OC对数组排序的方法

方法一: 使用sortUsingSelector

如: [_cards sortUsingSelector:@selector(isSortByContactName:)];

[_cards sortUsingSelector:@selector(isSortBYPhoneNumber:)];

-(BOOL)isSortByContactName:(Card *)aCard
{
    if ([_contactName compare:[aCard contactName]] ==NSOrderedDescending) {
        return YES;
    }
    return NO;
}
-(BOOL)isSortBYPhoneNumber:(Card *)aCard
{
    if (_phoneNum>[aCard phoneNum]) {
        return YES;
    }
    return NO;
}

方法二: sortedArrayUsingComparator:

 _seatInfoArray = [_seatInfoArray sortedArrayUsingComparator:^NSComparisonResult(SeatInfoModel *obj1, SeatInfoModel *obj2) {
            NSTimeInterval time1 = obj1.end_unixtime.doubleValue;
            NSTimeInterval time2 = obj2.end_unixtime.doubleValue;
            if (time1<time2) {
                return NSOrderedAscending;
            }
            else
            {
                return NSOrderedDescending;
            }
        }];

方法三：

 NSSortDescriptor *sort = [NSSortDescriptor sortDescriptorWithKey:@"createTime" ascending:YES];

 [_array sortUsingDescriptors:[NSArray arrayWithObject:sort]];