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我需要在iOS應用中創建可擴展列表視圖，即。如果你點擊一個單元格，它應該擴大以提供更多的單元格。我正在關注此鏈接中給出的示例：Toggle showing/hiding child table cells iOS 此處給出了實現文件的代碼：http://pastie.org/7756763iOS中的可擴展列表視圖
但是，在上面的示例中，數組是固定的。我有一個sqlite數據庫，用於存儲任務和其開始日期等。我需要創建一個可展開的視圖，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。下面的代碼：
- (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;
}
表視圖的方法是：
- (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;
}
這裏的問題就在於： 1段號，顯示在屏幕上是正確的，但在第一個單元被竊聽，它消失了。 2.當任何單元被點擊時，列表不會被展開。
請任何人都可以幫我嗎？謝謝..
感謝..但我已經通過這個走了..它從一個plist中舉人的數據，而不是從一個陣列 – 2013-05-03 09:17:08
@ Crazed'n'Dazed使用的.plist你有NSDictionary中加載它，並且我想NSDictionary在提供的例子中有一些NSArray。您應該再次檢查它 – 2013-05-03 09:48:39
您也可以修改樣本以從Array讀取而不是plist。 – canhazbits 2013-05-03 17:07:14