#import "yxpGroupTBVC.h"

#define  DIC_EXPANDED @"expanded" //是否是展开 0收缩 1展开

#define  DIC_ARARRY @"array"

#define  DIC_TITILESTRING @"title"

#define  CELL_HEIGHT 40.0f

@interfaceyxpGroupTBVC ()<UITableViewDataSource,UITableViewDelegate>

{

   UITableView *_tableVIew;

   NSMutableArray *_DataArray;

}

@end

@implementation yxpGroupTBVC

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil

{

   self = [superinitWithNibName:nibNameOrNilbundle:nibBundleOrNil];

   if (self) {

       /*

         主要思路：

         1.tableView:tableView viewForHeaderInSection:section 添加一个按钮

         2.点击按钮后，判断指定section的数据是否展开

         3.在返回numberOfRowsInSection数量时，如果发现是收缩的，则返回0，展开时，才给真实数据的行号

         这样就可以达到显示/隐含数据的效果

         */

    }

    returnself;

}

//初始化数据

- (void)initDataSource

{

    //创建一个数组

    _DataArray=[[NSMutableArrayalloc]init];

   for (int i=0;i<=5 ; i++) {

        NSMutableArray *array=[[NSMutableArrayalloc]init];

       for (int j=0; j<=5;j++) {

           NSString *string=[NSStringstringWithFormat:@"%i组-%i行",i,j];

            [arrayaddObject:string];

        }

       NSString *string=[NSStringstringWithFormat:@"第%i分组",i];

        //创建一个字典 包含数组，分组名，是否展开的标示

        NSMutableDictionary *dic=[[NSMutableDictionaryalloc]initWithObjectsAndKeys:array,DIC_ARARRY,string,DIC_TITILESTRING,[NSNumbernumberWithInt:0],DIC_EXPANDED,nil];

        //将字典加入数组

        [_DataArrayaddObject:dic];

    }

}

//初始化表

- (void)initTableView

{

    _tableVIew=[[UITableViewalloc]initWithFrame:self.view.boundsstyle:UITableViewStylePlain];

    _tableVIew.dataSource=self;

    _tableVIew.delegate=self;

    [self.viewaddSubview:_tableVIew];

}

- (void)viewDidLoad

{

    [superviewDidLoad];

    [selfinitDataSource];

    [selfinitTableView];

}

#pragma mark -- UITableViewDataSource,UITableViewDelegate

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView

{

    return_DataArray.count;

}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section

{

   NSMutableDictionary *dic=[_DataArrayobjectAtIndex:section];

   NSArray *array=[dicobjectForKey:DIC_ARARRY];

    //判断是收缩还是展开

    if ([[dicobjectForKey:DIC_EXPANDED]intValue]) {

       return array.count;

    }else

    {

       return0;

    }

}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath

{

   staticNSString *acell=@"cell";

    UITableViewCell *cell=[tableViewdequeueReusableCellWithIdentifier:acell];

   if (!cell) {

        cell=[[UITableViewCellalloc]initWithStyle:UITableViewCellStyleDefaultreuseIdentifier:acell];

    }

    NSArray *array=[[_DataArrayobjectAtIndex:indexPath.section] objectForKey:DIC_ARARRY];

    cell.textLabel.text=[arrayobjectAtIndex:indexPath.row];

   return cell;

}

//设置分组头的视图

- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section

{

   UIView *hView = [[UIViewalloc]initWithFrame:CGRectMake(0,0,320, CELL_HEIGHT)];

    hView.backgroundColor=[UIColorwhiteColor];

   UIButton* eButton = [[UIButtonalloc]init];

    //按钮填充整个视图

    eButton.frame = hView.frame;

    [eButtonaddTarget:selfaction:@selector(expandButtonClicked:)

      forControlEvents:UIControlEventTouchUpInside];

    //把节号保存到按钮tag，以便传递到expandButtonClicked方法

    eButton.tag = section;

    //设置图标

    //根据是否展开，切换按钮显示图片

   if ([selfisExpanded:section])

        [eButton setImage: [ UIImageimageNamed:@"mark_up" ]forState:UIControlStateNormal];

   else

        [eButton setImage: [ UIImageimageNamed:@"mark_down" ]forState:UIControlStateNormal];

    //设置分组标题

    [eButton setTitle:[[_DataArrayobjectAtIndex:section] objectForKey:DIC_TITILESTRING]forState:UIControlStateNormal];

    [eButton setTitleColor:[UIColorblackColor]forState:UIControlStateNormal];

    //设置button的图片和标题的相对位置

    //4个参数是到上边界，左边界，下边界，右边界的距离

    eButton.contentHorizontalAlignment =UIControlContentHorizontalAlignmentLeft;

    [eButton setTitleEdgeInsets:UIEdgeInsetsMake(5,5,0,0)];

    [eButton setImageEdgeInsets:UIEdgeInsetsMake(5,300,0,0)];

    //上显示线

   UILabel *label1=[[UILabelalloc]initWithFrame:CGRectMake(0, -1, hView.frame.size.width,1)];

    label1.backgroundColor=[UIColorskyBlueColor];

    [hViewaddSubview:label1];

    //下显示线

   UILabel *label=[[UILabelalloc]initWithFrame:CGRectMake(0, hView.frame.size.height-1, hView.frame.size.width,1)];

    label.backgroundColor=[UIColorskyBlueColor];

    [hViewaddSubview:label];

    [hViewaddSubview: eButton];

   return hView;

}

//单元行内容递进

- (NSInteger)tableView:(UITableView *)tableView indentationLevelForRowAtIndexPath:(NSIndexPath *)indexPath

{

   return2;

}

//控制表头分组表头高度

- (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section

{

    returnCELL_HEIGHT;

}

#pragma mark -- 内部调用

//对指定的节进行“展开/折叠”操作,若原来是折叠的则展开，若原来是展开的则折叠

-(void)collapseOrExpand:(int)section{

   NSMutableDictionary *dic=[_DataArrayobjectAtIndex:section];

   int expanded=[[dicobjectForKey:DIC_EXPANDED]intValue];

   if (expanded) {

        [dic setValue:[NSNumbernumberWithInt:0]forKey:DIC_EXPANDED];

    }else

    {

        [dic setValue:[NSNumbernumberWithInt:1]forKey:DIC_EXPANDED];

    }

}

//返回指定节是否是展开的

-(int)isExpanded:(int)section{

   NSDictionary *dic=[_DataArrayobjectAtIndex:section];

   int expanded=[[dicobjectForKey:DIC_EXPANDED]intValue];

   return expanded;

}

//按钮被点击时触发

-(void)expandButtonClicked:(id)sender{

   UIButton* btn= (UIButton*)sender;

   int section= btn.tag;//取得tag知道点击对应哪个块

    [selfcollapseOrExpand:section];

    //刷新tableview

    [_tableVIewreloadData];

}

@end