从 xib 文件加载 ViewController

Loading ViewController from xib file(从 xib 文件加载 ViewController)

问题描述

我有一个 MyViewController.swift 和一个 MyViewController.xib 展示 MyViewController 的布局.

I had a MyViewController.swift and a MyViewController.xib presenting the layout of MyViewController.

我尝试了不同的方法来加载这个视图控制器，包括:

I tried different methods to load this view controller including:

//1
let myVC = UINib(nibName: "MyViewController", bundle:
       nil).instantiateWithOwner(nil, options: nil)[0] as? MyViewController

//2
let myVC = NSBundle.mainBundle().loadNibNamed("MyViewController", owner: self, options: nil)[0] as? MyViewController

//3
let myVC = MyViewController(nibName: "MyViewController", bundle: nil)

第三个是唯一成功的初始化，但前两个导致错误:

The third one is the only successful initialisation, but the previous two are causing error:

由于未捕获的异常NSUnknownKeyException"而终止应用程序，

Terminating app due to uncaught exception 'NSUnknownKeyException',

原因:'[setValue:forUndefinedKey:]: this类与键 XXX 的键值编码不兼容.

reason: '[ setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key XXX.

这些加载方法有什么问题?

What's wrong with those loading methods?

推荐答案

Swift 3

let myViewController = MyViewController(nibName: "MyViewController", bundle: nil)
self.present(myViewController, animated: true, completion: nil)

或推入导航控制器

self.navigationController!.pushViewController(MyViewController(nibName: "MyViewController", bundle: nil), animated: true)

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