Storyboard & XIB 自己的理解

//1.storyboard

//(1)

//此处bundle:nil 等价于 [NSBundle mainBundle]

//    SecondViewController *secondVc = [[UIStoryboard storyboardWithName:@"Main" bundle:nil]instantiateViewControllerWithIdentifier:@"Second"];

//    SecondViewController *secondVc = [[UIStoryboard storyboardWithName:@"Main" bundle:[NSBundle mainBundle]]instantiateViewControllerWithIdentifier:@"Second"];

//(2)

//SecondViewController *secondVc = [[UIStoryboard storyboardWithName:@"SecondSB" bundle:nil]instantiateViewControllerWithIdentifier:@"Second"];

//(3)

//    SecondViewController *secondVc = [[UIStoryboard storyboardWithName:@"SecondSB" bundle:nil]instantiateInitialViewController];

//2.与控制器同名的XIB文件 SecondViewController.xib init或initWithNibName加载

//(1)

//    SecondViewController *secondVc = [[SecondViewController alloc]init];

//(2)

//    SecondViewController *secondVc = [[SecondViewController alloc]initWithNibName:@"SecondViewController" bundle:nil];

//3.与控制器不同名的XIB文件 View.xib loadNibNamed加载控制器的view

/*

在创建控制器的时候直接指定要加载xib作为控制器的view,名称不相干

> 需要修改xib文件的fileOwner进行关联

> 需要将fileOwner里面的view指向xib里面的view

*/

//（1）initWithNibName---注重file owner

SecondViewController *secondVc = [[SecondViewController alloc]initWithNibName:@"Second" bundle:nil];

//（2）

//    SecondViewController *secondVc = [[SecondViewController alloc]init];

//    secondVc.view = [[[NSBundle mainBundle]loadNibNamed:@"SecondViewController" owner:nil options:nil] lastObject];

//4.与控制器不同名的XIB文件 删除View,创建控制器  loadNibNamed---注重xib中内容

//    SecondViewController *secondVc = [[[NSBundle mainBundle]loadNibNamed:@"SecondVC" owner:nil options:nil] lastObject];