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# commit()

Commits all unsaved changes to the event store.

```
func commit() throws
```

## Discussion

This method allows you to save batched changes to the event store. For example, if you pass <doc://com.apple.documentation/documentation/Swift/false> as the `commit` parameter to the [`saveCalendar(_:commit:)`](/documentation/EventKit/EKEventStore/saveCalendar(_:commit:)), [`removeCalendar(_:commit:)`](/documentation/EventKit/EKEventStore/removeCalendar(_:commit:)), [`save(_:span:commit:)`](/documentation/EventKit/EKEventStore/save(_:span:commit:)), or [`remove(_:span:commit:)`](/documentation/EventKit/EKEventStore/remove(_:span:commit:)) methods, the changes aren’t saved until [`commit()`](/documentation/EventKit/EKEventStore/commit()) is invoked. Likewise, if you pass <doc://com.apple.documentation/documentation/Swift/true> as the `commit` parameter to the above methods, you don’t need to call [`commit()`](/documentation/EventKit/EKEventStore/commit()).

> Handling Errors in Swift:
> In Swift, this method returns `Void` and is marked with the `throws` keyword to indicate that it throws an error in cases of failure. Call this method in a `try` expression and handle any errors in the `catch` clauses of a `do` statement, as described in [Error Handling](https://docs.swift.org/swift-book/LanguageGuide/ErrorHandling.html) in [The Swift Programming Language](https://docs.swift.org/swift-book/) and `About Imported Cocoa Error Parameters`.

---

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