界面跳转

1. 模态跳转（Modal）
   普通的视图控制器一般只有模态跳转的功能，这个方法是所有视图控制器对象都可以用的。

-(void)presentViewController:(UIViewController *)viewControllerToPresent animated: (BOOL)flag completion:(void (^)(void))completion

• 一般跳转前和跳转后的界面通过delegate进行数据交换。
• 控制器的中的只读属性：presentedViewController和presentingViewController，他们分别就是被present的控制器和正在presenting的控制器。
• 通过 dismissViewControllerAnimated 来返回前一个界面的。

2. 通过Segue来跳转
   Segue：多出现于UIStoryboard中，是不同类之间跳转的一根线。换种说法就是：Storyboard上每一根用来界面跳转的线，都是一个UIStoryboardSegue对象

Segue

跳转步骤：

• 创建一个UIStoryboardSegue对象

+(instancetype)segueWithIdentifier:(nullable NSString *)identifier source:(UIViewController *)source destination:(UIViewController *)destination performHandler:(void (^)(void))performHandler NS_AVAILABLE_IOS(6_0);

or

-(instancetype)initWithIdentifier:(nullable NSString *)identifier source:(UIViewController *)source destination:(UIViewController *)destination NS_DESIGNATED_INITIALIZER;

• 调用

-(void)performSegueWithIdentifier:(NSString *)identifier sender:(id)sender

• 系统在跳转前自动调用

-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
  segue.sourceViewController;
  segue.destinationViewController;
}

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3. 通过NavigationController跳转

[self pushViewController:.. animated:YES];

[self hidesBottomBarWhenPushed];

4. UITabBarController

self.selectedItem = 1;

---

如何从Storyboard中创建ViewController

//通过使用storyborardID去获取启动页viewcontroller
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Launch Screen" bundle:nil];
UIViewController *viewController = [storyboard instantiateViewControllerWithIdentifier:@"LaunchScreen"];

UIWindow *mainWindow = [UIApplication sharedApplication].keyWindow;

加载启动图

//主界面加载 显示之前
- (void)viewDidAppear:(BOOL)animated {
    [super viewDidAppear:animated];
    [self launchAnimation];
}

切换rootViewController

[UIView transitionWithView:weakSelf.window duration:0.8 options:UIViewAnimationOptionTransitionFlipFromRight animations:^{

  BOOL oldState = [UIView areAnimationsEnabled];

  [UIView setAnimationsEnabled:NO];

  [weakSelf.window setRootViewController:nav];

  [UIView setAnimationsEnabled:oldState];

} completion:^(BOOL finished) {

}];

跳转时的动画效果

CATransition *animation = [CATransition animation]; [animation setDuration:3.3]; [animation setType:kCATransitionFade]; //淡入淡出 [animation setSubtype:kCATransitionFromLeft]; [animation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionDefault]]; MapViewController *mapview = [[MapViewController alloc] initWithNibName:Nil bundle:NULL]; [self.navigationController pushViewController:mapview animated:NO]; [self.navigationController.view.layer addAnimation:animation forKey:nil];