ios - 在Swift中以编程方式从MainViewController切换到.xib View ？

至少在iOS 8或更高版本上，我无法在执行搜索或快速进行某种视图转换方面找到帮助。除了实现从Main View Controller到xib的segue之外，我试图尽可能避免使用Storyboard编辑器。

这是我到目前为止所拥有的：

    let bundle = NSBundle(forClass: self.dynamicType)
    let secondViewController = ViewController(nibName: "SwitchRegionSegue", bundle: nil)
    self.presentViewController(secondViewController, animated: true, completion: nil)

上面的代码是使用Single View Application新项目支架从主ViewController.swift调用的。但这会导致崩溃：

*** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: '-[UIViewController _loadViewFromNibNamed:bundle:] loaded the "SwitchRegionSegue" nib but the view outlet was not set.'

我也有这两个文件，如下所示：

SwitchRegionSegue.xib

SwitchRegionSegue.swift

我确保将xib的文件所有者自定义类设置为SwitchRegionSegue : UIView

我的SwitchRegionSegue.swift只是一块空白画布，看起来像这样：

import UIKit

class SwitchRegionSegue: UIView {

    var view: UIView!

    var nibName = "SwitchRegionSegue"

    func xibSetup() {
        view = loadViewFromNib()

        // use bounds not frame or it'll be offset
        view.frame = bounds

        // Make the view stretch with containing view
        view.autoresizingMask = [UIViewAutoresizing.FlexibleWidth, UIViewAutoresizing.FlexibleHeight]
        addSubview(view)
    }

    func loadViewFromNib() -> UIView {

        let bundle = NSBundle(forClass: self.dynamicType)
        let nib = UINib(nibName: nibName, bundle: bundle)
        let view = nib.instantiateWithOwner(self, options: nil)[0] as! UIView

        return view
    }

    override init(frame: CGRect) {
        super.init(frame: frame)
        xibSetup()
    }

    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        xibSetup()
    }

}

有人知道我在这里做的不好吗？ （建议使用一部出色的Swift和Xib教科书会很棒）

最佳答案

我从您注意到的问题代码：

1）从UIViewController而不是UIView继承SwitchRegionSegue

2）设置您的xib的类别

3）将笔尖中的查看对象连接到查看插座

然后在主ViewController中编写以下代码：

override func viewDidAppear(animated: Bool) {
    super.viewDidAppear(animated)

    let secondViewController = SwitchRegionSegue(nibName: "SwitchRegionSegue", bundle: nil)
    self.presentViewController(secondViewController, animated: true, completion: nil)
}