UITapGestureRecognizer in custom UITableViewCell within UIPicker is not working - ios

Question

I am trying to implement multiselect option in UIPicker using setAccessoryType in UITableViewCell and following #Suda's blog
Now the Problem is : Not getting any error but UITapGestureRecognizer is not getting recognized.
toggleSelection: is not getting called (not able to add / remove object in selectedItems).
I have searched for this problem in SO but didn't get any solution. nothing is working for me.
I have used following code
ViewController.h
#import <UIKit/UIKit.h>
#interface ViewController : UIViewController<UIPickerViewDelegate, UIPickerViewDataSource>
{
NSMutableArray *selectedItems;
NSArray *datasource;
}
#property (weak, nonatomic) IBOutlet UIPickerView *pickerView;
#end
ViewController.m
- (void)viewDidLoad {
[super viewDidLoad];
datasource = [[NSArray alloc] initWithObjects:#"A", #"B", #"C", #"D", #"E", nil];
self.pickerView.delegate = self;
self.pickerView.dataSource = self;
selectedItems = [[NSMutableArray alloc] init];
}
-(NSInteger) numberOfComponentsInPickerView:(UIPickerView *)pickerView {
return 1;
}
-(NSInteger) pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component {
return datasource.count;
}
-(NSString*) pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component {
return datasource[row];
}
- (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view {
UITableViewCell *cell = (UITableViewCell *)view;
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:nil];
[cell setBackgroundColor:[UIColor clearColor]];
[cell setBounds:CGRectMake(0, 0, cell.frame.size.width - 20, 44)];
cell.tag = row;
UITapGestureRecognizer * singleTapGestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(toggleSelection:)];
singleTapGestureRecognizer.numberOfTapsRequired = 1;
[cell setUserInteractionEnabled:YES];
[cell addGestureRecognizer:singleTapGestureRecognizer];
// Also tried with [cell.contentView addGestureRecognizer:singleTapGestureRecognizer];
}
if ([selectedItems indexOfObject:[NSNumber numberWithInt:row]] != NSNotFound) {
[cell setAccessoryType:UITableViewCellAccessoryCheckmark];
} else {
[cell setAccessoryType:UITableViewCellAccessoryNone];
}
cell.textLabel.text = [datasource objectAtIndex:row];
return cell;
}
- (void)toggleSelection:(UITapGestureRecognizer *)recognizer {
NSNumber *row = [NSNumber numberWithInt:recognizer.view.tag];
NSUInteger index = [selectedItems indexOfObject:row];
if (index != NSNotFound) {
[selectedItems removeObjectAtIndex:index];
[(UITableViewCell *)(recognizer.view) setAccessoryType:UITableViewCellAccessoryNone];
} else {
[selectedItems addObject:row];
[(UITableViewCell *)(recognizer.view) setAccessoryType:UITableViewCellAccessoryCheckmark];
}
}
Any help would be appreciable.