cell底部也會被TabBar擋住

    self.tableView.contentInset  = UIEdgeInsetsMake(0, 0, 64, 0);

設定穿透效果

 //1.設定當有導航欄自動新增64的高度的屬性為NO
    self.automaticallyAdjustsScrollViewInsets = NO;
    [self hy_viewWillAppear:YES];

- (void)hy_viewWillAppear:(BOOL)animated {


    //清除邊框，設定一張空的圖片
    [self.navigationController
 
.navigationBar setBackgroundImage:nil forBarMetrics:UIBarMetricsDefault];
    [self.navigationController.navigationBar setShadowImage:nil];
    //
    [self setNavSubViewsAlpha];

}
- (void)setNavSubViewsAlpha {

    self.navigationItem.leftBarButtonItem.customView.alpha = 0;
    self.navigationItem.titleView
 
.alpha = 1;
    self.navigationItem.rightBarButtonItem.customView.alpha = 0;
    [[[self.navigationController.navigationBar subviews]objectAtIndex:0] setAlpha:0];
}

恢復原來導航欄的主題

-(void)scrollViewDidScroll:(UIScrollView *)scrollView{

    CGFloat offsetY = KBannerScreenHeight;
    CGPoint point = scrollView.contentOffset
 
;
    self.baralpha =  point.y/offsetY;
    self.baralpha = (self.baralpha <= 0)?0:self.baralpha;
    self.baralpha = (self.baralpha >= 1)?1:self.baralpha;
    //    [self setNavSubViewsAlpha];
    NSLog(@"%f",self.baralpha);
    if (self.baralpha >=1) {

        [self hy_viewWillDisappear:YES];

    }else{
        [self hy_viewWillAppear:YES];
    }

}