IOS iOS本地推送---常用开发中，通过消息传递信息

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; 
    } 
}