iOS8系统下的无法弹出通知

<span style="font-size: 18px; font-family: Arial; line-height: 26px;">在iOS8系统开发使用本地通知时，通知无法弹出，会出现如下的提示Log：</span>

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

原因在于iOS8系统变更了注册方法，需要在ApplicationDelegate里面注册通知才可以。

if ([UIApplication instancesRespondToSelector:@selector(registerUserNotificationSettings:)])
    {
        [application registerUserNotificationSettings:[UIUserNotificationSettings settingsForTypes:UIUserNotificationTypeAlert|UIUserNotificationTypeBadge|UIUserNotificationTypeSound categories:nil]];
    }