iOS中的可擴展列表視圖
[英]expandable list view in iOS
問題描述
我需要在我的iOS應用程序中創建可擴展的列表視圖，即。 如果你點擊一個單元格，它應該擴展以提供更多的單元格。 我正在按照此鏈接給出的示例： 切換顯示/隱藏子表格單元iOS此處也給出了實現文件的代碼： http ： //pastie.org/7756763
但是，在上面的示例中，數組是固定的。 我有一個sqlite數據庫，我存儲任務和開始日期等等。 我需要創建一個可擴展的視圖，其中不同的行是不同的開始日期，當我點擊日期時，它應該給出該日期的任務。 這是代碼：
- (void)viewDidLoad
{
[super viewDidLoad];
allDates = [[NSMutableArray alloc]init];
self.date = [[NSMutableArray alloc] initWithObjects: nil];
// self.date = [[NSMutableArray alloc]init];
self.listOfSections_DataSource = [[NSMutableArray alloc]initWithObjects:nil];
sqlite3_stmt *statement;
const char *dbpath = [mDatabasePath UTF8String];
if (sqlite3_open(dbpath,&mDiary)== SQLITE_OK) {
NSString *selectSQL = [NSString stringWithFormat:@"SELECT * FROM TODO"];
const char *query_stmt = [selectSQL UTF8String];
if (sqlite3_prepare_v2(mDiary,
query_stmt, -1, &statement, NULL) == SQLITE_OK)
{
while(sqlite3_step(statement) == SQLITE_ROW)
{
tempTaskName = [[NSString alloc]initWithUTF8String:(const char *) sqlite3_column_text(statement, 2)];
[allDates addObject:[[NSString alloc]initWithUTF8String:(const char *) sqlite3_column_text(statement, 0)]];
[self.date addObject:tempTaskName];
}
}
sqlite3_finalize(statement);
}
sqlite3_close(mDiary);
NSLog(@"%i",[allDates count]);
for(int x = 0;x < [allDates count];x++)
{
if (sqlite3_open(dbpath,&mDiary)== SQLITE_OK) {
NSString *selectSQL = [NSString stringWithFormat:@"SELECT * FROM TODO"];
const char *query_stmt = [selectSQL UTF8String];
if (sqlite3_prepare_v2(mDiary,
query_stmt, -1, &statement, NULL) == SQLITE_OK){
temp = [[NSMutableArray alloc]init];
while(sqlite3_step(statement) == SQLITE_ROW)
{
tempTaskName = [[NSString alloc]initWithUTF8String:(const char *) sqlite3_column_text(statement, 2)];
NSLog(@"%@",tempTaskName);
// [allDates addObject:[[NSString alloc]initWithUTF8String:(const char *) sqlite3_column_text(statement, 0)]];
if([[[NSString alloc]initWithUTF8String:(const char *) sqlite3_column_text(statement, 0)] isEqualToString:allDates[x]])
{
[self.temp addObject:tempTaskName];
}
}
NSLog(@"task name%@",temp);
[listOfSections_DataSource addObject:temp];
} sqlite3_finalize(statement);
}
sqlite3_close(mDiary);
}
//[self.listOfSections_DataSource addObject:allDates];
NSMutableArray *emptyArray = [[NSMutableArray alloc]init];
listOfSections = [[NSMutableArray alloc]init];
for (int i = 0;i<[allDates count]; i++) {
[listOfSections addObject:emptyArray];
}
self.selectedSection = -1;
self.selectedSectionTail = -1;
}
表視圖方法是：
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return [listOfSections_DataSource count];
}
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
if(selectedSection !=section)
return 1;
else{
NSArray *array = [listOfSections objectAtIndex:section];
return [array count];
}
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = @"cell";
if(self.selectedSection == indexPath.section){//this is just to check to see if this section is the one we touched
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil)
{
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
NSArray *myArray = [listOfSections_DataSource objectAtIndex:indexPath.section];//this now contains your cities
NSString* myString = [myArray objectAtIndex:indexPath.row]; // get city for that row, under the state
cell.textLabel.text = myString;
return cell;
}
else{//THIS IS going to happen the first time
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil)
{
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
cell.textLabel.text = @"more";
return cell;
}
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell * cell = [tableView cellForRowAtIndexPath:indexPath];
//check to see if the cell is for exapnding or for selection
if([cell.textLabel.text isEqualToString:@"more"]){ // this means we need to expand
listOfSections = [[NSMutableArray alloc]init];
//setting up the list of section with empty arrays
NSMutableArray *emptyArray = [[NSMutableArray alloc]init];
for (int i = 0;i<[allDates count]; i++) {
[listOfSections addObject:emptyArray];
}
//Add array of tasks here
[listOfSections replaceObjectAtIndex:indexPath.section withObject:[listOfSections_DataSource objectAtIndex:indexPath.section]];
int tapedRow = [indexPath section];
self.selectedSection = tapedRow;
NSMutableIndexSet *myIndexSet = [[NSMutableIndexSet alloc]init];
[myIndexSet addIndex:selectedSection];
[myIndexSet addIndex:selectedSectionTail];
// Updating section in the tableview
if(selectedSectionTail!=-1)
[taskTable reloadSections:(NSIndexSet*)myIndexSet withRowAnimation:UITableViewRowAnimationFade];
else {
[taskTable reloadSections:[NSIndexSet indexSetWithIndex:indexPath.section] withRowAnimation:
UITableViewRowAnimationFade];
}
//[taskTable reloadData];
}
else{
}
selectedSectionTail = selectedSection;
}
這里的問題是：1。屏幕上顯示的部分數量是正確的，但是當點擊第一個單元格時，它會消失。 2.當點擊任何單元格時，列表不會擴展。
請有人幫幫我嗎？ 謝謝..
4 個解決方案
解決方案1
2 已采納 2013-05-03 08:34:53
您可以找到以下示例： http ： //developer.apple.com/library/ios/#samplecode/TableViewUpdates/Introduction/Intro.html
樣本來自靜態數據，但您應該能夠更新它以使用來自數據庫的動態數據，並且還可以為日期等提供任務。
解決方案2
2 2013-08-09 01:51:11
JKExpandTableView是一個實現可擴展表視圖（UITableView的子類）的開源庫，應該可以幫到你： http ： //jackkwok.github.io/JKExpandTableView/
查看示例應用。
解決方案3
1 2013-05-04 05:14:28
我需要的東西現在正在工作，所以我要在這里發布代碼：
- (void)viewDidLoad
{
[super viewDidLoad];
BOOL flag = NO;
allDates = [[NSMutableArray alloc]init];
self.date = [[NSMutableArray alloc] init];
// self.date = [[NSMutableArray alloc]init];
self.listOfSections_DataSource = [[NSMutableArray alloc]init];
sqlite3_stmt *statement;
const char *dbpath = [mDatabasePath UTF8String];
if (sqlite3_open(dbpath,&mDiary)== SQLITE_OK) {
NSString *selectSQL = [NSString stringWithFormat:@"SELECT * FROM TODO"];
const char *query_stmt = [selectSQL UTF8String];
if (sqlite3_prepare_v2(mDiary,
query_stmt, -1, &statement, NULL) == SQLITE_OK)
{
while(sqlite3_step(statement) == SQLITE_ROW)
{
tempTaskName = [[NSString alloc]initWithUTF8String:(const char *) sqlite3_column_text(statement, 2)];
[allDates addObject:[[NSString alloc]initWithUTF8String:(const char *) sqlite3_column_text(statement, 0)]];
//[self.date addObject:tempTaskName];
}
}
sqlite3_finalize(statement);
}
NSLog(@"%i",[allDates count]);
sqlite3_close(mDiary);
self.date = [NSMutableArray arrayWithCapacity:[allDates count]];
for(int p = 0; p < [allDates count]; p++)
{
for(int q = p+1; q < [allDates count]; q++)
{
if([allDates[p] isEqualToString:allDates[q]])
{
flag = YES;
break;
}
}
if(flag)
{
//[self.date addObject:allDates[p]];
[allDates removeObjectAtIndex:p];
}
flag = NO;
}
// NSLog(@"%u",[self.date count]);
// [allDates setArray:self.date];
NSLog(@"allDates count%i",[allDates count]);
for(int x = 0;x < [allDates count];x++)
{
if (sqlite3_open(dbpath,&mDiary)== SQLITE_OK) {
NSString *selectSQL = [NSString stringWithFormat:@"SELECT * FROM TODO"];
const char *query_stmt = [selectSQL UTF8String];
if (sqlite3_prepare_v2(mDiary,
query_stmt, -1, &statement, NULL) == SQLITE_OK){
temp = [[NSMutableArray alloc]init];
while(sqlite3_step(statement) == SQLITE_ROW)
{
tempTaskName = [[NSString alloc]initWithUTF8String:(const char *) sqlite3_column_text(statement, 2)];
NSLog(@"%@",tempTaskName);
if([[[NSString alloc]initWithUTF8String:(const char *) sqlite3_column_text(statement, 0)] isEqualToString:allDates[x]])
{
[self.temp addObject:tempTaskName];
}
}
NSLog(@"task name%@",temp);
[listOfSections_DataSource addObject:temp];
} sqlite3_finalize(statement);
}
sqlite3_close(mDiary);
}
//[self.listOfSections_DataSource addObject:allDates];
NSMutableArray *emptyArray = [[NSMutableArray alloc]init];
listOfSections = [[NSMutableArray alloc]init];
for (int i = 0;i<[allDates count]; i++) {
[listOfSections addObject:emptyArray];
}
self.selectedSection = -1;
self.selectedSectionTail = -1;
}
表視圖方法：
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return [listOfSections_DataSource count];
}
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
if(selectedSection !=section)
return 1;
else{
NSArray *array = [listOfSections objectAtIndex:section];
return [array count];
}
}
- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section {
for(int y = 0;y<[allDates count]; y++)
{
if (section == y) {
return allDates[y];
}
}
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = @"cell";
if(self.selectedSection == indexPath.section){//this is just to check to see if this section is the one we touched
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil)
{
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
// cell.textLabel.text = [[listOfSections_DataSource objectAtIndex:indexPath.section] objectAtIndex:indexPath.row];
NSArray *myArray = [listOfSections_DataSource objectAtIndex:indexPath.section];//tasks
NSString* myString = [myArray objectAtIndex:indexPath.row]; // get task for that row, under the date
cell.textLabel.text = myString;
return cell;
}
else{//THIS IS going to happen the first time
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil)
{
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
cell.textLabel.text = @"more";
return cell;
}
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell * cell = [tableView cellForRowAtIndexPath:indexPath];
//check to see if the cell is for exapnding or for selection
if([cell.textLabel.text isEqualToString:@"more"]){ // this means we need to expand
listOfSections = [[NSMutableArray alloc]init];
//setting up the list of section with empty arrays
NSMutableArray *emptyArray = [[NSMutableArray alloc]init];
for (int i = 0;i<[allDates count]; i++) {
[listOfSections addObject:emptyArray];
}
//Add array of tasks here
[listOfSections replaceObjectAtIndex:indexPath.section withObject:[listOfSections_DataSource objectAtIndex:indexPath.section]];
int tapedRow = [indexPath section];
self.selectedSection = tapedRow;
NSMutableIndexSet *myIndexSet = [[NSMutableIndexSet alloc]init];
[myIndexSet addIndex:selectedSection];
[myIndexSet addIndex:selectedSectionTail];
// Updating section in the tableview
if(selectedSectionTail!=-1)
[taskTable reloadSections:(NSIndexSet*)myIndexSet withRowAnimation:UITableViewRowAnimationFade];
else {
[taskTable reloadSections:[NSIndexSet indexSetWithIndex:indexPath.section] withRowAnimation:
UITableViewRowAnimationFade];
}
//[taskTable reloadData];
}
else{
}
selectedSectionTail = selectedSection;
}
我知道必須有更好的方法來做到這一點，但這個解決方案對我有用，所以我決定發布它。
解決方案4
0 2018-07-30 10:54:22
在Swift 4中：
struct CellData {
var isOpened = Bool()
var title = String()
var sectionData = [String]()
}
class TableViewController: UITableViewController {
var tableViewData = [CellData]()
override func viewDidLoad() {
super.viewDidLoad()
// Uncomment the following line to preserve selection between presentations
// self.clearsSelectionOnViewWillAppear = false
// Uncomment the following line to display an Edit button in the navigation bar for this view controller.
// self.navigationItem.rightBarButtonItem = self.editButtonItem
tableViewData = [CellData(isOpened: false, title: "title1", sectionData: ["cell1","cell2","cell3"]),CellData(isOpened: false, title: "title2", sectionData: ["cell1","cell2","cell3"]),CellData(isOpened: false, title: "title3", sectionData: ["cell1","cell2","cell3"])]
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
// MARK: - Table view data source
override func numberOfSections(in tableView: UITableView) -> Int {
// #warning Incomplete implementation, return the number of sections
return tableViewData.count
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
// #warning Incomplete implementation, return the number of rows
if tableViewData[section].isOpened {
return tableViewData[section].sectionData.count + 1
}
return 1
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
if indexPath.row == 0 {
guard let cell = tableView.dequeueReusableCell(withIdentifier: "cell") else {
return UITableViewCell()
}
cell.textLabel?.text = tableViewData[indexPath.section].title
return cell
} else {
guard let cell = tableView.dequeueReusableCell(withIdentifier: "cell") else {
return UITableViewCell()
}
cell.textLabel?.text = tableViewData[indexPath.section].sectionData[indexPath.row - 1]
return cell
}
}
override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
if indexPath.row == 0 {
if tableViewData[indexPath.section].isOpened {
tableViewData[indexPath.section].isOpened = false
}else {
tableViewData[indexPath.section].isOpened = true
}
let sections = IndexSet(integer: indexPath.section)
tableView.reloadSections(sections, with: .none)
}
}
}
在ios中滾動的可擴展列表視圖
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