Question

I have a clear history button which clears the data in plist. Now, loading is fine; I load it to an array.

Can I just use:

self.dataClear = NULL;

and save back the array to plist to clear it?
So that I can use

if([self.dataClear count] == 0)//if plist is empty

to check?

Answer 1

You’d probably be better off using a NSMutableArray and calling removeAllObjects on that instead of NULLing it out; otherwise, there won’t be any object there to respond to your count message, since there’s a conceptual difference between “empty array” and “no array at all”.