objective-c - 如何将本地化的日期字符串转换为 NSDate

Question

我有 NSString *localized_Date = minutesSinceMidnightToLocalizedTime （时间单位）

我在 4:30 am, 10.00pm 得到这个字符串

如何将此字符串转换为 NSDate？请告诉我。

Answer 1

NSDateFormatter 是你的朋友，使用适合你的日期/时间的格式

NSDateFormatter *df = [[[NSDateFormatter alloc] init] autorelease]; 
[df setDateFormat:[NSString stringWithFormat:@"dd MMM yyyy HH:mm"]]; 
NSDate *_date = [df dateFromString:string]; 

约翰

Answer 2

试试这个代码：

NSString *dateString = @"4:30 am";

NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];

[dateFormatter setDateFormat:@"hh:mm a"];

NSDate *date = [dateFormatter dateFromString:dateString];

希望这会帮助你。

Answer 3

我知道这是一个有点长的代码，但我想让它尽可能可读。此代码使用 minutesSinceMidnight 而不是本地化字符串。

NSDate *currentDate = [NSDate date];
NSDateComponents *currentDateComponents = [calendar components:NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit fromDate:currentDate];
NSDateComponents *currentDateToMidnight = [[NSDateComponents alloc] init];
[currentDateToMidnight setHour:-[currentDateComponents hour]];
[currentDateToMidnight setMinute:-[currentDateComponents minute]];
[currentDateToMidnight setSecond:-[currentDateComponents second]];
NSDate *midnight = [calendar dateByAddingComponents:currentDateToMidnight toDate:currentDate options:0];
NSDateComponents *midnightToDesiredDate = [[NSDateComponents alloc] init];
[midnightToDesiredDate setMinute:minutesSinceMidnight];
NSDate *desiredDate = [calendar dateByAddingComponents:midnightToDesiredDate toDate:midnight options:0];