delay(2, { () -> () in
	println("2秒后执行")
})
let task = delay(1,{ () -> () in)
	println("已经取消了，永远进不来")
}
cancel(task)

var alert : UIAlertView = UIAlertView(title: "", message: text,delegate:nil, cancelButtonTitle:"取消",otherButtonTitles: "确定")
alert.show({ (index) -> Void in
	if index == 0{
		println("按了取消")
    }else{
    	println("按了确定")
    }
})

var t = UIActionSheet(title: "", delegate: nil, cancelButtonTitle: "取消", destructiveButtonTitle: "删除", otherButtonTitles: "按钮1", "按钮2")
t.showInView(self.view, finish: { (index) -> Void in
	println(index)
})

var sheet = BYAlertController(title: "选择图片", message: nil, preferredStyle: .ActionSheet, cancelButtonTitle: "取消", otherButtonTitles: "拍照","相册")
sheet.showAlertViewInViewController(self, clickedCancelButton: {
	println("按了取消"")
})
{ (index) -> () in
	println(index)	 
}

var imagePickerController = UIImagePickerController()   imagePickerController.showInViewController(someVC, finish: { (image) -> Void in
    someImageView.image = image
    return
})