iOS实现列表折叠效果

#import "TableDownUpVC.h"
#import "TableViewCell_TableSelect.h"

@interface TableDownUpVC ()
{
 NSMutableDictionary *dicSelet;
 NSArray *arrData;
 NSMutableArray *arrStatus;
 NSInteger selectFlag;

 NSMutableDictionary *dictShow;
}

@property (nonatomic, strong) UIImageView *imgArror;

@end

@implementation TableDownUpVC

- (void)viewDidLoad {
 [super viewDidLoad];
 self.tableView.autoresizingMask = UIViewAutoresizingFlexibleHeight;
 self.title = @"列表折叠效果";

 dictShow = [[NSMutableDictionary alloc] init];
 arrStatus = [[NSMutableArray alloc] init];

 NSDictionary *dict0 = @{@"section":@"头部0",
       @"content":@[@{@"title":@"Section0",@"subTitle":@"Row0",@"avator":@"user_default_blue"},
           @{@"title":@"Section0",@"subTitle":@"Row1",@"avator":@"user_default_blue"},
           @{@"title":@"Section0",@"subTitle":@"Row2",@"avator":@"user_default_blue"}]};

 NSDictionary *dict1 = @{@"section":@"头部1",
       @"content":@[@{@"title":@"Section1",@"subTitle":@"Row0",@"avator":@"user_default_blue"},
           @{@"title":@"Section1",@"subTitle":@"Row1",@"avator":@"user_default_blue"},
           @{@"title":@"Section1",@"subTitle":@"Row2",@"avator":@"user_default_blue"}]};

 NSDictionary *dict2 = @{@"section":@"头部2",
       @"content":@[@{@"title":@"Section2",@"subTitle":@"Row0",@"avator":@"user_default_blue"},
           @{@"title":@"Section2",@"subTitle":@"Row1",@"avator":@"user_default_blue"},
           @{@"title":@"Section2",@"subTitle":@"Row2",@"avator":@"user_default_blue"}]};

 arrData = @[dict0,dict1,dict2];

 dicSelet = [[NSMutableDictionary alloc] init];

 //初始化选中状态(默认都不选择)
 for (NSInteger i=0; i