How to use arrayWithContentsOfFile to load file successfully written with writeToFile in ObjectiveC/XCode

Question

I am saving an array of custom objects to a plist list file like so:

+(void) arrayToPlist: (NSArray*) plant_types{
    NSMutableArray* dictionary_array = [NS         


        

Answer 1

This line:

NSMutableDictionary* dict = [plant_dicts objectAtIndex: i];

does not return a mutable dictionary, but an immutable one.

If you want it to be mutable, you should do something along these lines:

MutableDictionary* dict = [NSMutableDictionary dictionaryWithDictionary: [plant_dicts objectAtIndex: i]];