我需要在我的 iOS 应用程序中创建可扩展的列表视图，即。如果您点击一个单元格，它应该会扩展以提供更多单元格。我正在关注此链接上给出的示例：切换显示/隐藏子表格单元 iOS 实现文件的代码也在这里给出：http: //pastie.org/7756763
但是，在上面的示例中，数组是固定的。我有一个 sqlite 数据库，我在其中存储任务及其开始日期等。我需要创建一个可展开的视图，其中不同的行是不同的开始日期，当我点击一个日期时，它应该给出该日期的任务。这是代码：
- (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;
}
表格视图方法是：
- (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;
}
这里的问题是： 1. 屏幕上显示的部分数量是正确的，但是当第一个单元格被点击时，它会消失。2.点击任何单元格时列表不会展开。
请问有人可以帮我吗？谢谢..
