Row Order in UITableViewCell is wrong - objective-c

Question

This is a simple class that extended UITableViewController, there's only one section total 5 rows. but when launch app, only show 2 record, when pressed the button, it will show more records with text field.
but, press simple button and press detail button , i found the order in table is wrong.
I don't know what happen, so can help me to solve this problem?
Many thanks
- (void)viewDidLoad
{
[super viewDidLoad];
tempSimpleAry = [#[#"simple1",#"simple2"] mutableCopy];
tempDetailAry = [#[#"detail A",#"detail B",#"detail C"] mutableCopy];
dataAry = [[NSMutableArray alloc]init];
[dataAry addObjectsFromArray:tempSimpleAry];
isExpanded = NO;
}
-(void)dealloc{
[super dealloc];
tempSimpleAry = nil;
tempDetailAry = nil;
dataAry = nil;
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
}
- (BOOL)textFieldShouldReturn:(UITextField *)aTextField {
[aTextField resignFirstResponder];
return YES;
}
#pragma mark - Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return dataAry.count+1;
}
static NSString *BasicCellIdentifier = #"BasicCell";
static NSString *MyCellIdentifier = #"MyCell";
static NSString *LastCellIdentifier = #"LastCell";
UITableViewCell *Lastcell = nil;
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
int row = indexPath.row;
if(indexPath.row<tempSimpleAry.count){
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:BasicCellIdentifier forIndexPath:indexPath];
cell.textLabel.text = [[NSString alloc]initWithFormat:#"%# %d", [dataAry objectAtIndex:row], row];
return cell;
}else if(indexPath.row < dataAry.count){
MyTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:MyCellIdentifier forIndexPath:indexPath];
cell.myTitleLabel.text = [[NSString alloc]initWithFormat:#"%# %d", [dataAry objectAtIndex:row], row];
cell.myTextField.placeholder = [[NSString alloc]initWithFormat:#"%# %d", [dataAry objectAtIndex:row], row];
NSLog(#"MyTableViewCell - myTitlelabel = %#, mytextfield tag = %d, text = %#", cell.myTitleLabel.text, cell.myTextField.tag,cell.myTextField.text);
cell.myTextField.tag =100+indexPath.row;
return cell;
}else{
Lastcell = [tableView dequeueReusableCellWithIdentifier:#"LastCell" forIndexPath:indexPath];
Lastcell.textLabel.text = #"Detail";
return Lastcell;
}
}
#pragma mark - Table view delegate
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
[currentEditingTextField resignFirstResponder];
NSMutableArray *tmpAry = [[NSMutableArray alloc]init];
if(indexPath.row == dataAry.count){
if(isExpanded){
int idx = dataAry.count-1;
for(int i=0; i<tempDetailAry.count;i++){
NSIndexPath *idxPaths = [NSIndexPath indexPathForRow:idx-i inSection:0] ;
[tmpAry addObject:idxPaths];
[dataAry removeLastObject];
}
[tableView deleteRowsAtIndexPaths:tmpAry withRowAnimation:UITableViewRowAnimationFade];
}else{
int idx = tempSimpleAry.count;
for(int i=0; i<tempDetailAry.count;i++){
NSIndexPath *idxPaths = [NSIndexPath indexPathForRow:idx+i inSection:0] ;
[tmpAry addObject:idxPaths];
[dataAry insertObject:[tempDetailAry objectAtIndex:i] atIndex:idx+i];
}
[tableView insertRowsAtIndexPaths:tmpAry withRowAnimation:UITableViewRowAnimationFade];
}
[self.tableView beginUpdates];
[self.tableView endUpdates];
isExpanded = !isExpanded;
if(!isExpanded)
Lastcell.textLabel.text = #"Detail";
else
Lastcell.textLabel.text = #"Simple";
}
}

Answer 1

It is because the cells are cached with cellIdentifier.
When you press Simple, you delete cells by the sequence, 'detail C 4', 'detail B 3', 'detail A 2'. So the 'detail C 4' cell is pushed into the cache queue first, then 'detail B 3' cell, finally 'detail C 2' cell.
Then you press Detail, the tableView query the cache queue one by one. Because the 'detail C 4' cell is at the front, it is popped first. So u use the cell with 'aa' in the textField, and then you set the cell.myTitleLabel.text and cell.myTextField.placeholder, but you don't set the cell.myTextField.text, which is 'aa'. Finally, the cell became 'detail A 2' with text 'aa' in the textField.
The same with the other two cells.
Is the above clear for you ?

Answer 2

It seems that u are only changing the textfield's place holder not its text, You should also save the textfield's text into an array and set it in cellForRowAtIndexPath!