在开发中经常会用头部标题+底部轮播或者页面转换，类似于头条效果，此时不能在UIScrollView+UITableView混合使用，如果使用UItableView的话，加载数据时滑动会导致程序崩溃，所以需要使用addChildViewController方法；
这里写一个简单的实例，标题栏仅写两个
总体布局为头部UIView上添加button，底部添加scrollView，scrollView上添加子控制器。
准备工作，新建两个ViewController：TestOneVC、TestTwoVC
1）新建UIView，命名为kndView；新建两个button：one、two；新建一个scrollView；
@property(nonatomic,strong)UIView *kindView;
@property(nonatomic,strong)UIButton *one;
@property(nonatomic,strong)UIButton *two;
@property(nonatomic,strong)UIScrollView *scrollView;
2）初始化kndView、one、two、scrollView
self.kindView = [[UIView alloc] initWithFrame:CGRectMake(0, 64, SCREEN_W, 44)];
self.kindView.backgroundColor = [UIColor colorWithHexString:@"FFFFFF"];
[self.view addSubview:self.kindView];
self.one = [UIButton buttonWithType:(UIButtonTypeCustom)];
[self.one setTitle:@"一" forState:(UIControlStateNormal)];
[self.one addTarget:self action:@selector(oneAction) forControlEvents:(UIControlEventTouchUpInside)];
self.one.frame = CGRectMake(0, 0, SCREEN_W/2, 44);
[self.kindView addSubview:self.one];
[self.one setTitleColor:[UIColor colorWithHexString:@"030303"] forState:(UIControlStateNormal)];
self.one.titleLabel.font = [UIFont systemFontOfSize:18];
self.two = [UIButton buttonWithType:(UIButtonTypeCustom)];
[self.two setTitle:@"er" forState:(UIControlStateNormal)];
[self.two addTarget:self action:@selector(twoAction) forControlEvents:(UIControlEventTouchUpInside)];
self.two.frame = CGRectMake(SCREEN_W/2, 0, SCREEN_W/2, 44);
[self.kindView addSubview:self.two];
[self.two setTitleColor:[UIColor colorWithHexString:@"999999"] forState:(UIControlStateNormal)];
self.two.titleLabel.font = [UIFont systemFontOfSize:16];
self.scrollView = [[UIScrollView alloc] init];
[self.view addSubview:self.scrollView];
self.scrollView.frame = CGRectMake(0, CGRectGetMaxY(self.kind.frame), SCREEN_W, SCREEN_H-64-44-44);
self.scrollView.delegate = self;
self.scrollView.contentSize = CGSizeMake(SCREEN_W*2, 0);
self.scrollView.bounces = NO;
self.scrollView.pagingEnabled = YES;
self.scrollView.showsHorizontalScrollIndicator = NO;
self.scrollView.scrollEnabled = NO;
self.scrollView.delegate = self;
3)添加第一个子控制器
TestOneVC *one = [[TestOneVC alloc] init];
[self.scrollView addSubview:one.view];
[self addChildViewController:one];
[self.view insertSubview:self.scrollView belowSubview:self.kindView];
4）创建剩余的子控制器
- (void)setupChildViewController{
TestTwoVC *two = [[TestTwoVC alloc] init];
[self addChildViewController:two];
}
5）button方法+子控制器选择方法
- (void)showVc:(NSInteger)index {
CGFloat offsetX = index * SCREEN_W;
UIViewController *vc = self.childViewControllers[index];
// 判断控制器的view有没有加载过,如果已经加载过,就不需要加载
if (vc.isViewLoaded) return;
[self.backScroll addSubview:vc.view];
vc.view.frame = CGRectMake(offsetX, 0, self.view.frame.size.width, self.view.frame.size.height);
}
-(void)oneAction{
self.scrollView.contentOffset = CGPointMake(0, 0);
[self.one setTitleColor:[UIColor colorWithHexString:@"030303"] forState:(UIControlStateNormal)];
self.one.titleLabel.font = [UIFont systemFontOfSize:18];
[self.two setTitleColor:[UIColor colorWithHexString:@"999999"] forState:(UIControlStateNormal)];
self.two.titleLabel.font = [UIFont systemFontOfSize:16];
[self showVc:0];
}
-(void)twoAction{
[self showVc:1];
self.backScroll.contentOffset = CGPointMake(SCREEN_W, 0);
[self.one setTitleColor:[UIColor colorWithHexString:@"999999"] forState:(UIControlStateNormal)];
self.one.titleLabel.font = [UIFont systemFontOfSize:16];
[self.two setTitleColor:[UIColor colorWithHexString:@"030303"] forState:(UIControlStateNormal)];
self.two.titleLabel.font = [UIFont systemFontOfSize:18];
}
6）如果想要滑动，在scrollView的代理方法中添加一下方法：
- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView{
if (scrollView.contentOffset.x/SCREEN_W==0) {
[self.one setTitleColor:[UIColor colorWithHexString:@"030303"] forState:(UIControlStateNormal)];
elf.one.titleLabel.font = [UIFont systemFontOfSize:18];
self.two.titleLabel.font = [UIFont systemFontOfSize:16];
[self showVc:0];
}else{
[self.one setTitleColor:[UIColor colorWithHexString:@"999999"] forState:(UIControlStateNormal)];
self.one.titleLabel.font = [UIFont systemFontOfSize:16];
[self.two setTitleColor:[UIColor colorWithHexString:@"030303"] forState:(UIControlStateNormal)];
self.two.titleLabel.font = [UIFont systemFontOfSize:18];
[self showVc:1];
}
}
7）细节处理
self.automaticallyAdjustsScrollViewInsets = NO;//不让view乱跑
TestOneVC *one = [[TestOneVC alloc] init];
[self.scrollView addSubview:one.view];//添加one的view控制器到scrollView上，已经添加过了，所以创建子控制器时不需要再添加这一个了
[self addChildViewController:one];//添加子控制器
[self.view insertSubview:self.scrollView belowSubview:self.kindView];将self.scrollView添加在kindView的下边
