IOS UIButton长按事件

//按钮长按
        UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPress:)];
       //长按时间
        longPress.minimumPressDuration = 0.8;
        [titleButton addGestureRecognizer:longPress];