iOS手动加载控制器xib与指定加载控制器xib的状况分析

手动加载xib与指定加载xib的状况分析

1.指定加载xib

• 1.图片的操做过程!

• 2.代码

  - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
      self.window=[[UIWindow alloc]initWithFrame:[UIScreen mainScreen].bounds];
      UIViewController *vc=[[UIViewController alloc]initWithNibName:@"vc" bundle:nil];
      //ViewController *vc=[[ViewController alloc]initWithNibName:nil bundle:nil];
      //ViewController *vc=[[ViewController alloc]init];
      self.window.rootViewController=vc;
      [self.window makeKeyAndVisible];
      return YES;
  }

2.当不指定加载哪一个xib时(版本9.2)

• 1.图片
• 意思以下：

  • 当没有指定加载哪一个xib时的优先级,而且没有重写loadView时

  • 在本例中是这样的：当图片中三个xib都存时，默认是加载带controller.xib，也就三者的优先级就出现了

  • 当只其中两个的时候，参考第二条，若是没有controller.xib，会加载View.xib

  • 代码

    - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
        self.window=[[UIWindow alloc]initWithFrame:[UIScreen mainScreen].bounds];
    //    UIViewController *vc=[[UIViewController alloc]initWithNibName:@"View" bundle:nil];
        //ViewController *vc=[[ViewController alloc]initWithNibName:nil bundle:nil];
        ViewController *vc=[[ViewController alloc]init];
        self.window.rootViewController=vc;
        [self.window makeKeyAndVisible];
        return YES;
    }

3.github

• github三个xib都在时的全代码
• github只有两个xib时全代码