（1）第一步设置一下button

IBOutlet NSButton * nameOrderBT;    IBOutlet NSButton * sizeOrderBT;

（2）切换设置切换相遇函数

-(IBAction) nameOrderAction:(id)sender{        [sizeOrderBT setTitle:@"Width"];    if ([nameOrderBT.title isEqualToString:@"Name⬆️"])     {        [nameOrderBT setTitle:@"Name⬇️"];                _itemOrder=RFICONMODEL_ORDER_FILENAME_DESC;            }    else{        [nameOrderBT setTitle:@"Name⬆️"];        _itemOrder=RFICONMODEL_ORDER_FILENAME_ASC;    }    [self updateTable];    return;    }-(IBAction) sizeOrderAction:(id)sender{    [nameOrderBT setTitle:@"Name"];    if ([sizeOrderBT.title isEqualToString:@"Width⬆️"])     {        [sizeOrderBT setTitle:@"Width⬇️"];        _itemOrder=RFICONMODEL_ORDER_IMAGEWIDTH_DESC;    }    else{        [sizeOrderBT setTitle:@"Width⬆️"];        _itemOrder=RFICONMODEL_ORDER_IMAGEWIDTH_ASC;    }    [self updateTable];    return;}

（3）设置item获取顺序

{    if (_itemOrder==nil) {        _itemOrder=@"";            }    return _itemOrder;}-(NSMutableArray*) getItemsArray{    if (itemsArray==nil) {        itemsArray=[NSMutableArray array];        //NSArray * modelArray=[RFIConModel getItemByGroupName:[self getGroupNameBySafe]];        NSArray * modelArray=[RFIConModel getItemByGroupName:[self getGroupNameBySafe] order:[self getItemOrderBySafe]];        for (RFIConModel * model in modelArray) {            ItemPreCellVC * oneVC=[[ItemPreCellVC alloc] init];            oneVC.itemModel=model;            [itemsArray addObject:oneVC];        }    }    return itemsArray;}

其中[RFIConModel getItemByGroupName:[self getGroupNameBySafe] order:[self getItemOrderBySafe]]是order关键，这样只需设施一下itemOrder，就可自动更新内容了。