NSArray sortedArrayUsingComparator example in Objective C (iOS).

NSArray sortedArrayUsingComparator

Returns an array that lists the receiving array’s elements in ascending order, as determined by the comparison method specified by a given NSComparator Block.

- (NSArray *)sortedArrayUsingComparator:(NSComparator)cmptr

Parameters
cmptr
A comparator block.

Return Value of [NSArray sortedArrayUsingComparator]
An array that lists the receiving array’s elements in ascending order, as determined by the comparison method specified cmptr.

NSArray sortedArrayUsingComparator example.

NSArray *sortedArray = [array sortedArrayUsingComparator: ^(id obj1, id obj2) {

 if ([obj1 integerValue] > [obj2 integerValue]) {
      return (NSComparisonResult)NSOrderedAscending;
 }

 if ([obj1 integerValue] < [obj2 integerValue]) {
      return (NSComparisonResult)NSOrderedDescending;
 }
 return (NSComparisonResult)NSOrderedSame;
}];

Example of [NSArray sortedArrayUsingComparator].

NSArray *sortedArray;
sortedArray = [drinkDetails sortedArrayUsingComparator:^NSComparisonResult(id a, id b) {
    NSDate *first = [(Person*)a birthDate];
    NSDate *second = [(Person*)b birthDate];
    return [first compare:second];
}];

NSArray sortedArrayUsingComparator example.

NSArray *arrayToSort = where ever you get the array from... ;
NSComparisonResult (^sortBlock)(id, id) = ^(id obj1, id obj2) {
  if ([obj1 position] > [obj2 position]) {
    return (NSComparisonResult)NSOrderedDescending;
  }
  if ([obj1 position] < [obj2 position]) {
    return (NSComparisonResult)NSOrderedAscending;
  }
  return (NSComparisonResult)NSOrderedSame;
};
NSArray *sorted = [arrayToSort sortedArrayUsingComparator:sortBlock];

End of NSArray sortedArrayUsingComparator example article.