---
title: "NSDictionary(Pebble) Category Reference"
canonical_url: https://developer.repebble.com/docs/pebblekit-ios/Categories/NSDictionary+Pebble/
last_updated: 2026-10-28
sdk_version: 4.33.1
---
# NSDictionary(Pebble) Category Reference

Source: https://developer.repebble.com/docs/pebblekit-ios/Categories/NSDictionary+Pebble/

| Declared in | NSDictionary+Pebble.h |

### – pb\_pebbleDictionaryData:

Serializes the receiver into a Pebble dict.

`- (nullable NSData *)pb_pebbleDictionaryData:(NSError *__autoreleasing *)error`

#### Parameters
_error_Pointer to an NSError \* that will be set in case there was an error creating the dictionary. Possible error codes: PBErrorCodeDictionaryUnsupportedKeyClass PBErrorCodeDictionaryUnsupportedValueClass PBErrorCodeDictionaryUnsupportedValueClass 

#### Discussion

The receiver dictionary must comply to the following constraints:

- The keys must be instances of `NSNumber`. Their `-unsignedLongValue` return value will be used as final key.
- The values must be instances of either `NSString`, `NSData` or `NSNumber`. Use the `NSNumber (stdint)` category to specify the signedness and width of `NSNumber`.

#### See Also

- `[NSData(Pebble) pb_dictionaryFromPebbleDictionaryDataWithError:]`

#### Declared In

`NSDictionary+Pebble.h`