Question

Possible Duplicate:
Sorting NSString values as if NSInteger using NSSortDescriptor

I have an Array that I fill with my NSMutableDictionary.. and I use this:

myArray =[[myDict allKeys]sortedArrayUsingSelector:@selector(IDONTKNOW:)];

AllKeys of myDicts are NSStrings… like 123.423 or 423.343… I need to sort the new myArray by incremental numbers.. 12.234 45.3343 522.533 5432.66 etc etc

What must insert in @selector to do this properly? Thanks

Answer 1

You can use an NSSortDescriptor and pass doubleValue as the key.

//sfloats would be your [myDict allKeys]
NSArray *sfloats = @[ @"192.5235", @"235.4362", @"3.235", @"500.235", @"219.72" ];
NSArray *myArray = [sfloats sortedArrayUsingDescriptors:
                    @[[NSSortDescriptor sortDescriptorWithKey:@"doubleValue" 
                                                    ascending:YES]]];

NSLog(@"Sorted: %@", myArray);