http://www.welp.cn/question/24298
[代码分享]使用协议代理Delegate与通知中心NSNotificationCenter实现页面传值(新手教程)
http://www.cocoachina.com/bbs/read.php?tid=169038&keyword=%B4%AB%D6%B5
控制器传值,代理,监听,通知中心,kvo/kvc等
http://www.cocoachina.com/bbs/read.php?tid=195103&keyword=%B4%AB%D6%B5
协议 代理
http://www.cocoachina.com/bbs/read.php?tid=134879&keyword=%D0%AD%D2%E9
http://www.cocoachina.com/bbs/read.php?tid=200104&keyword=%D0%AD%D2%E9
-(void)btn { // NSLog(@"%@",self.navigationController.childViewControllers[0]); self.passValueDelegate=self.navigationController.childViewControllers[0]; [self.navigationController popToRootViewControllerAnimated:YES]; [self.passValueDelegate setValue:@"123456789"]; }