iOS手動加載控制器xib與指定加載控制器xib的狀況分析

手動加載xib與指定加載xib的狀況分析

1.指定加載xib

• 1.圖片的操做過程!

• 2.代碼

  - (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.當不指定加載哪一個xib時(版本9.2)

• 1.圖片
• 意思以下：

  • 當沒有指定加載哪一個xib時的優先級,而且沒有重寫loadView時

  • 在本例中是這樣的：當圖片中三個xib都存時，默認是加載帶controller.xib，也就三者的優先級就出現了

  • 當只其中兩個的時候，參考第二條，若是沒有controller.xib，會加載View.xib

  • 代碼

    - (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三個xib都在時的全代碼
• github只有兩個xib時全代碼