ios - UITapGestureRecognizer が UIButton で動作しない

Question

UITapGestureRecognizer *PressRecognizer1 = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handlePress:)];
        [PressRecognizer1 setNumberOfTouchesRequired:1];
         [firstBtn addGestureRecognizer:PressRecognizer1];

-(void)handlePress:(UITapGestureRecognizer*)PressRecognizer {

    NSLog(@"working");
      if (PressRecognizer.state == UIGestureRecognizerStateBegan) {
          UIButton *whichButton=(UIButton *)[PressRecognizer view];
          NSLog(@"whichButton %d\n",whichButton.tag);
          if (whichButton.tag == 0) {
              NSLog(@"currentImageId1 %d",currentImageId1);
              [delegate imageZoom:currentImageId1];
          }

UITabelView行ごとに 3 つの画像を持つ with customcell を作成しました。画像hadlePressメソッドをタップすると呼び出されます。