swipe to delete option breaking the tableviewcell functionality - ios

Question

So I have been creating a tableviewcontroller that handles my tableview and its tableviewcells..
Here's the code––
ItemsViewController.h
#import <UIKit/UIKit.h>
#import "DetailViewController.h"
#interface ItemsViewController : UITableViewController <UITableViewDataSource, UITableViewDelegate>
-(IBAction)addNewItem:(id)sender;
#end
ItemsViewController.m
#implementation ItemsViewController
-(id) init{
self= [super initWithStyle:UITableViewStyleGrouped];
if (self) {
UINavigationItem *n= [self navigationItem];
[n setTitle:#"Homepwner"];
for (int i=0; i<5; i++) {
[[BNRItemStore sharedStore] createItem];
}
}
return self;
}
- (id)initWithStyle:(UITableViewStyle)style
{
return [self init];
}
- (void)viewDidLoad
{
NSLog(#"ItemsView loaded");
[super viewDidLoad];
UIBarButtonItem *bbi= [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:#selector(addNewItem:)];//Target-Action pair..
self.navigationItem.rightBarButtonItem= bbi;
// Uncomment the following line to preserve selection between presentations.
// self.clearsSelectionOnViewWillAppear = NO;
// Uncomment the following line to display an Edit button in the navigation bar for this view controller.
self.navigationItem.leftBarButtonItem = self.editButtonItem;
}
-(void)viewWillAppear:(BOOL)animated{
NSLog(#"ItemsView appearing");
[super viewWillAppear:animated];
[[self tableView] reloadData];
}
-(IBAction)addNewItem:(id)sender{
BNRItem *newItem= [[BNRItemStore sharedStore] createItem];
NSLog(#"%d",[[[BNRItemStore sharedStore] allItems] count]);
int newRow = [[[BNRItemStore sharedStore] allItems] indexOfObject:newItem];
NSIndexPath *ip= [NSIndexPath indexPathForRow:newRow inSection:0];
[self.tableView insertRowsAtIndexPaths:[NSArray arrayWithObject:ip] withRowAnimation:UITableViewRowAnimationTop];
}
//Row Selection
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
if(indexPath.row<[[BNRItemStore sharedStore] allItems].count){
NSLog(#"Row# %d selected",indexPath.row);
DetailViewController *detailViewController= [[DetailViewController alloc] init];
NSArray *items= [[BNRItemStore sharedStore] allItems];
BNRItem *item= [items objectAtIndex:indexPath.row];
detailViewController.item=item;//BNRItem at the selected indexPath.
//Push it onto the top of the navigation controller's stack
[[self navigationController] pushViewController:detailViewController animated:YES];
}
else{
return;
}
}
#pragma mark - Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
NSLog(#"Test1");
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
//#warning Incomplete method implementation.
// Return the number of rows in the section.
NSLog(#"Current section- %d",section);
return [[[BNRItemStore sharedStore] allItems] count]+1 ;//no. of rows (5)+'No more items' row
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
NSLog(#"hello");
// NSLog(#"%#",headerView);
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
// Configure the cell...
if (!cell) {
cell= [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
if (indexPath.row<[[BNRItemStore sharedStore] allItems].count) {
[[cell textLabel] setText:[[[[BNRItemStore sharedStore] allItems] objectAt Index:indexPath.row] description]];
}
else if (indexPath.row== [[BNRItemStore sharedStore] allItems].count)
{
[[cell textLabel] setText:#"No more items"];
}
return cell;
}
// Override to support conditional editing of the table view.
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath
{
// Return NO if you do not want the specified item to be editable.
if (self.editing) {
NSLog(#"Editing is on");
self.navigationItem.rightBarButtonItem.enabled=NO;
if (indexPath.row==[[BNRItemStore sharedStore] allItems].count) {
[tableView cellForRowAtIndexPath:indexPath].hidden=YES;
return NO;// Do not make 'No more items' editable.
}
}
else{//When the user is out of editing mode
NSLog(#"editing done");
[self.tableView cellForRowAtIndexPath:indexPath].hidden=NO;
self.navigationItem.rightBarButtonItem.enabled=YES;
}
return YES;
}
// Override to support editing the table view.
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
NSLog(#"%#",NSStringFromSelector(_cmd));
if (editingStyle == UITableViewCellEditingStyleDelete) {
NSLog(#"Deletion is on");
// Delete the row from the data source
NSArray *items= [[BNRItemStore sharedStore] allItems];
BNRItem *p= [items objectAtIndex:[indexPath row]];
[[BNRItemStore sharedStore] removeItem:p];
[tableView deleteRowsAtIndexPaths:#[indexPath] withRowAnimation:UITableViewRowAnimationFade];
}
else if (editingStyle == UITableViewCellEditingStyleInsert) {
// Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view
}
}
// Override to support rearranging the table view.
- (void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)fromIndexPath toIndexPath:(NSIndexPath *)toIndexPath
{
[[BNRItemStore sharedStore] moveItemAtIndex:fromIndexPath.row toIndex:toIndexPath.row];
}
-(NSIndexPath *)tableView:(UITableView *)tableView targetIndexPathForMoveFromRowAtIndexPath:(NSIndexPath *)sourceIndexPath toProposedIndexPath:(NSIndexPath *)proposedIndexPath{
if (proposedIndexPath.row==[[BNRItemStore sharedStore] allItems].count) {// 'No more items' row
return [NSIndexPath indexPathForRow:proposedIndexPath.row-1 inSection:0];
}
return proposedIndexPath;
}
#end
When the editing mode is on i.e when i tap Edit button on the NavBar the Add button grays out and the 'No more items' rows becomes hidden. After exiting Edit mode (by tapping 'Done' button) the Add button becomes selectable and the 'No more items' row unhides.. This is all fine when i perform editing by first entering the Edit mode and then exiting the Edit mode. But when instead of using the above way, i use swipe to delete feature, the view doesn't realize the above functionality (i.e. Ungraying/Re-enabling the Add button once i'm done doing a deletion using the swipe to delete thing. When i swipe across a cell (so as to bring up the delete button on the right side of the cell and graying out the Add button in the process) and choose not to press the 'Delete' button by just retapping on the cell (so that the Delete button goes away) the Add button does not update itself so as to get enabled.. What to do about. Pls carefully examine my code first and give recommendations accordingly..

Answer 1

use this tableView Delegate mathod
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath
{
// Return NO if you do not want the specified item to be editable.
return YES;
}
- (UITableViewCellEditingStyle)tableView:(UITableView *)tableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath
{
return UITableViewCellEditingStyleDelete;
}
- (BOOL)tableView:(UITableView *)tableView shouldIndentWhileEditingRowAtIndexPath:(NSIndexPath *)indexPath
{
return NO;
}
Please Utilize the Apple Library- UItableView