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class IndexViewController: UIViewController{}
let className = "IndexViewController"
let bundlePath = NSBundle.mainBundle().bundlePath
let bundleFullName = bundlePath.componentsSeparatedByString("/").last
let bundleName = bundleFullName?.componentsSeparatedByString(".").first
let clazz = NSClassFromString(bundleName! + "." + className)! as! UIViewController.Type
let object = clazz.init()
// let object1 = Index() 普通方法
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原文地址：http://www.cnblogs.com/threeday/p/5265744.html
