首页 > 代码库 > ios推送:本地通知UILocalNotification

ios推送:本地通知UILocalNotification

 
  转载自:http://www.2cto.com/kf/201403/285612.html

在去年做过一个小App,其中使用的关键功能就是向用户发送本地通知,可惜当时没有写博客的习惯,所以没有将对应的知识记录下来。最近又遇到了该功能的使用,这一次果断写个博客做下有关UILocalNotification的笔记。

 

首先是添加一个本地通知到系统中,代码如下:

 

?
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
// 初始化本地通知对象
UILocalNotification *notification = [[UILocalNotification alloc] init];
if (notification) {
    // 设置通知的提醒时间
    NSDate *currentDate   = [NSDate date];
    notification.timeZone = [NSTimeZone defaultTimeZone]; // 使用本地时区
    notification.fireDate = [currentDate dateByAddingTimeInterval:5.0];
     
    // 设置重复间隔
    notification.repeatInterval = kCFCalendarUnitDay;
     
    // 设置提醒的文字内容
    notification.alertBody   = @"Wake up, man";
    notification.alertAction = NSLocalizedString(@"起床了", nil);
     
    // 通知提示音 使用默认的
    notification.soundName= UILocalNotificationDefaultSoundName;
     
    // 设置应用程序右上角的提醒个数
    notification.applicationIconBadgeNumber++;
     
    // 设定通知的userInfo,用来标识该通知
    NSMutableDictionary *aUserInfo = [[NSMutableDictionary alloc] init];
    aUserInfo[kLocalNotificationID] = @"LocalNotificationID";
    notification.userInfo = aUserInfo;
     
    // 将通知添加到系统中
    [[UIApplication sharedApplication] scheduleLocalNotification:notification];
}

上面的alertBody是设备收到本地通知时横额或锁屏时的主要文字内容,alertActions是锁屏时显示的slide to后面的文字内容。例如:

 

\\

 

repeatInterval表示通知的重复间隔,在SDK中定义如下:

<喎?"http://www.2cto.com/kf/ware/vc/" target="_blank" class="keylink">vcD4KPHByZSBjbGFzcz0="brush:java;">@property(nonatomic) NSCalendarUnit repeatInterval; // 0 means don‘t repeat
其取值主要有:

 

 

?
1
2
3
4
5
6
7
8
9
NSCalendarUnitEra                = kCFCalendarUnitEra,
NSCalendarUnitYear               = kCFCalendarUnitYear,
NSCalendarUnitMonth              = kCFCalendarUnitMonth,
NSCalendarUnitDay                = kCFCalendarUnitDay,
NSCalendarUnitHour               = kCFCalendarUnitHour,
NSCalendarUnitMinute             = kCFCalendarUnitMinute,
NSCalendarUnitSecond             = kCFCalendarUnitSecond,
NSCalendarUnitWeekday            = kCFCalendarUnitWeekday,
NSCalendarUnitWeekdayOrdinal     = kCFCalendarUnitWeekdayOrdinal,

分别表示一个世纪、一年、一个月等等,0表示不重复。具体可以查看CFCalendar Reference

 

repeatInterval的下限应该是NSCalendarUnitMinute,即每分钟重复发送一次通知。

如果设置为NSCalendarUnitSecond,那么消息不会重复,每秒发送一次通知,iOS系统当然不会容许这样的存在了。

这里比较不好的一点是该值不能自定义(很遗憾,NSCalendarUnit是个枚举类型),例如你不能塞个10.0给它从而希望它每十秒重复一次。所以如果你想每20分钟发送一次通知,一小时内发送3次,那么只能同时设定三个通知了。

 

 

上面的代码运行后,5秒钟之后就可以收到一个本地通知。

在收到通知后,调用程序委托中的下列方法处理:

 

?
1
2
3
4
5
6
-(void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification{
    NSLog(@"Application did receive local notifications");
     
    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Hello" message:@"welcome" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil, nil];
    [alert show];
}

注意这个方法只有在程序启动之后才会执行,因此当程序处于后台时,该方法不会执行。

 

 

有一点需要注意,如果我们的应用程序给系统发送的本地通知是周期性的,那么即使把程序删了重装,之前的本地通知在重装时依然存在(没有从系统中移除)。例如,我们在viewDidLoad方法中启动添加本地通知的方法,多跑几次,然后把程序在模拟器中删除,再重新跑,并用下列方法输出所有的本地通知:

 

?
1
2
NSArray *localNotifications = [[UIApplication sharedApplication] scheduledLocalNotifications];
NSLog(@"%@", localNotifications);

控制台输出:

 

 

?
1
2
3
4
5
6
7
8
2014-03-14 15:46:37.145 LocalNotificationDemo[4419:60b] (
    "<uiconcretelocalnotification: 0xa32ce30="">{fire date = Friday, March 14, 2014 at 3:38:16 PM China Standard Time, time zone = Asia/Chongqing (GMT+8) offset 28800, repeat interval = NSDayCalendarUnit, repeat count = UILocalNotificationInfiniteRepeatCount, next fire date = Saturday, March 15, 2014 at 3:38:16 PM China Standard Time, user info = {\n    ClockID = LocalNotificationID;\n}}",
    "<uiconcretelocalnotification: 0xa32dfc0="">{fire date = Friday, March 14, 2014 at 3:44:45 PM China Standard Time, time zone = Asia/Chongqing (GMT+8) offset 28800, repeat interval = NSDayCalendarUnit, repeat count = UILocalNotificationInfiniteRepeatCount, next fire date = Saturday, March 15, 2014 at 3:44:45 PM China Standard Time, user info = {\n    ClockID = LocalNotificationID;\n}}",
    "<uiconcretelocalnotification: 0xa32e470="">{fire date = Friday, March 14, 2014 at 3:44:55 PM China Standard Time, time zone = Asia/Chongqing (GMT+8) offset 28800, repeat interval = NSDayCalendarUnit, repeat count = UILocalNotificationInfiniteRepeatCount, next fire date = Saturday, March 15, 2014 at 3:44:55 PM China Standard Time, user info = {\n    ClockID = LocalNotificationID;\n}}",
    "<uiconcretelocalnotification: 0xa32e950="">{fire date = Friday, March 14, 2014 at 3:45:13 PM China Standard Time, time zone = Asia/Chongqing (GMT+8) offset 28800, repeat interval = NSDayCalendarUnit, repeat count = UILocalNotificationInfiniteRepeatCount, next fire date = Saturday, March 15, 2014 at 3:45:13 PM China Standard Time, user info = {\n    ClockID = LocalNotificationID;\n}}",
    "<uiconcretelocalnotification: 0xa32edb0="">{fire date = Friday, March 14, 2014 at 3:45:29 PM China Standard Time, time zone = Asia/Chongqing (GMT+8) offset 28800, repeat interval = NSDayCalendarUnit, repeat count = UILocalNotificationInfiniteRepeatCount, next fire date = Saturday, March 15, 2014 at 3:45:29 PM China Standard Time, user info = {\n    ClockID = LocalNotificationID;\n}}",
    "<uiconcretelocalnotification: 0xa32e870="">{fire date = Friday, March 14, 2014 at 3:46:28 PM China Standard Time, time zone = Asia/Chongqing (GMT+8) offset 28800, repeat interval = NSDayCalendarUnit, repeat count = UILocalNotificationInfiniteRepeatCount, next fire date = Saturday, March 15, 2014 at 3:46:28 PM China Standard Time, user info = {\n    ClockID = LocalNotificationID;\n}}"
)</uiconcretelocalnotification:></uiconcretelocalnotification:></uiconcretelocalnotification:></uiconcretelocalnotification:></uiconcretelocalnotification:></uiconcretelocalnotification:>

可以看到之前发送的本地通知一直滞留在系统中。

 

不只是模拟器,在iOS设备上也是这样,博主之前的App在设备上重装时以前的本地通知会继续发送。

因此我们需要取消通知的方法,当然该对象也会在scheduledLocalNotifications数组中移除。

取消方法分为两种。

第一种比较暴力,直接取消所有的本地通知:

 

?
1
[[UIApplication sharedApplication] cancelAllLocalNotifications];

这个适合在App重装时第一次启动的时候,或还原程序默认设置等场合下使用。

 

第二种方法是针对某个特定通知的:

 

?
1
- (void)cancelLocalNotification:(UILocalNotification *)notification NS_AVAILABLE_IOS(4_0);

这时就需要通知有一个标识,这样我们才能定位是哪一个通知。可以在notification的userInfo(一个字典)中指定。

 

例如:

 

?
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
-(void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification{
    NSLog(@"Application did receive local notifications");
     
    // 取消某个特定的本地通知
    for (UILocalNotification *noti in [[UIApplication sharedApplication] scheduledLocalNotifications]) {
        NSString *notiID = noti.userInfo[kLocalNotificationID];
        NSString *receiveNotiID = notification.userInfo[kLocalNotificationID];
        if ([notiID isEqualToString:receiveNotiID]) {
            [[UIApplication sharedApplication] cancelLocalNotification:notification];
            return;
        }
    }
     
    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Hello" message:@"welcome" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil, nil];
    [alert show];
}


 

最后建议本地通知不要发得太频繁,不然用户会觉得非常的烦

 

 

转载自:http://blog.csdn.net/l_ch_g/article/details/8767402

 

 

  1. 第一步:创建本地推送  
  2. // 创建一个本地推送  
  3. UILocalNotification *notification = [[[UILocalNotification alloc] init] autorelease];  
  4. //设置10秒之后  
  5. NSDate *pushDate = [NSDate dateWithTimeIntervalSinceNow:10];  
  6. if (notification != nil) {  
  7. // 设置推送时间  
  8.     notification.fireDate = pushDate;  
  9. // 设置时区  
  10.     notification.timeZone = [NSTimeZone defaultTimeZone];  
  11. // 设置重复间隔  
  12.     notification.repeatInterval = kCFCalendarUnitDay;  
  13. // 推送声音  
  14.     notification.soundName = UILocalNotificationDefaultSoundName;  
  15. // 推送内容  
  16.     notification.alertBody = @"推送内容";  
  17. //显示在icon上的红色圈中的数子  
  18.     notification.applicationIconBadgeNumber = 1;  
  19. //设置userinfo 方便在之后需要撤销的时候使用  
  20.     NSDictionary *info = [NSDictionary dictionaryWithObject:@"name"forKey:@"key"];  
  21.     notification.userInfo = info;  
  22. //添加推送到UIApplication         
  23.     UIApplication *app = [UIApplication sharedApplication];  
  24.     [app scheduleLocalNotification:notification];   
  25. }  
  26. 第二步:接收本地推送  
  27. - (void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification*)notification{  
  28.     UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"iWeibo" message:notification.alertBody delegate:nil cancelButtonTitle:@"确定" otherButtonTitles:nil];  
  29.     [alert show];  
  30. // 图标上的数字减1  
  31.     application.applicationIconBadgeNumber -= 1;  
  32. }  
  33. 第三步:解除本地推送  
  34. // 获得 UIApplication  
  35. UIApplication *app = [UIApplication sharedApplication];  
  36. //获取本地推送数组  
  37. NSArray *localArray = [app scheduledLocalNotifications];  
  38. //声明本地通知对象  
  39. UILocalNotification *localNotification;  
  40. if (localArray) {  
  41. for (UILocalNotification *noti in localArray) {  
  42.         NSDictionary *dict = noti.userInfo;  
  43. if (dict) {  
  44.             NSString *inKey = [dict objectForKey:@"key"];  
  45. if ([inKey isEqualToString:@"对应的key值"]) {  
  46. if (localNotification){  
  47.                     [localNotification release];  
  48.                     localNotification = nil;  
  49.                 }  
  50.                 localNotification = [noti retain];  
  51. break;  
  52.             }  
  53.         }  
  54.     }  
  55. //判断是否找到已经存在的相同key的推送  
  56. if (!localNotification) {  
  57. //不存在初始化  
  58.         localNotification = [[UILocalNotification alloc] init];  
  59.     }  
  60. if (localNotification) {  
  61. //不推送 取消推送  
  62.         [app cancelLocalNotification:localNotification];  
  63.         [localNotification release];  
  64. return;  
  65.     }  

ios推送:本地通知UILocalNotification