CODEWITHSUNDEEP
iosiphoneuitableviewuigesturerecognizeruialertview
Bittoo
Bittoo

Reputation: 579

How to find the indexpath on alertview?

Hi i am working with the tableview.Now i am facing one issue. in my tableview when i use Long Gesture i need to display Alert View.it is working fine.when i click on buttonindex 0 in alert view i need to perform some Task.But in that i need indexpath. Below is my method for perform task

UILongPressGestureRecognizer *lpgr = [[UILongPressGestureRecognizer alloc]
                                      initWithTarget:self action:@selector(messageDeleteOrForword:)];
lpgr.minimumPressDuration = 2.0; //seconds
lpgr.delegate = self;
[self.tableView addGestureRecognizer:lpgr];

}
- (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex {

if (buttonIndex == 0) {
  [self deleteSpecificMessage];

}
if (buttonIndex==1) {

}
}

 -(void)messageDeleteOrForword:(UILongPressGestureRecognizer *)gestureRecognizer
 {
   UIAlertView *alert=[[UIAlertView alloc] initWithTitle:@"Delete" message:@"Do you want to delete specific message" delegate:self cancelButtonTitle:@"Delete" otherButtonTitles:@"Forword", nil];
[alert show];
}


-(void)deleteSpecificMessage
{

 CGPoint p = [gestureRecognizer locationInView:self.tableView];
  NSIndexPath *indexPath = [self.tableView indexPathForRowAtPoint:p];
}

but i need to pass some parameter to know the indexpath for that i use below line -(void)deleteSpecificMessage:(id)sender { } But how to call and assign parameter in alertview Please help me.

Upvotes: 1

Views: 272

Answers (5)

Vatsal K
Vatsal K

Reputation: 1051

You can get indexpath using 

NSIndexPath *selectedIndexPath = [tableView indexPathForSelectedRow];

You can check more details from this link

Also you can take a IndexPath variable in .h file which can be assigned while selecting the tableview cell.

First of all Add your long tap gesture recognizer. 

UILongPressGestureRecognizer *longPressGesture = [[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(actionLongPressGeature:)];
[longPressGesture setDelegate:self];
[longPressGesture setMinimumPressDuration:0.3];
[tableView addGestureRecognizer:longPressGesture];

i.e Option 1

-(void)actionLongPressGeature:(UILongPressGestureRecognizer *)gestureRecognizer
{
    CGPoint p = [gestureRecognizer locationInView:tableViewJobs];
   // You need to declare NSIndexPath *indexPathSelected in your .h File
    indexPath = [tableView indexPathForRowAtPoint:p];
    if (indexPath == nil) {
        NSLog(@"long press on table view but not on a row");
    }
    else if (gestureRecognizer.state == UIGestureRecognizerStateBegan)
    {
            // Perform your action i.e AlertView
    }
}

Option 2:

-(void)actionLongPressGeature:(UILongPressGestureRecognizer *)gestureRecognizer
{
        // You need to declare NSIndexPath *indexPathSelected in your .h File
    indexPath = [tableView indexPathForSelectedRow];
    if (indexPath == nil) {
        NSLog(@"long press on table view but not on a row");
    }
    else if (gestureRecognizer.state == UIGestureRecognizerStateBegan)
    {
        // Perform your action i.e AlertView
    }
}

and later on you can use this variable.

I hope this is you what you are looking for.

Upvotes: 0

Jayesh Thanki
Jayesh Thanki

Reputation: 2077

You can also use Objective-C Associated Objects for runtime properties. This features is available in <objc/runtime.h>. For Example:

#import <objc/runtime.h>

-(void)messageDeleteOrForword:(UILongPressGestureRecognizer *)gestureRecognizer
{
   UIAlertView *alert=[[UIAlertView alloc] initWithTitle:@"Delete" message:@"Do you want to delete specific message" delegate:self cancelButtonTitle:@"Delete" otherButtonTitles:@"Forword", nil];
   objc_setAssociatedObject(alert, @"currentIndexPath", indexPath, OBJC_ASSOCIATION_RETAIN);
   [alert show];
}


- (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex 
{
   NSIndexPath *idxPath = objc_getAssociatedObject(alertView, @"currentIndexPath");
   NSLog(@"%@",idxPath);

   if (buttonIndex == 0) {
      [self deleteSpecificMessage];
   }

   if (buttonIndex==1) {
   }
}

Here are some links which is more helpful. http://kingscocoa.com/tutorials/associated-objects/ http://nshipster.com/associated-objects/

Using associate object you can attached multiple properties with any object and get easily. In first link you can also customize properties with defining Category.

Upvotes: 0

ash999
ash999

Reputation: 106

-(void)messageDeleteOrForword:(UILongPressGestureRecognizer *)gestureRecognizer
 {   
     CGPoint p = [gestureRecognizer locationInView:self.myTableView];

     NSIndexPath *indexPath = [self.myTableView indexPathForRowAtPoint:p];
     if (indexPath == nil) {
        NSLog(@"long press on table view but not on a row");
     }
     else{

        NSLog(@"selected row index %ld",(long)indexPath.row);

        UIAlertView *alert=[[UIAlertView alloc] initWithTitle:@"Delete" message:@"Do you want to delete specific message" delegate:self cancelButtonTitle:@"Delete" otherButtonTitles:@"Forword", nil];
        [alert show];
     } 


 }

Upvotes: 0

Ketan Parmar
Ketan Parmar

Reputation: 27448

show alert view from didselectrowatindexpath. set alertview tag as indexpath from this method. by that way you will integrate your alertview with indexpath. in alertview delegate you can got indexpath as it's tag. so you can use this tag to delete it or forward it as considering indexpath.

forexample :

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {

  UIAlertView *alert=[[UIAlertView alloc] initWithTitle:@"Delete" message:@"Do you want to delete specific message" delegate:self cancelButtonTitle:@"Delete" otherButtonTitles:@"Forword", nil];

 alert.tag = indexPath;  //setting tag

 [alert show];
}

Update (as ask in comment):

you can do something like this, here is an example,

UILongPressGestureRecognizer *lpgr = [[UILongPressGestureRecognizer alloc]
                                      initWithTarget:self action:@selector(handleLongPress:)];
lpgr.minimumPressDuration = 2.0; //seconds
lpgr.delegate = self;
[self.myTableView addGestureRecognizer:lpgr];

here handleLongpress method

 -(void)handleLongPress:(UILongPressGestureRecognizer *)gestureRecognizer
{
 CGPoint p = [gestureRecognizer locationInView:self.myTableView];

NSIndexPath *indexPath = [self.myTableView indexPathForRowAtPoint:p];
if (indexPath == nil) {
    NSLog(@"long press on table view but not on a row");
}
else{

    UIAlertView *alert=[[UIAlertView alloc] initWithTitle:@"Delete" message:@"Do you want to delete specific message" delegate:self cancelButtonTitle:@"Delete" otherButtonTitles:@"Forword", nil];

    alert.tag = indexPath;  //setting tag

    [alert show];
}

}

hope this will help :)

Upvotes: 1

Manolis Karamanis
Manolis Karamanis

Reputation: 788

In your delete method you could add this:

CGPoint location = [gestureRecognizer locationInView:self.tableView];
NSIndexPath *indexPath = [self.tableView indexPathForRowAtPoint:location];
UITableViewCell* cell = [self.tableView cellForRowAtIndexPath:indexPath];

Upvotes: 0

Related Questions