iOS本地推送

 第一步：创建本地推送
 // 创建一个本地推送
 UILocalNotification *notification = [[[UILocalNotification alloc] init] autorelease];
 //设置10秒之后
 NSDate *pushDate = [NSDate dateWithTimeIntervalSinceNow:10];
 if (notification != nil) {
     // 设置推送时间
     notification.fireDate = pushDate;
     // 设置时区
     notification.timeZone = [NSTimeZone defaultTimeZone];
     // 设置重复间隔
     notification.repeatInterval = kCFCalendarUnitDay;
     // 推送声音
     notification.soundName = UILocalNotificationDefaultSoundName;
     // 推送内容
     notification.alertBody = @"推送内容";
     //显示在icon上的红色圈中的数子
     notification.applicationIconBadgeNumber = 1;
     //设置userinfo 方便在之后需要撤销的时候使用
     NSDictionary *info = [NSDictionary dictionaryWithObject:@"name"forKey:@"key"];
     notification.userInfo = info;
     //添加推送到UIApplication
     UIApplication *app = [UIApplication sharedApplication];
     [app scheduleLocalNotification:notification];

 }

 第二步：接收本地推送
 - (void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification*)notification{
     UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"iWeibo" message:notification.alertBody delegate:nil cancelButtonTitle:@"确定" otherButtonTitles:nil];
     [alert show];
     // 图标上的数字减1
     application.applicationIconBadgeNumber -= 1;
 }

 第三步：解除本地推送
 // 获得 UIApplication
 UIApplication *app = [UIApplication sharedApplication];
 //获取本地推送数组
 NSArray *localArray = [app scheduledLocalNotifications];
 //声明本地通知对象
 UILocalNotification *localNotification;
 if (localArray) {
     for (UILocalNotification *noti in localArray) {
         NSDictionary *dict = noti.userInfo;
         if (dict) {
             NSString *inKey = [dict objectForKey:@"key"];
             if ([inKey isEqualToString:@"对应的key值"]) {
                 if (localNotification){
                     [localNotification release];
                     localNotification = nil;
                 }
                 localNotification = [noti retain];
                 break;
             }
         }
     }

     //判断是否找到已经存在的相同key的推送
     if (!localNotification) {
         //不存在初始化
         localNotification = [[UILocalNotification alloc] init];
     }

     if (localNotification) {
         //不推送 取消推送
         [app cancelLocalNotification:localNotification];
         [localNotification release];
         return;
     }
 }