Question

我想每周晚上10点（不论国家/地区）发出通知。我需要使用timeZone吗？目前我使用下面的代码来解雇每周的通知，但是如何在晚上10点准确发布通知。

NSDate *date = [NSDate date];
NSDate* myNewDate = [date dateByAddingTimeInterval:7*24*60*60];    
UILocalNotification *localNotification = [[UILocalNotification alloc] init];
localNotification.fireDate = myNewDate;
localNotification.timeZone = [NSTimeZone defaultTimeZone];
localNotification.repeatInterval = NSWeekCalendarUnit;
[[UIApplication sharedApplication] scheduleLocalNotification:localNotification];
[localNotification release];

Answer 1

我认为将fireDate设置为您想要收到通知的那天的22:00（而不是“从现在开始的一周”）可以满足您的需求。您可能希望使用NSCalendar来执行此操作。

NSDateComponents *dateComponents = [[NSDateComponents alloc] init];
NSDate *currentDate = [NSDate date];
NSDate *fireDate = nil;

[dateComponents setDay:3];  // ...or whatever day.
[dateComponents setHour:22];
[dateComponents setMinute:0];

fireDate = [gregorian dateByAddingComponents:dateComponents
                                      toDate:currentDate 
                                     options:0];

[localNotification setFireDate:fireDate];
[dateComponents release];

Answer 2

我做了这些修改并且有效......

NSDateComponents *dateComponents = [[NSDateComponents alloc] init];
NSDate *currentDate = [NSDate date];
NSDate *fireDate = nil;

//Getting current Hour
NSDateComponents *components = [[NSCalendar currentCalendar] components:(kCFCalendarUnitHour | kCFCalendarUnitMinute) fromDate:currentDate];
NSInteger hour = [components hour];
NSInteger minute = [components minute];

[dateComponents setDay:7];//After 1 week
[dateComponents setHour:22-hour-1];  //Calculating Remaining time for 10PM && "-1" because i am adding 60 min
[dateComponents setMinute:60-minute];

//Adding remaining time to current Time
fireDate = [[NSCalendar currentCalendar] dateByAddingComponents:dateComponents
                                              toDate:currentDate 
                                             options:0];
[localNotification setFireDate:fireDate];

特定时间iPhone本地通知

2 个答案: