iOS tableview cell 的展开收缩

iOS tableview cell 的展开收缩

#import "ViewController.h"

@interface ViewController ()<UITableViewDataSource,UITableViewDelegate>{

NSMutableArray *_allArray;//创建一个数据源数组

NSMutableDictionary *dic;//创建一个字典进行判断收缩还是展开

}

@property (nonatomic,strong)UITableView *tableView;

@end

@implementation ViewController

- (void)viewDidLoad {

[super viewDidLoad];

self.view.backgroundColor = [UIColor whiteColor];

dic = [NSMutableDictionary dictionary];

_allArray = [@[@[@"12",@"32",@"12",@"12",@"12",@"32"],@[@"12",@"12",@"12",@"32",@"12",@"12",@"12",@"32",@"12",@"12",@"12",@"32"],@[@"12",@"12",@"32"]]mutableCopy];

[self.view addSubview:self.tableView];

}

//懒加载

- (UITableView *)tableView{

if (!_tableView) {

_tableView = [[UITableViewalloc]initWithFrame:CGRectMake(0, 64, 375, 667 - 64)style:UITableViewStylePlain];

_tableView.delegate = self;

_tableView.dataSource = self;

}

return _tableView;

}

- (NSInteger)numberOfSectionsInTableView:(UITableView*)tableView{

return _allArray.count;

}

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

return 30;

}

//

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

UIView *view = [UIView new];

view.backgroundColor = [UIColor redColor];

//创建一个手势进行点击，这里可以换成button

UITapGestureRecognizer *tap = [[UITapGestureRecognizeralloc]initWithTarget:self action:@selector(action_tap:)];

view.tag = 300 + section;

[view addGestureRecognizer:tap];

return view;

}

- (void)action_tap:(UIGestureRecognizer *)tap{

NSString *str = [NSStringstringWithFormat:@"%ld",tap.view.tag - 300];

if ([dic[str] integerValue] == 0) {//如果是0，就把1赋给字典,打开cell

[dic setObject:@"1" forKey:str];

}else{//反之关闭cell

[dic setObject:@"0" forKey:str];

}

// [self.tableView reloadData];

[self.tableView reloadSections:[NSIndexSet indexSetWithIndex:[str integerValue]]withRowAnimation:UITableViewRowAnimationFade];//有动画的刷新

}

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

NSString *string = [NSStringstringWithFormat:@"%ld",section];

if ([dic[string] integerValue] == 1 ) {  //打开cell返回数组的count

NSArray *array = [NSArrayarrayWithArray:_allArray[section]];

return array.count;

}else{

return 0;

}

}

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{

return 35;

}

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

UITableViewCell *cell = [tableViewdequeueReusableCellWithIdentifier:@"cell"];

if (!cell) {

cell = [[UITableViewCellalloc]initWithStyle:UITableViewCellStyleValue1reuseIdentifier:@"cell"];

}

cell.backgroundColor = [UIColor orangeColor];

cell.textLabel.text = _allArray[indexPath.section][indexPath.row];

return cell;

}

@end