iOS开发（OC）——本地通知

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1、创建本地通知

UIApplication * application=[UIApplication sharedApplication];
    //如果当前应用程序没有注册本地通知，需要注册
    if([application currentUserNotificationSettings].types==UIUserNotificationTypeNone){
        //设置提示支持的提示方式
        //      UIUserNotificationTypeBadge   提示图标
        //      UIUserNotificationTypeSound   提示声音
        //      UIUserNotificationTypeAlert   提示弹框
        UIUserNotificationSettings * setting=[UIUserNotificationSettings settingsForTypes:UIUserNotificationTypeBadge|UIUserNotificationTypeSound|UIUserNotificationTypeAlert categories:nil];
        [application registerUserNotificationSettings:setting];
    }
    //删除之前的重复通知
    [application cancelAllLocalNotifications];
    //添加本地通知
    NSDate * date=[NSDate dateWithTimeIntervalSinceNow:];//从现在开始3秒后发送

    UILocalNotification * noti=[[UILocalNotification alloc] init];
    NSDictionary *dict=[NSDictionary dictionaryWithObject:@"1" forKey:@"id"];
    noti.userInfo=dict;
    //设置开始时间
    noti.fireDate=date;
    //设置body
    noti.alertBody[email protected]"第一条";//显示的内容
    //设置action
    noti.alertAction[email protected]"详情";
    //设置闹铃
    noti.soundName[email protected]"4195.mp3";
    //注册通知
    [[UIApplication sharedApplication] scheduleLocalNotification:noti];
           

2、删除某个本地通知

NSArray *notificaitons = [UIApplication sharedApplication].scheduledLocalNotifications;//获取当前所有的本地通知

    if (!notificaitons || notificaitons.count <= ) {
        return;
    }
    for (UILocalNotification *notify in notificaitons) {
        if ([[notify.userInfo objectForKey:@"id"] isEqualToString:@"1"]) {
            //取消一个特定的通知
            [[UIApplication sharedApplication] cancelLocalNotification:notify];
            break;
        }
    }
           

本地通知是有数量限制的，一个应用可同时存在的本地通知数量为64个，包括发送的和未发送的，所以要及时处理掉已经过期的通知，否则用着用着就发现通知没用了