Question

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How to sort an NSMutableArray with custom objects in it?

I have a custom class where one of the values are names. Imagine the class is called Person. I would like to sort these values, which I am keeping in an NSMutableArray according to the name variable, however:

[testarray sortUsingSelector:@selector(compare:)];

will only work only an array of strings.

I am trying to work out how I can arrange the array alphabetically given that:

Person *person;
person = [array objectAtIndex:0];
[person name];

Person *person;
person = [array objectAtIndex:1];
[person name];

How can I compare the two? Thanks!

Answer 1

NSSortDescriptor *sortDescriptor = [NSSortDescriptor sortDescriptorWithKey:@"name" ascending:YES];
NSArray *sortDescriptors = [NSArray arrayWithObject:sortDescriptor];
NSArray *sortedArray = [array sortedArrayUsingDescriptors:sortDescriptors];