如何在Objective-C中将DateFormatter更改为timeStamp？

Question

例如，我想将NSDateFormatter对象更改为“YYYY-MM-dd HH：mm”到时间戳，是否有人有好主意？

Answer 1

首先将日期字符串转换为NSDate，然后使用timeIntervalSince1970获取时间戳。

NSString *dateString = @"2016-10-12 10:30";
NSDateFormatter *inputFormatter = [[NSDateFormatter alloc] init];
[inputFormatter setDateFormat:@"yyyy-MM-dd HH:mm"];

NSDate *formattedDate = [inputFormatter dateFromString: dateString];

NSTimeInterval timestamp = [formattedDate timeIntervalSince1970];

Answer 2

使用timeIntervalSince1970。试试吧：

NSString *mydateString = @"2010-7-5 1:39";
NSDateFormatter *Df = [[NSDateFormatter alloc] init];
[Df setDateFormat:@"yyyy-MM-dd HH:mm"];
[Df setLocale:[[NSLocale alloc] initWithLocaleIdentifier:@"en_US_POSIX"]];   

NSDate *formattedDate = [Df dateFromString: mydateString];

NSTimeInterval mYtimestamp = [formattedDate timeIntervalSince1970];

NSLog(@"Hello my time: %f--",mYtimestamp);
// To get it back:
NSTimeInterval _interval=mYtimestamp;
NSDate *date = [NSDate dateWithTimeIntervalSince1970:_interval];
NSDateFormatter *formatter= [[NSDateFormatter alloc] init];
[formatter setLocale:[NSLocale currentLocale]];
[formatter setDateFormat:@"yyyy-MM-dd HH:mm"];
NSString *dateString = [formatter stringFromDate:date];

NSLog(@"date again-:%@",dateString);