我无法找到有关执行segue的帮助,或者至少在iOS 8或更高版本中使用swift进行某种视图转换。我试图尽量避免使用Storyboard编辑器,除了从主视图控制器到xib实现segue。
这是我到目前为止所做的:
let bundle = NSBundle(forClass: self.dynamicType)
let secondViewController = ViewController(nibName: "SwitchRegionSegue", bundle: nil)
self.presentViewController(secondViewController, animated: true, completion: nil)
使用Single View Application新项目脚手架从主ViewController.swift调用上面的代码。但它会导致崩溃:
*** 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:
SwitchRegionSegue.xib
SwitchRegionSegue.swift
我已确保xib的文件所有者自定义类设置为SwitchRegionSegue : UIView
我的SwitchRegionSegue.swift只是一个空白画布,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得不对吗? (建议使用好的swift& xib教科书会很棒)
答案 0 :(得分:0)
在 .xib 文件中,必须有两件事:
文件所有者代理的类在Identity检查器中设置为视图控制器的类。
文件所有者代理的view
出口必须连接到笔尖中的视图对象。
你忘记了其中一个。
答案 1 :(得分:0)
我从你的代码中注意到的问题:
1)从 UIViewController 继承 SwitchRegionSegue ,而不是 UIView
2)设置你的xib的类
3)将笔尖中的视图对象连接到视图插座
然后在主ViewController中编写此代码:
override func viewDidAppear(animated: Bool) {
super.viewDidAppear(animated)
let secondViewController = SwitchRegionSegue(nibName: "SwitchRegionSegue", bundle: nil)
self.presentViewController(secondViewController, animated: true, completion: nil)
}