先編譯幾個子檢視控制器

//*子檢視控制器*/

@property (nonatomic, strong) tableVC *firstVC;

@property (nonatomic, strong) ViewController1 *secondVC;

@property (nonatomic, strong) ViewController2 *thirdVC;

@property (nonatomic, strong) ViewController4 *fourVC;

//*當前檢視控制器*/

@property (nonatomic, strong) UIViewController

@property (nonatomic, strong) UIScrollView *headScrollView;

@property (nonatomic, strong) NSMutableArray *itemArray;

@property (nonatomic, strong) UIView *contentVie

第一步：頭部列表檢視的建立

_itemArray = [NSMutableArrayarrayWithObjects:@"頭條",@"今日",@"焦點",@"呵呵" ,nil];

_headScrollView = [[

_headScrollView.backgroundColor = [UIColorcolorWithWhite:0.902alpha:1.000];

for (int i = 0; i<_itemArray.count; i++) {

UIButton *itemButton = [[UIButtonalloc]initWithFrame:CGRectMake(i*([UIScreenmainScreen

        itemButton.tag = 100+i;

        itemButton.backgroundColor = [UIColorclearColor];

NSDictionary *dic = @{NSForegroundColorAttributeName:[UIColorpurpleColor],NSFontAttributeName:[UIFontsystemFontOfSize:14.0f]};

        [itemButton setAttributedTitle:[[NSAttributedStringalloc]initWithString:_itemArray[i] attributes:dic] forState:UIControlStateNormal];

        [itemButton addTarget:selfaction:@selector(buttonClick:) forControlEvents:UIControlEventTouchUpInside];

        [_headScrollViewaddSubview:itemButton];

    }

    [_headScrollViewsetContentSize:CGSizeMake([UIScreenmainScreen].bounds.size.width, 44)];

_headScrollView.showsHorizontalScrollIndicator = NO;

_headScrollView.showsVerticalScrollIndicator = NO;

    [self.viewaddSubview:_headScrollView];

   第二步：設定檢視展示子檢視VC的frame 

_contentView = [[UIViewalloc]initWithFrame:CGRectMake(0, 64, [UIScreenmainScreen].bounds.size.width, [UIScreen mainScreen].bounds.size.height  - 64)];

_contentView.backgroundColor = [UIColorclearColor];

    [self.viewaddSubview:_contentView];

第三步：新增子檢視控制器

{

_firstVC = [[tableVCalloc]init];

    [selfaddChildViewController:_firstVC];

_secondVC = [[ViewController1alloc]init];

    [selfaddChildViewController:_secondVC];

_thirdVC = [[ViewController2alloc]init];

    [selfaddChildViewController:_thirdVC];

_fourVC = [[ViewController4alloc]initWithNibName:@"ViewController4"bundle:nil];

    [selfaddChildViewController:_fourVC];

//預設展示的是第一個子檢視控制器*/

//調整子檢視控制器的Frame已適應容器View

    [selffitFrameForChildViewController:_firstVC];

//設定預設顯示在容器View的內容

    [self.contentViewaddSubview:_firstVC.view];

_currentVC = _firstVC;

//點選事件

- (void)buttonClick:(UIButton *)sender{

if ((sender.tag == 100 && _currentVC == _firstVC) || (sender.tag == 101 && _currentVC == _secondVC) || (sender.tag == 102 && _currentVC == _thirdVC) || (sender.tag == 103 && _currentVC == _fourVC)) {

return;

    }

switch (sender.tag) {

case100:{

            [selffitFrameForChildViewController:_firstVC];

            [selftransitionFromOldViewController:_currentVCtoNewViewController:_firstVC];

        }

break;

case101:{

            [selffitFrameForChildViewController:_secondVC];

            [selftransitionFromOldViewController:_currentVCtoNewViewController:_secondVC];

        }

break;

case102:{

            [selffitFrameForChildViewController:_thirdVC];

            [selftransitionFromOldViewController:_currentVCtoNewViewController:_thirdVC];

        }

case103:{

            [selffitFrameForChildViewController:_fourVC];

            [selftransitionFromOldViewController:_currentVCtoNewViewController:_fourVC];

        }

break;

    }

}

- (void)fitFrameForChildViewController:(UIViewController *)chileViewController{

CGRect frame = self.contentView.frame;

    frame.origin.y = 0;

    chileViewController.view.frame = frame;

}

//轉換子檢視控制器

- (void)transitionFromOldViewController:(UIViewController *)oldViewController toNewViewController:(UIViewController *)newViewController{

    [selftransitionFromViewController:oldViewController toViewController:newViewController duration:0.3options:UIViewAnimationOptionTransitionCrossDissolveanimations:nilcompletion:^(BOOL finished) {

if (finished) {

            [newViewController didMoveToParentViewController:self];

_currentVC = newViewController;

        }else{

_currentVC = oldViewController;

        }

    }];

}

//移除所有子檢視控制器

- (void)removeAllChildViewControllers{

for (UIViewController *vc inself.childViewControllers) {

        [vc willMoveToParentViewController:nil];

        [vc removeFromParentViewController];

    }

}