iOS手动加载控制器xib与指定加载控制器xib的情况分析

摘要: iOS手动加载控制器xib与指定加载控制器xib的情况分析

手动加载xib与指定加载xib的情况分析

1.指定加载xib

1.图片的操作过程!







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.当不指定加载哪个xib时(版本9.2)

1.图片


意思如下：

当没有指定加载哪个xib时的优先级,并且没有重写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，如果没有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