alert.m

@interface ActionSheetItem : NSObject

@property (copy, nonatomic) NSString *title;

@property (nonatomic, getter=isDestructive) BOOL destructive;
@property (nonatomic, getter=isCancel) BOOL cancel;

@property (copy, nonatomic) void (^actionBlock)();

@property (nonatomic) SEL action;
@property (weak, nonatomic) id target;

- (instancetype)initWithTitle:(NSString *)title target:(id)target action:(SEL)action;
- (instancetype)initWithTitle:(NSString *)title actionBlock:(void (^)())actionBlock;

@end

@interface DestructionActionSheetItem : ActionSheetItem

@end

@interface CancelActionSheetItem : ActionSheetItem

@end

@interface ActionSheetController : NSObject

@property (strong, nonatomic, readonly) UIActionSheet *actionSheet;

@property (copy, nonatomic) NSString *title;

@property (copy, nonatomic) NSArray *items; // array of ActionSheetItem's

@end

@interface ActionSheetItem ()

@property (nonatomic) NSInteger index;

@end

@implementation ActionSheetItem

- (instancetype)initWithTitle:(NSString *)title target:(id)target action:(SEL)action actionBlock:(void (^)())actionBlock
{
    self = [super init];
    if (nil == self)
        return nil;

    self.title = title;
    self.target = target;
    self.action = action;
    self.actionBlock = actionBlock;
    self.index = -1;

    return self;
}

- (instancetype)initWithTitle:(NSString *)title target:(id)target action:(SEL)action
{
    return [self initWithTitle:title target:target action:action actionBlock:nil];
}

- (instancetype)initWithTitle:(NSString *)title actionBlock:(void (^)())actionBlock
{
    return [self initWithTitle:title target:nil action:NULL actionBlock:actionBlock];
}

@end

@implementation DestructionActionSheetItem

- (BOOL)isDestructive
{
    return YES;
}

@end

@implementation CancelActionSheetItem

- (BOOL)isCancel
{
    return YES;
}

@end

@interface ActionSheetItem (ForActionSheetControllerEyes)

@property (nonatomic) NSInteger index;

@end

@interface ActionSheetController () <UIActionSheetDelegate>

@end

@implementation ActionSheetController

@synthesize actionSheet = _actionSheet;
- (UIActionSheet *)actionSheet
{
    if (nil == _actionSheet) {
        _actionSheet = [[UIActionSheet alloc] init];
        _actionSheet.delegate = self;
        _actionSheet.title = self.title;
        for (ActionSheetItem *item in self.items) {
            item.index = [_actionSheet addButtonWithTitle:item.title];
            if (item.isCancel)
                _actionSheet.cancelButtonIndex = item.index;
            if (item.isDestructive)
                _actionSheet.destructiveButtonIndex = item.index;
        }
    }
    return _actionSheet;
}

- (void)setItems:(NSArray *)items
{
    if (_items != items) {
        _items = [items copy];
        _actionSheet = nil;
    }
}

- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex
{
    NSPredicate *predicate = [NSPredicate predicateWithFormat:@"index = %d", buttonIndex];
    ActionSheetItem *item = [_items filteredArrayUsingPredicate:predicate].lastObject;
    if (item.actionBlock)
        item.actionBlock();
    else if (item.target && item.action)
        [[UIApplication sharedApplication] sendAction:item.action to:item.target from:self forEvent:nil];
}

// ...

@end