Having trouble with Multiple Selection in UITableview - ios

Question

I've been trying to selection of cell like
Same As Checkbox To select elements from object array
Here is my code. Please guide me.. Thanks in advance
#import <UIKit/UIKit.h>
#interface CheckAllListViewController : UIViewController <UITableViewDataSource,UITableViewDelegate>
{
IBOutlet UITableView *_myTable;
NSMutableArray *_myArray;
NSMutableArray *_selectedArray;
}
#property(nonatomic,retain) UITableView *myTable;
#property(nonatomic,retain)NSMutableArray *myArray;
#property(nonatomic,retain)NSMutableArray *selectedArray;
-(void)checkmarkAll;
-(void)UnChceckAll;
CheckAllListViewController.m
- (void)viewDidLoad
{
[super viewDidLoad];
_myArray=[[NSMutableArray alloc]initWithObjects:#"Check All",#"1",#"2",#"3",#"4",#"5",#"6",#"7",#"8",#"9",#"10" ,nil];
_selectedArray=[[NSMutableArray alloc]init];
// Do any additional setup after loading the view from its nib.
}
#pragma mark -UITableViewDelegates & Datasource
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
if (cell.accessoryType == UITableViewCellAccessoryNone)
{
cell.accessoryType = UITableViewCellAccessoryCheckmark;
[self.selectedArray addObject:[self.myArray objectAtIndex:indexPath.row]];
//if 'all' row is selected then check all rows
if([[self.myArray objectAtIndex:indexPath.row] isEqualToString:#"Check All"])
{
[self checkmarkAll];
}
}
else if (cell.accessoryType == UITableViewCellAccessoryCheckmark)
{
cell.accessoryType = UITableViewCellAccessoryNone;
[self.selectedArray removeObject:[self.myArray objectAtIndex:indexPath.row]];
if([[self.myArray objectAtIndex:indexPath.row] isEqualToString:#"Check All"])
{
[self UnChceckAll];
[self.selectedArray removeAllObjects];
}
else if([self.selectedArray containsObject:#"Check All"])
{
[self checkmarkAll];
[self.selectedArray removeAllObjects];
cell.accessoryType = UITableViewCellAccessoryNone;
[self.selectedArray addObject:[self.myArray objectAtIndex:indexPath.row]];
}
}
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [_myTable dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil)
{
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
if([self.selectedArray count])
{
if([self.selectedArray containsObject:[self.myArray objectAtIndex:indexPath.row]] || [self.selectedArray containsObject:#"Check All"])
{
cell.accessoryType = UITableViewCellAccessoryCheckmark;
}
else
{
cell.accessoryType = UITableViewCellAccessoryNone;
}
}
cell.textLabel.text=[_myArray objectAtIndex:indexPath.row];
// [self configureCell:cell atIndexPath:indexPath];
return cell;
}
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return _myArray.count;
}
-(void)checkmarkAll
{
for (int i=0;i<[self.myArray count] ; i++)
{
NSIndexPath *myIdx=[NSIndexPath indexPathForRow:i inSection:0];
UITableViewCell *cell=[self.myTable cellForRowAtIndexPath:myIdx];
cell.accessoryType=UITableViewCellAccessoryCheckmark;
}
}
-(void)UnChceckAll
{
for(int i=0;i<[self.myArray count];i++)
{
NSIndexPath *myIndexPath = [NSIndexPath indexPathForRow:i inSection:0];
UITableViewCell *cell = [self.myTable cellForRowAtIndexPath:myIndexPath];
cell.accessoryType = UITableViewCellAccessoryNone;
}
}
I've used this tutorial -http://iphonediscoveries.blogspot.in/2013/10/creating-inclusive-list-in-uitableview.html
I want to achieve :
1 Add an option for the user to be able to select all rows when ‘all’ is selected.
2 When the ‘all’ is checked I want all rows checkmarked, and all checkmarks removed when 'all' is unchecked.
3 When ‘all’ is checked, and all rows are checkmarked, if at that time a row is clicked, then check marks in all other rows should be removed (including ‘all’) and only that row should contain the checkmark.
4 Should not forget Selection After calling and scrolling UITableview
UPDATE
-My Following code gives me check all functionality & Uncheck All Functionality .
Lets say I've chosen all row by selecting check all now,If I'd choose any row randomly Should remove tick from current selected element & as well should remove tick from first element i.e #"Check All"
-same for uncheck functionality

Answer 1

Not sure if I get what the problem is, but I would change the checkAll and uncheckAll methods to change the selectedArray and reload the tableview:
-(void)checkmarkAll
{
self.selectedArray = [NSMutableArray arrayWithArray:self.myArray];
[self.tableView reloadData];
}