I had my app working fine on iOS 6. With the upgrade I stopped being able to delete rows from my UITableView
.
I've a button in my prototype cell.
Here is the button's function:
- (IBAction)deleteCell:(id)sender {
UIButton *btn = (UIButton*) sender;
UITableViewCell *cell = (UITableViewCell*) btn.superview.superview;
NSIndexPath *indexPath = [_tableView indexPathForCell:cell];
if([names count] > 9) {
int index = indexPath.row;
[names removeObjectAtIndex:index];
[photos removeObjectAtIndex:index];
[_tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationRight];
}
}
The problem is my index variable is always 0.
I tried another solution:
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
if (editingStyle == UITableViewCellEditingStyleDelete) {
int index = indexPath.row;
[names removeObjectAtIndex:index];
[photos removeObjectAtIndex:index];
[_tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationRight];
}
}
This solution doesn't work either. Nothing happens when I swipe right.
So, to remove a cell from a table view you first remove it from your data source, then you call deleteRows(at:) on your table view, providing it with an array of index paths that should be zapped. You can create index paths yourself, you just need a section and row number.
1. The collection view is much more robust in terms of layout features and other things like animations. Tableiw is a simple list, which displays single-dimensional rows of data. It's smooth because of cell reuse and other magic.
Try this sample tutorial,
ViewController.h
#import <UIKit/UIKit.h>
@interface ViewController : UIViewController<UITableViewDelegate,UITableViewDataSource>
{
NSMutableArray *arryData1;
NSMutableArray *arryData2;
IBOutlet UITableView *tableList;
}
@end
ViewController.m
#import "ViewController.h"
@interface ViewController ()
@end
@implementation ViewController
-(void)viewDidLoad
{
[super viewDidLoad];
arryData1 = [[NSMutableArray alloc] initWithObjects:@"MCA",@"MBA",@"BTech",@"MTech",nil];
arryData2 = [[NSMutableArray alloc] initWithObjects:@"Objective C",@"C++",@"C#",@".net",nil];
tableList.editing=YES;
}
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [arryData1 count];
}
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier= @"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil)
{
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleValue1 reuseIdentifier:CellIdentifier] ;
}
cell.textLabel.text = [arryData1 objectAtIndex:indexPath.row];
cell.detailTextLabel.text = [arryData2 objectAtIndex:indexPath.row];
return cell;
}
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
if (editingStyle == UITableViewCellEditingStyleDelete) {
int index = indexPath.row;
[arryData1 removeObjectAtIndex:index];
[arryData2 removeObjectAtIndex:index];
[tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath]
withRowAnimation:UITableViewRowAnimationFade];
}
}
- (UITableViewCellEditingStyle)tableView:(UITableView *)aTableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath
{
if (tableList.editing)
{
return UITableViewCellEditingStyleDelete;
}
return UITableViewCellEditingStyleNone;
}
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath
{
return YES;
}
I quess the problem is you're not reloading data again thus it's staying in cache memory
You can try to reload data with [tableView reloadData];
this method to the below of
[_tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationRight];
this code line in your second solution.
To show delete button on cell swipe you must implement this delegate method.
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath {
// Return YES if you want the specified item to be editable.
return YES;
}
Try this, i hope this will work for you.
Use the tableview commiteditingstyle method to delete a cell/row of the tableviewcontroller.
Here is the workable code snip:
-(void) tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
[ArrayHoldsCellObj removeObjectAtIndex:indexPath.row];
[tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationAutomatic];
}
Note that the ArrayHoldsCellObj
is the Array object you must declare and assign each cell to the area index.
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