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我想把一个xib文件作为子视图在我的主视图控制器,我得到一个非常奇怪的错误消息;不能添加自我作为子视图 - 当添加xib文件作为子视图
,当我有这样的代码:
class MyViewController: UIInputViewController {
var mainView : UIView!
override func viewDidLoad() {
super.viewDidLoad()
mainView = UINib(nibName: "MainView", bundle: nil).instantiateWithOwner(self, options: nil)[0] as! UIView
self.view.addSubview(mainView)
}
}
我有这样的错误消息:
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Can't add self as subview' ***
但,当我有这样的代码:
class MyViewController: UIInputViewController {
override func viewDidLoad() {
super.viewDidLoad()
let subViewsArray = [
UINib(nibName: "MainView", bundle: nil).instantiateWithOwner(self, options: nil)[0] as! UIView
]
self.view.addSubview(subViewsArray[0])
}
}
或者干脆这一个:
class MyViewController: UIInputViewController {
override func viewDidLoad() {
super.viewDidLoad()
self.view.addSubview(UINib(nibName: "mainView", bundle: nil).instantiateWithOwner(self, options: nil)[0] as UIView)
}
}
它正在工作......那么,为什么第一个代码不工作!?
编辑:
,当我试图把两个子视图:
class MyViewController: UIInputViewController {
override func viewDidLoad() {
super.viewDidLoad()
let subViewsArray = [
UINib(nibName: "MainView", bundle: nil).instantiateWithOwner(self, options: nil)[0] as! UIView,
UINib(nibName: "AnotherView", bundle: nil).instantiateWithOwner(self, options: nil)[0] as! UIView
]
self.view.addSubview(subViewsArray[0])
self.view.addSubview(subViewsArray[1])
}
}
它不具有同样的错误信息工作了:
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Can't add self as subview' ***
尝试阅读此问题http://stackoverflow.com/questions/28201249/swift-assign-a-nib-to-self-in-class –