IOS手势

UITapGestureRecognizer *doubleClick = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(PictureClick:)];
    doubleClick.numberOfTapsRequired = 2;
    [m_viewImg addGestureRecognizer: doubleClick];


-(void) PictureClick: (UITapGestureRecognizer *)sender{

}