代码精华部分如下：
//1.添加scrollView /* 1). 添加一个scrollView;2).创建关注、热门、附近三个控制器。3). 存储它们的名字到数组中，遍历并放到本控制器里。4).设置scrollView的contentSize.5).设置scrollview的偏移量。6).调用当停止动画的方法设置为当前的scrollView.（应该是停止拖拽的方法）*/NSArray *controls = @[@"STRFollowViewController",@"STRHotViewController",@"STRNearViewController"];for (NSInteger i = 0; i < controls.count; i++) {UIViewController *vc = [[NSClassFromString(controls[i]) alloc] init];vc.title = self.titleNames[i];[self addChildViewController:vc];}self.MainScrollView.contentSize = CGSizeMake(self.titleNames.count *[UIScreen mainScreen].bounds.size.width , 0);self.MainScrollView.contentOffset = CGPointMake(SCREEN_WIDTH, 0);[self scrollViewDidEndDecelerating:self.MainScrollView];}//2.设置代理#pragma mark scrollViewDelegate- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView{[self scrollViewDidEndScrollingAnimation:scrollView];}- (void)scrollViewDidEndScrollingAnimation:(UIScrollView *)scrollView{/**1. 获取宽度和高度,还要打开分页功能2. 获取索引值。3. 设置偏移量4. 设置viewframe,如没有加载过再加载，否则不返回5. 添加子控制器view到scrollview上*/NSInteger width = SCREEN_WIDTH;NSInteger height = SCREEN_HEIGHT;CGFloat offsetX = scrollView.contentOffset.x;NSInteger index = offsetX/width;[self.topView topViewWithIndex:index];UIViewController *vc = self.childViewControllers[index];if ([vc isViewLoaded]) return;vc.view.frame = CGRectMake(offsetX, 0, width, height);[self.MainScrollView addSubview:vc.view];}//3.添加topView- (STRTopView *)topView{if (!_topView) {_topView = [[STRTopView alloc] initWithFrame:CGRectMake(0, 0, 200, 44) titleNames:self.titleNames tagBlock:^(NSInteger index) {[self.MainScrollView setContentOffset:CGPointMake(index *SCREEN_WIDTH, 0) animated:YES];}];}return _topView;}
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