iOS8需知

1.UILocalNotification     .alertTitle  8.2+

2.导航条添加tap手势，iOS8上页面销毁手势依然存在，点击导航条crash，区分iOS9以上及以下

UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(removeMenuView)];

[self.navigationController.view addGestureRecognizer:tap];