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ios推送:本地通知UILocalNotification
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:
?1234567891011121314151617181920212223242526272829// 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:?123456789NSCalendarUnitEra = 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 ReferencerepeatInterval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:
?123456-(
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:
?12NSArray *localNotifications = [[UIApplication sharedApplication] scheduledLocalNotifications];
NSLog(@
"%@"
, localNotifications);
控制台输出:?123456782014
-
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:
?12345678910111213141516-(
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
- 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;
- }
- }
ios推送:本地通知UILocalNotification