UIView添加手势

    _shareImage.userInteractionEnabled=YES;

    UITapGestureRecognizer *imagegesture=[[UITapGestureRecognizer alloc] initWithTarget:_delegate action:@selector(OnTouchImageViewHiddenKeyboard)];

    imagegesture.numberOfTapsRequired=1;

    [_shareImage addGestureRecognizer:imagegesture];