swift:如何从xib获取self,loadNib实例化Vie

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class func showHUDAddedToWindowWithText(text: String) -> LEAlertHud {
    let alertHud = self.loadFromNib()
    alertHud.alertContentLabel.text = text
    alertHud.initUI()
    return alertHud
}

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// MARK: - How to initialise a UIView Class with a xib file in Swift
extension UIView {
class func loadFromNibNamed(nibNamed: String, bundle : NSBundle? = nil) -> UIView? {
    return UINib(
        nibName: nibNamed,
        bundle: bundle
        ).instantiateWithOwner(nil, options: nil)[0] as? UIView
    }
}

protocol UIViewLoading {}
extension UIView : UIViewLoading {}
extension UIViewLoading where Self : UIView {
// note that this method returns an instance of type `Self`, rather than UIView
static func loadFromNib() -> Self {
    let nibName = "\(self)".characters.split{$0 == "."}.map(String.init).last!
    let nib = UINib(nibName: nibName, bundle: nil)
    return nib.instantiateWithOwner(self, options: nil).first as! Self
}

}
参考文章:
http://stackoverflow.com/questions/24370061/assign-xib-to-the-uiview-in-swift
http://stackoverflow.com/questions/25513271/how-to-initialise-a-uiview-class-with-a-xib-file-in-swift-ios

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