直接上代码：
var myDelegate:AppDelegate?
myDelegate = UIApplication.sharedApplication().delegate as? AppDelegateOC中APPDelegate[[UIApplication shareApplication]delegate]]Swift实现,布布扣,bubuko.com
OC中APPDelegate[[UIApplication shareApplication]delegate]]Swift实现
原文：http://blog.csdn.net/zhiwei_qin/article/details/30048097