您 didFailToRegisterForRemoteNotificationsWithError 方法不叫，因为注册没有失败 - 这是从来没有试图因为用户拒绝了这一要求。

Your didFailToRegisterForRemoteNotificationsWithError method isn't called, because the registration didn't fail - it was never even attempted because the user denied the request.

在iOS7你可以做两件事情：

On iOS7 you can do a couple of things:

1. 假设远程通知才会可用 didRegisterForRemoteNotificationsWithDeviceToken 被称为


2. 检查值 enabledRemoteNotificationTypes 的的UIApplication 对象

1. Assume that remote notifications aren't available until didRegisterForRemoteNotificationsWithDeviceToken is called
2. Check the value enabledRemoteNotificationTypes on the UIApplication object