UILocalNotification闹钟本地提醒

闹钟的话 要入住系统队列的，你可以通过设置本地消息给系统实现闹钟的效果，时间可以是一次性的，可以是周期性的，具体可以看看文档。

UILocalNotification *notification=[[UILocalNotification alloc] init];
if (notification!=nil)
{
    NSDate *now=[NSDate new];
    notification.fireDate=[now addTimeInterval:20]; //s
    notification.timeZone=[NSTimeZone defaultTimeZone];
    notification.alertBody=@"hello";
    [[UIApplication sharedApplication] scheduleLocalNotification:notification];
}

notification.repeatInterval = NSWeekCalendarUnit;
可以看重复周期，每周，还是每天，还是每月，还是每年。。等等。

 UILocalNotification *notification=[[UILocalNotification alloc] init];
        if (notification!=nil) 
        {
            NSDate *now=[NSDate new];  
            //notification.fireDate=[now addTimeInterval:period];
            notification.fireDate = [now dateByAddingTimeInterval:period];
            NSLog(@"%d",period);
            notification.timeZone=[NSTimeZone defaultTimeZone];
            notification.soundName = @"ping.caf";
            //notification.alertBody=@"TIME！";
            notification.alertBody = [NSString stringWithFormat:@"@%时间到了!",nameStr];

            NSDictionary* info = [NSDictionary dictionaryWithObject:uniqueCodeStr forKey:CODE];
            notification.userInfo = info;

            [[UIApplication sharedApplication] scheduleLocalNotification:notification];      
        } 

设置的时间到了以后，会自动在桌面弹出一个提示框，点显示后，就可以启动软件。然后在

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    UILocalNotification *localNotif = [launchOptions objectForKey:UIApplicationLaunchOptionsLocalNotificationKey];
    if (localNotif) 
    {
        NSLog(@"Recieved Notification %@",localNotif);
        NSDictionary* infoDic = localNotif.userInfo;
        NSLog(@"userInfo description=%@",[infoDic description]);
        NSString* codeStr = [infoDic objectForKey:CODE];
    }
}

里，对lanchOptions进行处理，找到它里面的信息,就可以拿到设置时的需要处理的东西，就可以继续操作了。

如果此时你的客户端 软件仍在打开，则会调用

- (void)application:(UIApplication *)app didReceiveLocalNotification:(UILocalNotification *)notif
{

}

一样的处理方法。

闹钟所实现的基本功能：定时提醒

  //定义声音
CFBundleRef mainBundle;
mainBundle = CFBundleGetMainBundle ();

// Get the URL to the sound file to play
soundFileURLRef = CFBundleCopyResourceURL (
mainBundle,
CFSTR ("tap"),
CFSTR ("aif"),
NULL
);
//将nsstring转为cfstring

// Create a system sound object representing the sound file
AudioServicesCreateSystemSoundID
(
soundFileURLRef,
&soundFileObject
);//声音的绑定（类似数据库时用的数据库指针）

利用之前介绍的uidatepicker选取要提醒的时间

//计算多少秒后闹钟响应时间
int hm=(hs*3600)+(ms*60)-sec;
//建立后台消息对象
UILocalNotification *notification=[[UILocalNotification alloc] init];
if (notification!=nil)
{
notification.repeatInterval=NSDayCalendarUnit;
NSDate *now1=[NSDate new];
notification.fireDate=[now1 dateByAddingTimeInterval:hm];//距现在多久后触发代理方法
notification.timeZone=[NSTimeZone defaultTimeZone];
notification.soundName = @"tap.aif";
notification.alertBody = [NSString stringWithFormat:NSLocalizedString(@"你设置的时间是：%i ： %i .",nil),htime1 ,mtime1];
[[UIApplication sharedApplication] scheduleLocalNotification:notification];
[now1 release];
}

点击确定时触发此方法

-(void)notfacation{
//获取当前时间
sure=YES;
NSDate* now = [NSDate date];
NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
NSDateComponents *comps = [[NSDateComponents alloc] init];
NSInteger unitFlags = NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit | NSWeekdayCalendarUnit |
NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit;
comps = [calendar components:unitFlags fromDate:now];
hour = [comps hour];
min = [comps minute];

sec = [comps second];

htime1=[textField.text intValue];
mtime1=[textField1.text intValue];

hs=htime1-hour;
ms=mtime1-min;
//设置弹出框提醒用户
UIAlertView *at=[[UIAlertView alloc] initWithTitle:@"!"
message:[NSString stringWithFormat:@"你设置的时间： %i:%i ",htime1,mtime1]
delegate:nil cancelButtonTitle:@"确定" otherButtonTitles:@"关闭",nil];
[at setDelegate:self];
[at show];
[at release];
}

所设定的时间到了会触发此代理

//到时间时触发的代理
- (void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification
{
NSLog(@"123123123131231231++++++++++++");
AudioServicesPlaySystemSound (self.soundFileObject);

sure=NO;
UIApplicationState state = application.applicationState;

if (state == UIApplicationStateActive)
{
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"时间提醒"
message:notification.alertBody
delegate:self
cancelButtonTitle:@"确定"
otherButtonTitles:nil];
[alert show];
[alert release];
}
}