iOS---》点击uitableview 的section展开或隐藏

#import <UIKit/UIKit.h>



@interface TestCell : UITableViewCell



@property (weak, nonatomic) IBOutlet UILabel *firstLabel;



@property (weak, nonatomic) IBOutlet UILabel *endLabel;

@property (weak, nonatomic) IBOutlet UIView *myView;



@end

#import "TestCell.h"



@implementation TestCell



- (void)awakeFromNib {

    _myView.layer.borderColor=[UIColor clearColor].CGColor;

    

    

    // Initialization code

}



- (void)setSelected:(BOOL)selected animated:(BOOL)animated {

    [super setSelected:selected animated:animated];



    // Configure the view for the selected state

}



@end





#import "ViewController.h"

#import "TestCell.h"

@interface ViewController ()<UITableViewDataSource,UITableViewDelegate>

{



    NSMutableArray *rowArray;

    BOOL *flag;

}

@property (weak, nonatomic) IBOutlet UITableView *myTableView;



@end



@implementation ViewController



- (void)viewDidLoad

{

    [super viewDidLoad];

   

    rowArray=[NSMutableArray arrayWithObjects:@"1",@"2",@"3", @"4",@"5",@"6",@"7",@"8",@"9",nil];

    flag = (BOOL*)malloc(rowArray.count*sizeof(BOOL*));

     memset(flag, NO, sizeof(*flag));

    //_myTableView.separatorStyle=UITableViewCellSeparatorStyleNone;

    // Do any additional setup after loading the view, typically from a nib.

}



- (void)didReceiveMemoryWarning

{

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}

-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView

{

    return rowArray.count;

}

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

{

    if (flag[section]) {

        return rowArray.count;

    }

    else

    {

        return 0;

    }



}

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

{

   

    TestCell *cell=[tableView dequeueReusableCellWithIdentifier:@"TestCell"];

    cell.firstLabel.text=rowArray[indexPath.row];

    cell.endLabel.text=rowArray[indexPath.row];

    

    return cell;

}

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

{

    if (section==0) {

        return [self firstView];

    }

    

   return  [self sectionView:section];

}

-(UIView *)firstView

{

     UIView *contentView=[[UIView alloc]initWithFrame:CGRectMake(0, 0, 320, 32)];

    UILabel *label=[[UILabel alloc]initWithFrame:CGRectMake(10, 15, 40, 15)];

    label.text=@"--1--";

    [contentView addSubview:label];

    return contentView;

}

-(UIView *)sectionView:(NSInteger)section

{

    UIView *contentView=[[UIView alloc]initWithFrame:CGRectMake(0, 0, 320, 32)];

    UIButton *btn=[UIButton buttonWithType:UIButtonTypeCustom];

    btn.frame=CGRectMake(375-50, 15, 30, 16);

    btn.tag=section;

    [btn addTarget:self action:@selector(btnClick:) forControlEvents:UIControlEventTouchUpInside];

    UILabel *label=[[UILabel alloc]initWithFrame:CGRectMake(10, 15, 40, 15)];

    label.text=@"测试";

    if(flag[section])

    {

        [ btn setBackgroundImage:[UIImage imageNamed:@"open"] forState:UIControlStateNormal];

    }

    else

    {

        [ btn setBackgroundImage:[UIImage imageNamed:@"close"] forState:UIControlStateNormal];

    }

    [contentView addSubview:btn];

    [contentView addSubview:label];

    contentView.layer.borderColor=[UIColor lightGrayColor].CGColor;

    contentView.layer.borderWidth=1.0;

    contentView.alpha=1.0;

    return contentView;



}

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

{

    return 40;

}

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

{

    return 2;

}

-(void)btnClick:(UIButton *)sender

{

    int index=(int)sender.tag;

    flag[index]=!flag[index];

    [_myTableView reloadData];

}



@end