-(void)setUpTitleView{
    UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
    [btn setTitle:@"菜单" forState:UIControlStateNormal];
    [btn setTitleColor:[UIColor blueColor] forState:UIControlStateNormal];
    [btn addTarget:self action:@selector(btnClick) forControlEvents:UIControlEventTouchUpInside];
    self.navigationItem.titleView = btn;
}
-(void)btnClick{
    //创建弹出的控制器
    HXJumpViewController *jumpVc = [[HXJumpViewController alloc]init];
    //设置modal的样式  默认是UIModalPresentationNone:该控制器后面的控制器不会显示
    jumpVc.modalPresentationStyle = UIModalPresentationCustom;
    //设置弹出View的frame 是自定义的属性
    self.popoverAnimator.presentFrame = CGRectMake(100, 55, 180, 250);
    //设置转场代理transitioningDelegate来实现动画
    jumpVc.transitioningDelegate = self.popoverAnimator;
    [self presentViewController:jumpVc animated:YES completion:nil];
}
//懒加载 
//这里的popoverAnimator一定要是强引用
//不然等btnClick 执行结束后 popoverAnimator销毁了,就不会执行popoverAnimator中定义的dismiss代理方法,我就被坑了...
-(HXPopoverAnimator *)popoverAnimator{
    if (!_popoverAnimator) {
        _popoverAnimator = [[HXPopoverAnimator alloc]init];
    }
    return _popoverAnimator;
}

-(void)containerViewWillLayoutSubviews{
    [super containerViewWillLayoutSubviews];
    //在这里设置弹出View的Frame
    self.presentedView.frame = self.presentFrame;
    //添加手势View
    [self.containerView insertSubview:self.maskView atIndex:0];
}
-(void)tapGes{
    [self.presentingViewController dismissViewControllerAnimated:YES completion:nil];
}
//懒加载背景View
-(UIView *)maskView{
    if (!_maskView) {
        _maskView = [[UIView alloc]init];
        _maskView.backgroundColor = [UIColor colorWithWhite:0.8 alpha:0.2];
        _maskView.frame = self.containerView.bounds;
        UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(tapGes)];
        [_maskView addGestureRecognizer:tap];
    }
    return _maskView;
}