How to push a view from custom UITableViewCell with button action (with parameters)

Question

I added a button on the custom cell. It pushes a view. I created property for button on CustomTableViewCell.h

@property (weak, nonatomic) IBOutlet UIButton *selectedMapButton;

I want to use selectedMapButton for push a view on TableViewController.m I tried this code, but something is not right.

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    NSString *cord = cellSight[@"S_Coodinates"];

    [cell.selectedMapButton addTarget:self action:@selector(sightMapButton:cord) forControlEvents:UIControlEventTouchUpInside];

    //When I call sightMapButton method. It gives an error

    return cell;
}

- (void)sightMapButton: (NSString *)withCoordinates
{
    TOCGSightseeingMapKitViewController *mapKitController = [[TOCGSightseeingMapKitViewController alloc] init];
    mapKitController.sightCoordinates = withCoordinates;

    [self.navigationController pushViewController:mapKitController animated:YES];
}

How can I solve it? Thanks.

do you want to call method from perticular button of perticular cell.? — Ashish Ramani, Apr 16 '14 at 08:33

serdaryillar · Answer 1 · 2014-04-16T11:49:16.373

Alternate way with delegate/protocol (my best way);

- Create a "CustomCellDelegate" class. (base class is NSObject)
- Open CustomCellDelegate.h and add this code;

@protocol CustomCellDelegate <NSObject>
   - (void) uiTapButtonWithParameter:(NSString *)parameter;    
@end

- Close CustomCellDelegate.h
- Open CustomCell.h and add this code;

#import "CustomCellDelegate"

@interface CustomCell : UITableViewCell
@property (nonatomic) id <CustomCellDelegate> delegate;

- Close CustomCell.h
- Open CustomCell.m and add code inside to UIButton action method;

[_delegate uiTapButtonWithParameter:@"hello world!"];

- Close CustomCell.m
- Open CustomViewController.h and add this code;

@interface CustomViewController : UIViewController <UITableViewDelegate,   UITableViewDataSource, CategoryItemsCellDelegate>

- Close CustomViewController.h and open CustomViewController.m
- Add this code;

- ( NSInteger )tableView:( UITableView * )tableView numberOfRowsInSection:( NSInteger    )section; {
    return 20;
}

- ( UITableViewCell * )tableView:( UITableView * )tableView cellForRowAtIndexPath:( NSIndexPath * )indexPath; {

  CategoryItemsCell *cell = [tableView dequeueReusableCellWithIdentifier:@"CustomCell"];

  cell.delegate = self;

  return cell;
}

- (void) uiTapButtonWithParameter:(NSString *)parameter{
     NSLog(@"%@",parameter)
 }

Mert kardeşim delegate ve protocol en doğru çözüm olacaktır ;)

score 1 · Accepted Answer · edited May 23 '17 at 12:01

You cannot specify your own parameters to button action handler. Its variant with 1 parameter will accept "sender", that is button that triggered the action. Your workflow should be following:

Find indexPath of cell where button was clicked
Get cellSight object corresponding to that indexPath
Fill your controller with info from cellSite object.

(somewhat pseudo-)Code may look like, assuming you have array of SiteObjects:

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    cell = ...  // create/init cell somehow

    [cell.selectedMapButton addTarget:self action:@selector(sightMapButton:) forControlEvents:UIControlEventTouchUpInside];

    return cell;
}

- (void)sightMapButton: (UIButton *)sender
{
    NSIndexPath *indexPath = ... // Find indexPath of button
    SiteObject cellSight = sitesArray[indexPath.row];
    TOCGSightseeingMapKitViewController *mapKitController = [[TOCGSightseeingMapKitViewController alloc] init];
    mapKitController.sightCoordinates = cellSight[@"S_Coodinates"];

    [self.navigationController pushViewController:mapKitController animated:YES];
}

How to find indexPath of cell containing button you can find for example in my other answer

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { cell.selectedMapButton.tag = indexPath.row; [cell.selectedMapButton addTarget:self action:@selector(sightMapButton:) forControlEvents:UIControlEventTouchUpInside]; } - (void)sightMapButton:(UIButton *)sender { TOCGSightseeingMapKitViewController *mapKitController = [[TOCGSightseeingMapKitViewController alloc] init]; mapKitController.sightCoordinate = self.sights[sender.tag][@"S_Coordinates"]; [self.navigationController pushViewController:mapKitController animated:YES]; } — Mert Karabulut, Apr 16 '14 at 09:21

Bharat · Answer 3 · 2014-04-16T08:45:30.737

1

in your custom cell class add action for button and define a protocol(Delegate) invoke the delegate method from button action. in cellForRowAtIndexPath set the delegate of your cell to self and implement the delegate method. let me know if you've any query.

edited Apr 16 '14 at 08:45

answered Apr 16 '14 at 08:39

Bharat

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score 0 · Answer 4 · answered Apr 16 '14 at 08:45

I suppose the problem is in @selector(sightMapButton:cord) which is used to retrieve method's address. Most likely you are not allowed to pass arguments here.

As an alternative to finding the indexPath of cell where button was clicked: You can subclass UIButton and add required information to it as a property. Then you can go the way Vladimir suggested, and get your cord from sender after casting it to your Button class.

score 0 · Answer 5 · answered Apr 16 '14 at 09:24

Vladimir's answer works correctly and I tried this.

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    cell.selectedMapButton.tag = indexPath.row;

    [cell.selectedMapButton addTarget:self action:@selector(sightMapButton:) forControlEvents:UIControlEventTouchUpInside];
}

- (void)sightMapButton:(UIButton *)sender
{
    TOCGSightseeingMapKitViewController *mapKitController = [[TOCGSightseeingMapKitViewController alloc] init];
    mapKitController.sightCoordinate = self.sights[sender.tag][@"S_Coordinates"];
    [self.navigationController pushViewController:mapKitController animated:YES];
}

It is also works.

score 0 · Answer 6 · answered Apr 16 '14 at 20:48

We can use blocks to get cellIndexPath .
Instead of using CellDelegate to call button actions Blocks will be the better option .

@interface WACustomCell : UITableViewCell

@property(readwrite,copy)void (^cellCallBackMethod)(NSInteger rowIndexPath);

-(IBAction)buttonTappedFromCell:(id)sender;

@end

 @implementation WACustomCell

 @synthesize cellCallBackMethod;


     -(IBAction)buttonTappedFromCell:(id)sender{

 self.cellCallBackMethod(0);

 //any value can be given as we will retrive this value from CellForRowAtIndex method


 }

In View Controller

-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{


cel = ....
cell.cellCallBackMethod = ^(NSInteger cellIndex){

    [self cellButtonTappedFromCellWithIndex:cellIndex];
};

return cell;
}
-(void)cellButtonTappedFromCellWithIndex:(NSInteger )cellIndex{


SiteObject cellSight = sitesArray[cellIndex];
TOCGSightseeingMapKitViewController *mapKitController = [[TOCGSightseeingMapKitViewController alloc] init];
mapKitController.sightCoordinates = cellSight[@"S_Coodinates"];

    [self.navigationController pushViewController:mapKitController animated:YES];

}

score -1 · Answer 7 · answered Apr 16 '14 at 08:32

-1

You should add the method in Custom table view cell.

answered Apr 16 '14 at 08:32

yoshiiiiiiii

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20

but it must to take coordinates from TableviewController – Mert Karabulut Apr 16 '14 at 08:34

How to push a view from custom UITableViewCell with button action (with parameters)

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