动态可展开和折叠 table 视图单元格？
Dynamic expandable and collapsed table view cells?
我为来自服务器的动态数据开发了可展开和折叠的 table 视图。我在 header 视图中成功显示州名，但我无法显示 child 与州名相关的地区数据。
为了这个http://www.iostute.com/2015/04/expandable-and-collapsable-tableview.html
我关注了Link
我的数据是
_response = @{@"Response":@{@"status":@"SUCCESS",@"error_code":@"0",@"message":@"SUCCESS",@"Array":@[
@{@"state_id":@"0",@"state_name":@"null",@"district_id":@"0",@"district_name":@"null"},
@{@"state_id":@"01",@"state_name":@"State1",@"district_id":@"001",@"district_name":@"State1District1"},
@{@"state_id":@"02",@"state_name":@"State2",@"district_id":@"004",@"district_name":@"State2District1"},
@{@"state_id":@"02",@"state_name":@"State2",@"district_id":@"005",@"district_name":@"State3District1"},
@{@"state_id":@"01",@"state_name":@"State1",@"district_id":@"002",@"district_name":@"State1District2"},
@{@"state_id":@"01",@"state_name":@"State1",@"district_id":@"003",@"district_name":@"State1District3"},
@{@"state_id":@"03",@"state_name":@"State3",@"district_id":@"006",@"district_name":@"State3District1"},
@{@"state_id":@"04",@"state_name":@"State4",@"district_id":@"008",@"district_name":@"State4District1"},
@{@"state_id":@"04",@"state_name":@"State4",@"district_id":@"009",@"district_name":@"State4District2"},
@{@"state_id":@"04",@"state_name":@"State4",@"district_id":@"010",@"district_name":@"State4District3"},
@{@"state_id":@"05",@"state_name":@"State5",@"district_id":@"011",@"district_name":@"State5District1"},
@{@"state_id":@"05",@"state_name":@"State5",@"district_id":@"012",@"district_name":@"State5District2"},
@{@"state_id":@"03",@"state_name":@"State3",@"district_id":@"007",@"district_name":@"State3District2"}]}, @"count":@"6"};
我的密码是
if ([[[_response objectForKey:@"Response"] objectForKey:@"status"] isEqualToString:@"SUCCESS"] && (!(_integer == 0))) {
_stateID = [[NSMutableArray alloc] init];
_stateName = [[NSMutableArray alloc] init];
_districtID = [[NSMutableArray alloc] init];
_districtName = [[NSMutableArray alloc] init];
_stateIdStateNameDic = [[NSMutableDictionary alloc]init];
//Add arrays to array to remove null values dynamically
NSArray *arr = [[NSArray alloc]initWithObjects:_stateID, _stateName, _districtID, _districtName, nil];
for (int i=0; i<_integer; i++) {
[_stateID addObject:[[[[_response objectForKey:@"Response"] objectForKey:@"Array"] objectAtIndex:i] objectForKey:@"state_id"]];
[_stateName addObject:[[[[_response objectForKey:@"Response"] objectForKey:@"Array"] objectAtIndex:i] objectForKey:@"state_name"]];
[_districtID addObject:[[[[_response objectForKey:@"Response"] objectForKey:@"Array"] objectAtIndex:i] objectForKey:@"district_id"]];
[_districtName addObject:[[[[_response objectForKey:@"Response"] objectForKey:@"Array"] objectAtIndex:i] objectForKey:@"district_name"]];
//Remove null values
for (int j=0; j<arr.count; j++) {
for (NSMutableArray *ar in arr) {
if ([[ar objectAtIndex:i] isKindOfClass:[NSNull class]] || [[ar objectAtIndex:i] isEqualToString:@"null"] || [[ar objectAtIndex:i] isEqualToString:@"0"]) {
[ar addObject:@""];
[ar removeObjectAtIndex:i];
}
}
}
}
//Add arrays to mutable array to remove empty objects
NSMutableArray *marr = [[NSMutableArray alloc]initWithObjects:_stateID, _stateName, _districtID, _districtName, nil];
//Remove empty objects from all arrays
for (int j=0; j<marr.count; j++) {
for (int i=0; i<[[marr objectAtIndex:j] count]; i++) {
if ([[[marr objectAtIndex:j] objectAtIndex:i] isEqualToString:@""]) {
[[marr objectAtIndex:j] removeObjectAtIndex:i];
}
}
}
//Remove duplicates from state names array
_stateName = [_stateName valueForKeyPath:@"@distinctUnionOfObjects.self"];
NSString *districtName = @"";
NSString * superater = @"&&";
_mdic = [[NSMutableDictionary alloc]init];
for (int j=0; j<_stateName.count; j++) {
for (int i=0; i<_integer; i++) {
if ([[_stateName objectAtIndex:j] isEqualToString:[[[[_response objectForKey:@"Response"] objectForKey:@"Array"] objectAtIndex:i] objectForKey:@"state_name"]]) {
//Remove district name if empty or null
if ([districtName isEqualToString:@""] || [districtName isEqual:[NSNull null]]) {
districtName = [[[[_response objectForKey:@"Response"] objectForKey:@"Array"] objectAtIndex:i] objectForKey:@"district_name"];
if ([districtName isEqual:[NSNull null]] || [districtName isEqualToString:@"null"]) {
districtName = @"";
}
} else {
//Add all districts with superater &&
districtName = [districtName stringByAppendingString:[NSString stringWithFormat:@"%@%@", superater, [[[[_response objectForKey:@"Response"] objectForKey:@"Array"] objectAtIndex:i] objectForKey:@"district_name"]]];
}
}
}
//Create district names dictionary with state name keys
[_mdic setValue:districtName forKey:[_stateName objectAtIndex:j]];
districtName = @"";
}
NSLog(@"_mdic %@", _mdic);
_arrayForBool=[[NSMutableArray alloc]init];
//Save bool value " NO " based on sectionTitleArray count.
for (int i=0; i<[_stateName count]; i++) {
[_arrayForBool addObject:[NSNumber numberWithBool:NO]];
}
dispatch_async(dispatch_get_main_queue(), ^{
[_availableOrdersTableView reloadData];
});
} else {
}
// TableView 代表
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return [_mdic count];
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
// Number of rows in each section
if ([[_arrayForBool objectAtIndex:section] boolValue]) {
NSLog(@"%@", [_stateName objectAtIndex:section]);
NSLog(@"%@", _mdic);
NSArray *mdicKeys = [_mdic allKeys];
for (int i=0; i<_mdic.count; i++) {
if ([[mdicKeys objectAtIndex:i] isEqualToString:[_stateName objectAtIndex:section]]) {
NSString *str = [_mdic objectForKey:[_stateName objectAtIndex:section]];
NSLog(@"%@", str);
_subDistrictArr = [str componentsSeparatedByString:@"&&"];
}
}
NSLog(@"_subDistrictIDArr %@", _subDistrictArr);
return _subDistrictArr.count;
} else {
return 0;
}
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
//Create cell
static NSString *cellid=@"cell";
UITableViewCell *cell=[tableView dequeueReusableCellWithIdentifier:cellid];
if (cell==nil) {
cell=[[UITableViewCell alloc]initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:cellid];
}
BOOL manyCells = [[_arrayForBool objectAtIndex:indexPath.section] boolValue];
/********** If the section supposed to be closed *******************/
if(!manyCells)
{
cell.backgroundColor=[UIColor clearColor];
cell.textLabel.text=@"";
}
/********** If the section supposed to be Opened *******************/
else {
cell.textLabel.text=[_subDistrictArr objectAtIndex:indexPath.row];
if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) {
cell.textLabel.font=[UIFont systemFontOfSize:20.0f];
} else {
cell.textLabel.font=[UIFont systemFontOfSize:15.0f];
}
cell.backgroundColor=[UIColor whiteColor];
cell.selectionStyle=UITableViewCellSelectionStyleNone ;
}
cell.textLabel.textColor=[UIColor blackColor];
/********** Add a custom Separator with cell *******************/
UIView* separatorLineView = [[UIView alloc] initWithFrame:CGRectMake(15, 48, _availableOrdersTableView.frame.size.width-15, 1)];
separatorLineView.backgroundColor = [UIColor blackColor];
[cell.contentView addSubview:separatorLineView];
return cell;
}
- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section {
UIView *sectionView=[[UIView alloc]initWithFrame:CGRectMake(0, 0, _availableOrdersTableView.frame.size.width, 50)];
sectionView.backgroundColor = [UIColor clearColor];
sectionView.tag=section;
UILabel *viewLabel=[[UILabel alloc]initWithFrame:CGRectMake(0, 0, _availableOrdersTableView.frame.size.width, sectionView.frame.size.height)];
viewLabel.backgroundColor=[UIColor clearColor];
viewLabel.textColor=[UIColor blackColor];
if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) {
viewLabel.font=[UIFont systemFontOfSize:25];
} else {
viewLabel.font=[UIFont systemFontOfSize:15];
}
viewLabel.text=[NSString stringWithFormat:@"%@", [_stateName objectAtIndex:section]];
_stateIDString = [_stateID objectAtIndex:section];
NSLog(@"stateIDString %@", _stateIDString);
[sectionView addSubview:viewLabel];
if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) {
UIImageView *imgView = [[UIImageView alloc]initWithFrame:CGRectMake(sectionView.frame.size.width-45, (sectionView.frame.size.height-25)/2, 18, 17)];
imgView.tag = section;
imgView.image = [UIImage imageNamed:@"DA"];
[sectionView addSubview:imgView];
} else {
UIImageView *imgView = [[UIImageView alloc]initWithFrame:CGRectMake(sectionView.frame.size.width-35, (sectionView.frame.size.height-25)/2, 18, 17)];
imgView.tag = section;
imgView.image = [UIImage imageNamed:@"DA"];
[sectionView addSubview:imgView];
}
/********** Add a custom Separator with Section view *******************/
UIView* separatorLineView = [[UIView alloc] initWithFrame:CGRectMake(0, sectionView.frame.size.height, _availableOrdersTableView.frame.size.width, 1)];
separatorLineView.backgroundColor = [UIColor blackColor];
[sectionView addSubview:separatorLineView];
/********** Add UITapGestureRecognizer to SectionView **************/
UITapGestureRecognizer *headerTapped = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(sectionHeaderTapped:)];
[sectionView addGestureRecognizer:headerTapped];
return sectionView;
}
- (void)sectionHeaderTapped:(UITapGestureRecognizer *)gestureRecognizer {
NSIndexPath *indexPath = [NSIndexPath indexPathForRow:0 inSection:gestureRecognizer.view.tag];
// _gestureInteger = gestureRecognizer.view.tag;
if (indexPath.row == 0) {
BOOL collapsed = [[_arrayForBool objectAtIndex:indexPath.section] boolValue];
for (int i=0; i<[_stateName count]; i++) {
if (indexPath.section==i) {
[_arrayForBool replaceObjectAtIndex:i withObject:[NSNumber numberWithBool:!collapsed]];
}
}
[_availableOrdersTableView reloadSections:[NSIndexSet indexSetWithIndex:gestureRecognizer.view.tag] withRowAnimation:UITableViewRowAnimationAutomatic];
// [_availableOrdersTableView reloadData];
}
}
我有两个解决方案
(1) 最初您将任何部分的 numberofrow 设置为零，然后单击任何部分后您可以为单击的部分添加行。
(2) 节数将为一个，您需要使用两个单元格 "cellwithheaderonly" 和 "cellwithheaderandsubpart" 最初您将使用 "cellwithheaderonly" 并且当用户单击任何单元格时需要使用 "cellwithheaderandsubpart"
可以参考以下URL
Expanding and Collapsing table view cells in ios
https://www.anexinet.com/blog/expandable-collapsible-uitableview-sections/
您必须维护下面给出的数组：-
lat arr = [[“name”:”firstRow” , “subRowArray”:[1,2,3,4]],[“name”:”secondRow” , “subRowArray”:[1,2,3,4]],[“name”:”thirdRow” , “subRowArray”:[1,2,3,4]]]
然后根据您的排列展开和折叠。
如果您想使用图书馆，请选择 expendable Tableview
我为来自服务器的动态数据开发了可展开和折叠的 table 视图。我在 header 视图中成功显示州名，但我无法显示 child 与州名相关的地区数据。
为了这个http://www.iostute.com/2015/04/expandable-and-collapsable-tableview.html
我关注了Link我的数据是
_response = @{@"Response":@{@"status":@"SUCCESS",@"error_code":@"0",@"message":@"SUCCESS",@"Array":@[
@{@"state_id":@"0",@"state_name":@"null",@"district_id":@"0",@"district_name":@"null"},
@{@"state_id":@"01",@"state_name":@"State1",@"district_id":@"001",@"district_name":@"State1District1"},
@{@"state_id":@"02",@"state_name":@"State2",@"district_id":@"004",@"district_name":@"State2District1"},
@{@"state_id":@"02",@"state_name":@"State2",@"district_id":@"005",@"district_name":@"State3District1"},
@{@"state_id":@"01",@"state_name":@"State1",@"district_id":@"002",@"district_name":@"State1District2"},
@{@"state_id":@"01",@"state_name":@"State1",@"district_id":@"003",@"district_name":@"State1District3"},
@{@"state_id":@"03",@"state_name":@"State3",@"district_id":@"006",@"district_name":@"State3District1"},
@{@"state_id":@"04",@"state_name":@"State4",@"district_id":@"008",@"district_name":@"State4District1"},
@{@"state_id":@"04",@"state_name":@"State4",@"district_id":@"009",@"district_name":@"State4District2"},
@{@"state_id":@"04",@"state_name":@"State4",@"district_id":@"010",@"district_name":@"State4District3"},
@{@"state_id":@"05",@"state_name":@"State5",@"district_id":@"011",@"district_name":@"State5District1"},
@{@"state_id":@"05",@"state_name":@"State5",@"district_id":@"012",@"district_name":@"State5District2"},
@{@"state_id":@"03",@"state_name":@"State3",@"district_id":@"007",@"district_name":@"State3District2"}]}, @"count":@"6"};
我的密码是
if ([[[_response objectForKey:@"Response"] objectForKey:@"status"] isEqualToString:@"SUCCESS"] && (!(_integer == 0))) {
_stateID = [[NSMutableArray alloc] init];
_stateName = [[NSMutableArray alloc] init];
_districtID = [[NSMutableArray alloc] init];
_districtName = [[NSMutableArray alloc] init];
_stateIdStateNameDic = [[NSMutableDictionary alloc]init];
//Add arrays to array to remove null values dynamically
NSArray *arr = [[NSArray alloc]initWithObjects:_stateID, _stateName, _districtID, _districtName, nil];
for (int i=0; i<_integer; i++) {
[_stateID addObject:[[[[_response objectForKey:@"Response"] objectForKey:@"Array"] objectAtIndex:i] objectForKey:@"state_id"]];
[_stateName addObject:[[[[_response objectForKey:@"Response"] objectForKey:@"Array"] objectAtIndex:i] objectForKey:@"state_name"]];
[_districtID addObject:[[[[_response objectForKey:@"Response"] objectForKey:@"Array"] objectAtIndex:i] objectForKey:@"district_id"]];
[_districtName addObject:[[[[_response objectForKey:@"Response"] objectForKey:@"Array"] objectAtIndex:i] objectForKey:@"district_name"]];
//Remove null values
for (int j=0; j<arr.count; j++) {
for (NSMutableArray *ar in arr) {
if ([[ar objectAtIndex:i] isKindOfClass:[NSNull class]] || [[ar objectAtIndex:i] isEqualToString:@"null"] || [[ar objectAtIndex:i] isEqualToString:@"0"]) {
[ar addObject:@""];
[ar removeObjectAtIndex:i];
}
}
}
}
//Add arrays to mutable array to remove empty objects
NSMutableArray *marr = [[NSMutableArray alloc]initWithObjects:_stateID, _stateName, _districtID, _districtName, nil];
//Remove empty objects from all arrays
for (int j=0; j<marr.count; j++) {
for (int i=0; i<[[marr objectAtIndex:j] count]; i++) {
if ([[[marr objectAtIndex:j] objectAtIndex:i] isEqualToString:@""]) {
[[marr objectAtIndex:j] removeObjectAtIndex:i];
}
}
}
//Remove duplicates from state names array
_stateName = [_stateName valueForKeyPath:@"@distinctUnionOfObjects.self"];
NSString *districtName = @"";
NSString * superater = @"&&";
_mdic = [[NSMutableDictionary alloc]init];
for (int j=0; j<_stateName.count; j++) {
for (int i=0; i<_integer; i++) {
if ([[_stateName objectAtIndex:j] isEqualToString:[[[[_response objectForKey:@"Response"] objectForKey:@"Array"] objectAtIndex:i] objectForKey:@"state_name"]]) {
//Remove district name if empty or null
if ([districtName isEqualToString:@""] || [districtName isEqual:[NSNull null]]) {
districtName = [[[[_response objectForKey:@"Response"] objectForKey:@"Array"] objectAtIndex:i] objectForKey:@"district_name"];
if ([districtName isEqual:[NSNull null]] || [districtName isEqualToString:@"null"]) {
districtName = @"";
}
} else {
//Add all districts with superater &&
districtName = [districtName stringByAppendingString:[NSString stringWithFormat:@"%@%@", superater, [[[[_response objectForKey:@"Response"] objectForKey:@"Array"] objectAtIndex:i] objectForKey:@"district_name"]]];
}
}
}
//Create district names dictionary with state name keys
[_mdic setValue:districtName forKey:[_stateName objectAtIndex:j]];
districtName = @"";
}
NSLog(@"_mdic %@", _mdic);
_arrayForBool=[[NSMutableArray alloc]init];
//Save bool value " NO " based on sectionTitleArray count.
for (int i=0; i<[_stateName count]; i++) {
[_arrayForBool addObject:[NSNumber numberWithBool:NO]];
}
dispatch_async(dispatch_get_main_queue(), ^{
[_availableOrdersTableView reloadData];
});
} else {
}
// TableView 代表
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return [_mdic count];
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
// Number of rows in each section
if ([[_arrayForBool objectAtIndex:section] boolValue]) {
NSLog(@"%@", [_stateName objectAtIndex:section]);
NSLog(@"%@", _mdic);
NSArray *mdicKeys = [_mdic allKeys];
for (int i=0; i<_mdic.count; i++) {
if ([[mdicKeys objectAtIndex:i] isEqualToString:[_stateName objectAtIndex:section]]) {
NSString *str = [_mdic objectForKey:[_stateName objectAtIndex:section]];
NSLog(@"%@", str);
_subDistrictArr = [str componentsSeparatedByString:@"&&"];
}
}
NSLog(@"_subDistrictIDArr %@", _subDistrictArr);
return _subDistrictArr.count;
} else {
return 0;
}
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
//Create cell
static NSString *cellid=@"cell";
UITableViewCell *cell=[tableView dequeueReusableCellWithIdentifier:cellid];
if (cell==nil) {
cell=[[UITableViewCell alloc]initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:cellid];
}
BOOL manyCells = [[_arrayForBool objectAtIndex:indexPath.section] boolValue];
/********** If the section supposed to be closed *******************/
if(!manyCells)
{
cell.backgroundColor=[UIColor clearColor];
cell.textLabel.text=@"";
}
/********** If the section supposed to be Opened *******************/
else {
cell.textLabel.text=[_subDistrictArr objectAtIndex:indexPath.row];
if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) {
cell.textLabel.font=[UIFont systemFontOfSize:20.0f];
} else {
cell.textLabel.font=[UIFont systemFontOfSize:15.0f];
}
cell.backgroundColor=[UIColor whiteColor];
cell.selectionStyle=UITableViewCellSelectionStyleNone ;
}
cell.textLabel.textColor=[UIColor blackColor];
/********** Add a custom Separator with cell *******************/
UIView* separatorLineView = [[UIView alloc] initWithFrame:CGRectMake(15, 48, _availableOrdersTableView.frame.size.width-15, 1)];
separatorLineView.backgroundColor = [UIColor blackColor];
[cell.contentView addSubview:separatorLineView];
return cell;
}
- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section {
UIView *sectionView=[[UIView alloc]initWithFrame:CGRectMake(0, 0, _availableOrdersTableView.frame.size.width, 50)];
sectionView.backgroundColor = [UIColor clearColor];
sectionView.tag=section;
UILabel *viewLabel=[[UILabel alloc]initWithFrame:CGRectMake(0, 0, _availableOrdersTableView.frame.size.width, sectionView.frame.size.height)];
viewLabel.backgroundColor=[UIColor clearColor];
viewLabel.textColor=[UIColor blackColor];
if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) {
viewLabel.font=[UIFont systemFontOfSize:25];
} else {
viewLabel.font=[UIFont systemFontOfSize:15];
}
viewLabel.text=[NSString stringWithFormat:@"%@", [_stateName objectAtIndex:section]];
_stateIDString = [_stateID objectAtIndex:section];
NSLog(@"stateIDString %@", _stateIDString);
[sectionView addSubview:viewLabel];
if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) {
UIImageView *imgView = [[UIImageView alloc]initWithFrame:CGRectMake(sectionView.frame.size.width-45, (sectionView.frame.size.height-25)/2, 18, 17)];
imgView.tag = section;
imgView.image = [UIImage imageNamed:@"DA"];
[sectionView addSubview:imgView];
} else {
UIImageView *imgView = [[UIImageView alloc]initWithFrame:CGRectMake(sectionView.frame.size.width-35, (sectionView.frame.size.height-25)/2, 18, 17)];
imgView.tag = section;
imgView.image = [UIImage imageNamed:@"DA"];
[sectionView addSubview:imgView];
}
/********** Add a custom Separator with Section view *******************/
UIView* separatorLineView = [[UIView alloc] initWithFrame:CGRectMake(0, sectionView.frame.size.height, _availableOrdersTableView.frame.size.width, 1)];
separatorLineView.backgroundColor = [UIColor blackColor];
[sectionView addSubview:separatorLineView];
/********** Add UITapGestureRecognizer to SectionView **************/
UITapGestureRecognizer *headerTapped = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(sectionHeaderTapped:)];
[sectionView addGestureRecognizer:headerTapped];
return sectionView;
}
- (void)sectionHeaderTapped:(UITapGestureRecognizer *)gestureRecognizer {
NSIndexPath *indexPath = [NSIndexPath indexPathForRow:0 inSection:gestureRecognizer.view.tag];
// _gestureInteger = gestureRecognizer.view.tag;
if (indexPath.row == 0) {
BOOL collapsed = [[_arrayForBool objectAtIndex:indexPath.section] boolValue];
for (int i=0; i<[_stateName count]; i++) {
if (indexPath.section==i) {
[_arrayForBool replaceObjectAtIndex:i withObject:[NSNumber numberWithBool:!collapsed]];
}
}
[_availableOrdersTableView reloadSections:[NSIndexSet indexSetWithIndex:gestureRecognizer.view.tag] withRowAnimation:UITableViewRowAnimationAutomatic];
// [_availableOrdersTableView reloadData];
}
}
我有两个解决方案
(1) 最初您将任何部分的 numberofrow 设置为零，然后单击任何部分后您可以为单击的部分添加行。
(2) 节数将为一个，您需要使用两个单元格 "cellwithheaderonly" 和 "cellwithheaderandsubpart" 最初您将使用 "cellwithheaderonly" 并且当用户单击任何单元格时需要使用 "cellwithheaderandsubpart"
可以参考以下URL
Expanding and Collapsing table view cells in ios
https://www.anexinet.com/blog/expandable-collapsible-uitableview-sections/
您必须维护下面给出的数组：-
lat arr = [[“name”:”firstRow” , “subRowArray”:[1,2,3,4]],[“name”:”secondRow” , “subRowArray”:[1,2,3,4]],[“name”:”thirdRow” , “subRowArray”:[1,2,3,4]]]
然后根据您的排列展开和折叠。 如果您想使用图书馆，请选择 expendable Tableview