今天刘国斌老师教了实战的一个demo，仿写音乐播放器

// 1、 如果在viewcontroller里跳转到别的页面里，另一个viewcontroller是storyboard拖出来的，初始化页面需要用self.stroy 再调用方法，instantiateViewControllerWithIdentifier

// 2、 但是如果在其他的页面不是viewcontroller里再跳转到另一个页面，那个页面也是用stroyboard拖出来的，那么就要用 UIStoryboard 通过自己的mainstoryboard标记“Main”先创建一个对象，在用这个对象去初始化另一个页面

UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];

// 宏定义自动获取的屏幕的尺寸

#define SCREEN_SIZE [UIScreen mainScreen].bounds.size

／／ 功能实现从第一个页面跳转到tabbarcontroller

@implementation ViewController

- (void)viewDidLoad {

[super viewDidLoad];

UIScrollView *sc=[[UIScrollView alloc]initWithFrame:[UIScreen mainScreen].bounds];

sc.pagingEnabled=YES;

for (int i=0; i<5; i++) {

UIImageView *iv=[[UIImageViewalloc]initWithFrame:CGRectMake(i*SCREEN_SIZE.width, 0, SCREEN_SIZE.width, SCREEN_SIZE.height)];

iv.image=[UIImage imageNamed:[NSStringstringWithFormat:@"Welcome_3.0_%d.jpg",i+1]];

[sc addSubview:iv];

}

CGRect bnFram=CGRectMake(0, 0, SCREEN_SIZE.width, SCREEN_SIZE.height);

UIButton *bn=[[UIButton alloc]initWithFrame:bnFram];

[bn addTarget:self action:@selector(moo) forControlEvents:UIControlEventTouchUpInside];

[sc addSubview:bn];

sc.delegate=self;

//  考虑到屏幕尺寸适配问题，这里的内容contentSize取动态的

sc.contentSize=CGSizeMake(5*SCREEN_SIZE.width, 667);

[self.view addSubview:sc];

}

-(void)moo{

tabONe *ta1=[tabONe new];

ta1.view.backgroundColor=[UIColor colorWithRed:.5 green:.5 blue:.6 alpha:.7];

ta1.title=@"原谅我这一生放荡不羁";

UINavigationController *nv1=[[UINavigationControlleralloc]initWithRootViewController:ta1];

nv1.tabBarItem.title=@"我的音乐";

nv1.tabBarItem.image=[UIImage imageNamed:@"tabbar_item_my_music.png"];

tabTwo *ta2=[tabTwo new];

ta2.view.backgroundColor=[UIColor redColor];

ta2.title=@"辣么屌";

UINavigationController *nv2=[[UINavigationControlleralloc]initWithRootViewController:ta2];

nv2.tabBarItem.title=@"网络";

nv2.tabBarItem.image=[UIImage imageNamed:@"tabbar_item_selected"];

tabThree *ta3=[tabThree new];

ta3.title=@"没文化，读书";

ta3.view.backgroundColor=[UIColor blueColor];

UINavigationController *nv3=[[UINavigationControlleralloc]initWithRootViewController:ta3];

nv3.tabBarItem.title=@"本地";

nv3.tabBarItem.image=[UIImage imageNamed:@"tabbar_item_store_selected.png"];

tabFour *ta4=[tabFour new];

ta4.title=@"多么痛的领悟";

ta4.view.backgroundColor=[UIColor greenColor];

UINavigationController *nv4=[[UINavigationControlleralloc]initWithRootViewController:ta4];

nv4.tabBarItem.title=@"更多";

nv4.tabBarItem.image=[UIImage imageNamed:@"tabbar_item_more.png"];

UITabBarController *tabBar=[[UITabBarController alloc]init];

tabBar.viewControllers=@[nv1,nv2,nv3,nv4];

[self presentViewController:tabBar animated:YES completion:nil];

}