Question

我需要设置几个fireDates。我想知道如何在特定的日期和时间设置闹钟？

Answer 1

NSDate *date = //set the date
NSTimer *timer = [NSTimer scheduledTimerWithTimeInterval:1000 target:target selector:@selector(aSelector) userInfo:userInfo repeats:NO];
[timer setFireDate:date];

或

NSDate *date = //set the date
NSTimer *timer = [[[NSTimer alloc] initWithFireDate::1000 target:target selector:@selector(aSelector) userInfo:userInfo repeats:NO] autorelease];
[timer setFireDate:date]; 
[[NSRunLoop currentRunLoop] addTimer:timer forMode:currentMode];

Answer 2

我知道这可能早就应该了，但是我的观点是：

NSDateComponents *dateComponents = [[NSDateComponents alloc] init];
[dateComponents setHour:13];
[dateComponents setMinute:0];
[dateComponents setSecond:0];
[dateComponents setDay:17];
[dateComponents setMonth:12];
[dateComponents setYear:2012];
NSCalendar *gregorian = [[NSCalendar alloc]
                     initWithCalendarIdentifier:NSGregorianCalendar];
NSDate *date = [gregorian dateFromComponents:components];

选中此选项以获得更好的参考https://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/DatesAndTimes/Articles/dtCalendars.html

为fireDate设置固定日期？ Xcode中

2 个答案: