我有一个计划缓存存储在NSDictionary中。
对于下面的示例，我的计划时间为 2012年1月13日2:00 PM 和 2012年1月13日2:05 PM 。如何将两者都添加到队列中以自行触发？
构建计划缓存:
-(void) buildScheduleCache
{
NSCalendarDate *now = [NSCalendarDate calendarDate];
NSFileManager *manager = [[NSFileManager defaultManager] autorelease];
path = @"/var/mobile/Library/MobileProfiles/Custom Profiles";
theProfiles = [manager directoryContentsAtPath:path];
myPrimaryinfo = [[NSMutableArray arrayWithCapacity:6] retain];
keys = [NSArray arrayWithObjects:@"Profile",@"MPSYear",@"MPSMonth",@"MPSDay",@"MPSHour",@"MPSMinute",nil];
for (NSString *profile in theProfiles)
{
plistDict = [[[NSMutableDictionary alloc] initWithContentsOfFile:[NSString stringWithFormat:@"%@/%@",path,profile]] autorelease];
[myPrimaryinfo addObject:[NSDictionary dictionaryWithObjects:
[NSArray arrayWithObjects:
[NSString stringWithFormat:@"%@",profile],
[NSString stringWithFormat:@"%@",[plistDict objectForKey:@"MPSYear"]],
[NSString stringWithFormat:@"%@",[plistDict objectForKey:@"MPSMonth"]],
[NSString stringWithFormat:@"%@",[plistDict objectForKey:@"MPSDay"]],
[NSString stringWithFormat:@"%@",[plistDict objectForKey:@"MPSHour"]],
[NSString stringWithFormat:@"%@",[plistDict objectForKey:@"MPSMinute"]],
nil]forKeys:keys]];
profileSched =
[NSCalendarDate dateWithYear:[plistDict objectForKey:@"MPSYear"]
month:[plistDict objectForKey:@"MPSMonth"]
day:[plistDict objectForKey:@"MPSDay"]
hour:[plistDict objectForKey:@"MPSHour"]
minute:[plistDict objectForKey:@"MPSMinute"]
second:01
timeZone:[now timeZone]];
[self rescheduleTimer];
}
NSString *testPath = @"/var/mobile/Library/MobileProfiles/Schedules.plist";
[myPrimaryinfo writeToFile:testPath atomically:YES];
}
安排 Activity :
-(void) scheduleProfiles
{
NSFileManager *manager = [[NSFileManager defaultManager] autorelease];
path = @"/var/mobile/Library/WrightsCS/MobileProfiles/Custom Profiles";
theProfiles = [manager contentsOfDirectoryAtPath:path error:nil];
for (NSString *profile in theProfiles)
{
NSMutableDictionary * plistDict = [[[NSMutableDictionary alloc] initWithContentsOfFile:[NSString stringWithFormat:@"%@/%@",path,profile]] autorelease];
profileSched =
[NSCalendarDate dateWithYear:[[plistDict objectForKey:@"MPSYear"] intValue]
month:[[plistDict objectForKey:@"MPSMonth"] intValue]
day:[[plistDict objectForKey:@"MPSDay"] intValue]
hour:[[plistDict objectForKey:@"MPSHour"] intValue]
minute:[[plistDict objectForKey:@"MPSMinute"] intValue]
second:01
timeZone:[NSTimeZone localTimeZone]];
NSLog(@"DATE: %@ SCHEDULE: %@ PROFILE: %@",[NSDate date],profileSched,profile);
if([NSDate date] < profileSched)
{
NSLog(@"IGNORING PROFILE: %@ WITH SCHEDULE: %@",profile,profileSched);
}else{
//Create the timer from the Cached Array
schedTimer = [[NSTimer alloc] initWithFireDate:profileSched //[NSDate dateWithTimeIntervalSinceNow: 10]
interval:0.1f
target:self
selector:@selector(fireCustomProfile:)
userInfo:profile
repeats:NO];//[[plistDict objectForKey:@"MPSRepeat"] boolValue]];
MLogString(@"Scheduling Profile: %@",profile);
[[NSRunLoop currentRunLoop] addTimer:schedTimer forMode:NSDefaultRunLoopMode];
}
}
}
触发事件:
-(void)fireCustomProfile:(NSTimer *)timer
{
if([[NSDate date] earlierDate:[schedTimer fireDate]])
{
NSLog(@"Ignoring Profile: %@",[schedTimer userInfo]);
return;
}
notify_post("com.wrightscs.MobileProfiles.setCustomProfile");
}
事件示例:
<array>
<dict>
<key>MPSDay</key>
<string>13</string>
<key>MPSHour</key>
<string>21</string>
<key>MPSMinute</key>
<string>15</string>
<key>MPSMonth</key>
<string>1</string>
<key>MPSYear</key>
<string>2012</string>
<key>Profile</key>
<string>Event 1</string>
<key>Repeat</key>
<true/>
</dict>
</array>
<array>
<dict>
<key>MPSDay</key>
<string>13</string>
<key>MPSHour</key>
<string>21</string>
<key>MPSMinute</key>
<string>20</string>
<key>MPSMonth</key>
<string>1</string>
<key>MPSYear</key>
<string>2012</string>
<key>Profile</key>
<string>Event 2</string>
<key>Repeat</key>
<true/>
</dict>
</array>
最佳答案
您可以使用UILocalNotification代替NSTimer。局限性在于，没有您的交互，您的应用程序中就不会执行任何操作，但是即使该应用程序已关闭，也会触发一条通知。
Apple有关UILocalNotifications的文档:
UILocalNotification实例表示有关以下内容的通知:
应用程序可以安排在特定时间向用户展示
日期和时间。操作系统负责交付
通知在适当的时间；该应用程序不必
为实现这一目标而奔波。
...
当系统传递本地通知时，可以做几件事
是否发生取决于应用程序状态和类型
通知。如果应用程序不是最前端且不可见，则
系统显示警报消息，标记应用程序并播放
声音-通知中指定的内容。如果通知
是警报，用户点击操作按钮(或者，如果设备是
锁定，拖动以打开操作滑块)，将启动应用程序。在
application:didFinishLaunchingWithOptions:方法
委托可以从传入的对象中获取UILocalNotification对象
使用选项字典
UIApplicationLaunchOptionsLocalNotificationKey键。代表可以
检查通知的属性，如果有则检查
在其userInfo字典中包含自定义数据，它可以访问
数据并进行相应处理。另一方面，如果当地
通知仅标记应用程序图标，并且用户
响应启动应用程序，
application:didFinishLaunchingWithOptions:方法被调用，但是没有
UILocalNotification对象包含在选项字典中。
如果应用程序是最重要的，并且在系统交付时可见
通知，不显示警报，没有图标标记，也没有声音
玩过的。但是，application:didReceiveLocalNotification:是
如果应用程序委托实现，则调用此方法。的
UILocalNotification实例被传递到此方法中，并且
委托可以检查其属性或从中访问任何自定义数据
userInfo字典。
您可以找到一个很好的教程here，其主要思想如下:
通知设置:
Class cls = NSClassFromString(@"UILocalNotification");
if (cls != nil) {
UILocalNotification *notif = [[cls alloc] init];
notif.fireDate = [datePicker date];
notif.timeZone = [NSTimeZone defaultTimeZone];
notif.alertBody = TEXT;
notif.alertAction = LAUNCH_BUTTON;
notif.soundName = UILocalNotificationDefaultSoundName;
notif.applicationIconBadgeNumber = NOTIFICATIONS_REMAINING;
NSDictionary *userDict = [NSDictionary dictionaryWithObject:CUSTOM_INFO
forKey:kRemindMeNotificationDataKey];
notif.userInfo = userDict;
[[UIApplication sharedApplication] scheduleLocalNotification:notif];
[notif release];
}
当应用程序未运行时(在应用程序委托中)处理修饰符:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
Class cls = NSClassFromString(@"UILocalNotification");
if (cls) {
UILocalNotification *notification = [launchOptions objectForKey:
UIApplicationLaunchOptionsLocalNotificationKey];
if (notification) {
NSString *reminderText = [notification.userInfo
objectForKey:kRemindMeNotificationDataKey];
[viewController showReminder:reminderText];
}
}
application.applicationIconBadgeNumber = NOTIFICATIONS_REMAINING_LESS_ONE;
[window addSubview:viewController.view];
[window makeKeyAndVisible];
return YES;
}
前台应用程序(在应用程序委托中):
- (void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification {
UIApplicationState state = [application applicationState];
if (state == UIApplicationStateInactive) {
// Application was in the background when notification
// was delivered.
}
}
关于objective-c - 使用NSTimer安排多个日常事件？，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/2632996/