Json Serialisation Swift 3 type error

Question

I am using the following code to receive custom data from a push notification and I get the following error:

Could not cast value of type \'__NSArrayM\' (

Answer 1

Read the error:

Could not cast value of expected type Array to offered type Dictionary

That means your JSON is an array, so

if let customDataString = pushManager.getCustomPushData(pushNotification) {   
   let data = customDataString.data(using: utf8)!
   let jsonData = try? JSONSerialization.jsonObject(with: data) as! [[String:Any]]
   ...

You can omit the options parameter, because .mutableContainers is useless in Swift anyway.