iOS: Array Sorting

ios_array_sorting.m

Basic Array Sort In Ascending Order.
[SomeArrayName sortUsingSelector:@selector(compare:)];

OR


SomeArrayName = [SomeArrayName sortedArrayUsingSelector:@selector(compare:)];Sorting In Descending Order

Sorting In Descending Order.
NSSortDescriptor *sortOrder = [NSSortDescriptor sortDescriptorWithKey: @"self" ascending: NO];
[SomeArrayName sortUsingDescriptors:[NSArray arrayWithObject: sortOrder]];

SomeArrayName = [SomeArrayName sortedArrayUsingDescriptors:[NSArray arrayWithObject: sortOrder]];

Sorting Array Of Dictionary By Key Value.
This function return a sorted array with dictionary by key value.

NSArray* sortArray(NSMutableArray *array, BOOL isAscendingYesNo, NSString* key){
    NSSortDescriptor *sortDescriptor = [[[NSSortDescriptor alloc] initWithKey:key ascending:isAscendingYesNo selector:@selector(localizedCaseInsensitiveCompare:)] autorelease];
    NSArray *descriptorsArray   = [NSArray arrayWithObjects:sortDescriptor, nil];    
    NSArray *sortedArray = [array sortedArrayUsingDescriptors:descriptorsArray]; 
    
    return sortedArray;
}

Usage:

SomeArrayName = sortArray(SomeArrayName, YES, @"name");

Above example display an array of dictionary sorted by "name " key.