这里我写的是个传值的例子,介绍通知,跟OC的使用基本差不多

let center = NSNotificationCenter.defaultCenter()
        center.addObserver(self,selector: "getValue:",name: "name",object: nil)

func getValue(object: NSNotification) ->Void{
        print(object.object)
        print("object")
    }

func click()->Void{
        let dic = NSMutableDictionary()
        dic.setValue("str",forKey: "name")
        print(dic)
        NSNotificationCenter.defaultCenter().postNotificationName("name",object: dic as [NSObject: AnyObject])
        self.dismissViewControllerAnimated(true) { () -> Void in
            //
        }

    }

使用之后记得移除

deinit{
        // 移除通知
//        NSNotificationCenter.defaultCenter().removeObserver(self,object: nil)
//        NSNotificationCenter.defaultCenter().removeObserver(self)
    }

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