.alert('back') })} />
      <Button title="Remove back event" onPress={() => setHandler(undefined)} />
    </View>
  );
}
```


---

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