iOS8 UILocalNotification 添加启动授权

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好久没接入UILocalNotification了。今天接入时发现没有权限启动通知。

错误例如以下：

Attempting to schedule a local notification <UIConcreteLocalNotification: 
0x174178540>{fire date = (null), time zone = (null), repeat interval =
0, repeat count = UILocalNotificationInfiniteRepeatCount, next fire
a badge number but haven't received permission from the user to badge
the application

看了下API。原来iOS8添加了启动授权。须要用户允许下才干注冊通知。

加入例如以下代码：

- (void)RegistNotificationSettings
{
    float sysVersion=[[UIDevice currentDevice]systemVersion].floatValue;
    if (sysVersion>=8.0) {
        UIUserNotificationType type = UIUserNotificationTypeBadge | UIUserNotificationTypeAlert | UIUserNotificationTypeSound;
        UIUserNotificationSettings *setting = [UIUserNotificationSettings settingsForTypes:type categories:nil];
        [[UIApplication sharedApplication] registerUserNotificationSettings:setting];
    }
}

你能够在注冊通知之前调用。也能够在app启动时候调用

- (BOOL)application:(UIApplication*)application didFinishLaunchingWithOptions:(NSDictionary*)launchOptions
{
    // todo ...

    [self RegistNotificationSettings];
    return YES;
}

注意：仅仅要用户对app授权过了，以后即使删除再次安装，也默觉得授权了。