I have a dictionary with multiple dictionary data :
{ 1455201094707 = { }; 1455201116404 = { }: 1455201287530 = { }; }
Get all keys from the dictionary, for this NSDictionary has property allKeys.
NSDictionary
allKeys
Loop all keys, and add object for the key to the array.
Before the all steps above, read documentation!
Good luck!