? ? ? ?iOS上有兩種消息通知，一種是本地消息（Local Notification），一種是遠(yuǎn)程消息(Push Notification，也叫Remote Notification)，設(shè)計(jì)這兩種通知的目的都是為了提醒用戶，現(xiàn)在有些什么新鮮的事情發(fā)生了，吸引用戶重新打開應(yīng)用。本地推送也可以通過服務(wù)器控制，比如說如果有新消息了，推送消息，但是，前提是程序必須是打開的，而遠(yuǎn)程推送，是通過蘋果APNS服務(wù)器，推送給手機(jī)，手機(jī)在推送給具體的哪個(gè)程序，一般遠(yuǎn)程推送用到的比較多。

在iOS8之后，以前的本地推送寫法可能會(huì)出錯(cuò)，接收不到推送的信息，

如果出現(xiàn)以下信息：

1 Attempting to schedule a local notification

2 with an alert but haven't received permission from the user to display alerts

3 with a sound but haven't received permission from the user to play sounds

說明在IOS8下沒有注冊，所以需要額外添加對(duì)IOS8的注冊方法，API中有下面這個(gè)方法：

// Registering UIUserNotificationSettings more than once results in previous settings being overwritten.

-?(void)registerUserNotificationSettings:(UIUserNotificationSettings*)notificationSettings?NS_AVAILABLE_IOS(8_0);

第一步：創(chuàng)建本地推送

第二步：接收本地推送

第三步：解除本地推送

過程中可能會(huì)出現(xiàn)如下狀況：

Attempting to schedule a local notification……with a sound but haven't received permission from the user to play sounds

Attempting to schedule a local notification……with an alert but haven't received permission from the user to display alerts

可能是因?yàn)槟銢]有注冊，或者設(shè)置中沒有開啟推送功能