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