如何在iOS中设置闹钟？

Question

我知道这个问题已经问了很多次StackOverflow但我无法在我的应用程序中设置闹钟，因为我对iOS非常陌生？我下面这个教程设置闹钟：

Setting a reminder using UILocalNotification in iOS.

但是，它似乎并不为我工作。

我需要每天设置闹钟让我们说每天5.00 PM。我不能使用日期选择器来选择时间。

Answer 1

1. 首先您xib，（或者代码）设定的日期选择器模式：时间（默认为日期&时间）

2. 系统假定firedate是当前日期和时间用户选择的时间。这不是问题，因为您设置了重复间隔，因此它可以工作。我已经测试过它。

   UILocalNotification *localNotif = [[UILocalNotification alloc] init]; 
   [localNotif setFireDate:datePicker.date]; 
   [localNotif setRepeatInterval:NSDayCalendarUnit]; 
   [[UIApplication sharedApplication] scheduleLocalNotification:localNotif]; 
   

PS：这将是使用NSDateComponents类秒设置为0，以便设置报警，在您需要的分钟的第一秒响个好主意。您可以检查：你张贴在如何做到这一点

Local notifications in iOS.

教程。

Answer 2

您可能需要更改日期选择器的样式，以允许更改除日期以外的时间。

Answer 3

+ (void)addLocalNotification:(int)year:(int)month:(int)day:(int)hours:(int)minutes:(int)seconds:(NSString*)alertSoundName:(NSString*)alertBody:(NSString*)actionButtonTitle:(NSString*)notificationID 

调用此方法与参数，并使用此

+ (void)addLocalNotification:(int)year:(int)month:(int)day:(int)hours:(int)minutes:(int)seconds:(NSString*)alertSoundName:(NSString*)alertBody:(NSString*)actionButtonTitle:(NSString*)notificationID { 
NSCalendar *calendar = [NSCalendar autoupdatingCurrentCalendar]; 

//set the notification date/time 
NSDateComponents *dateComps = [[NSDateComponents alloc] init]; 
[dateComps setDay:day]; 

[dateComps setMonth:month]; 

[dateComps setYear:year]; 
[dateComps setHour:hours]; 

[dateComps setMinute:minutes]; 
[dateComps setSecond:seconds]; 

NSDate *notificationDate = [calendar dateFromComponents:dateComps]; 
[dateComps release]; 

UILocalNotification *localNotif = [[UILocalNotification alloc] init]; 
if (localNotif == nil) 
    return; 
localNotif.fireDate = notificationDate; 
localNotif.timeZone = [NSTimeZone defaultTimeZone]; 

// Set notification message 
localNotif.alertBody = alertBody; 
// Title for the action button 
localNotif.alertAction = actionButtonTitle; 

localNotif.soundName = (alertSoundName == nil) ? UILocalNotificationDefaultSoundName : alertSoundName; 

//use custom sound name or default one - look here to find out more: http://developer.apple.com/library/ios/#documentation/NetworkingInternet/Conceptual/RemoteNotificationsPG/IPhoneOSClientImp/IPhoneOSClientImp.html%23//apple_ref/doc/uid/TP40008194-CH103-SW13 

localNotif.applicationIconBadgeNumber += 1; //increases the icon badge number 

// Custom data - we're using them to identify the notification. comes in handy, in case we want to delete a specific one later 
NSDictionary *infoDict = [NSDictionary dictionaryWithObject:notificationID forKey:notificationID]; 
localNotif.userInfo = infoDict; 

// Schedule the notification 
[[UIApplication sharedApplication] scheduleLocalNotification:localNotif]; 
[localNotif release]; 
} 

Answer 4

你可以试试这个

UILocalNotification *todolistLocalNotification=[[UILocalNotification alloc]init]; 
[todolistLocalNotification setFireDate:[lodatepicker date]]; 
[todolistLocalNotification setAlertAction:@"Note list"]; 
[todolistLocalNotification setTimeZone:[NSTimeZone defaultTimeZone]]; 
[todolistLocalNotification setAlertBody:text_todolist]; 
[todolistLocalNotification setHasAction:YES];