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# geocodeAddressDictionary(_:completionHandler:)

Submits a forward-geocoding request using the specified address dictionary.

```
func geocodeAddressDictionary(_ addressDictionary: [AnyHashable : Any], completionHandler: @escaping @Sendable ([CLPlacemark]?, (any Error)?) -> Void)
```

## Parameters

`addressDictionary`

An Address Book dictionary containing information about the address to look up.

`completionHandler`

A block object containing the code to execute at the end of the request. This code is called whether the request is successful or unsuccessful.

## Discussion

> Important:
> You can call this method from synchronous code using a completion handler, as shown on this page, or you can call it as an asynchronous method that has the following declaration:
> 
> ```swift
> func geocodeAddressDictionary(_ addressDictionary: [AnyHashable : Any]) async throws -> [CLPlacemark]
> ```
> 
> For information about concurrency and asynchronous code in Swift, see <doc://com.apple.documentation/documentation/Swift/calling-objective-c-apis-asynchronously>.

This method submits the specified location data to the geocoding server asynchronously and returns. Your completion handler block will be executed on the main thread.

After initiating a forward-geocoding request, do not attempt to initiate another forward- or reverse-geocoding request. Geocoding requests are rate-limited for each app, so making too many requests in a short period of time may cause some of the requests to fail. When the maximum rate is exceeded, the geocoder passes an error object with the value [`CLError.Code.network`](/documentation/CoreLocation/CLError-swift.struct/Code/network) to your completion handler.

---

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