NSDate - 提取时间

发布于 2024-11-30 23:48:01 字数 782 浏览 1 评论 0原文

问题

我有一个时间戳，我正在将其转换为NSDate。现在我需要提取时间。我已成功提取时间，但唯一的问题是，如果分钟为 0，则显示“0”而不是“00”。因此 11:00 将显示为：“11:0”。其他一切正常，例如 11:30 正常。

代码

    NSDate *date = [NSDate dateWithTimeIntervalSince1970:[self.program.sd intValue]];
    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
    [dateFormatter setDateFormat:@"HH:mm"];
    NSCalendar *calendar = [NSCalendar currentCalendar];
    NSDateComponents *components = [calendar components:(kCFCalendarUnitHour | kCFCalendarUnitMinute) fromDate:date];
    NSInteger hour = [components hour];
    NSInteger minute = [components minute];
    NSLog(@"%d:%d", hour, minute);

有什么建议吗？我做错了什么？有没有比我上面所做的更好的方法来同时提取小时和分钟？

谢谢！

原文

Problem

I have a timestamp that I am converting to an NSDate. Now I need to extract the time. I have successfully extracted the time but the only problem I have is that if the minutes are 0, it displays "0" instead of "00". So 11:00 would be shown as: "11:0". Everything else works, for example 11:30 works fine.

Code

    NSDate *date = [NSDate dateWithTimeIntervalSince1970:[self.program.sd intValue]];
    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
    [dateFormatter setDateFormat:@"HH:mm"];
    NSCalendar *calendar = [NSCalendar currentCalendar];
    NSDateComponents *components = [calendar components:(kCFCalendarUnitHour | kCFCalendarUnitMinute) fromDate:date];
    NSInteger hour = [components hour];
    NSInteger minute = [components minute];
    NSLog(@"%d:%d", hour, minute);

Any suggestions? What have I done wrong? Is there a better way to extract both the hour and the minute at the same time rather than what I've done above?

Thanks!

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十秒萌定你 2024-12-07 23:48:01

您是否恢复了正确的价值观？如果您所做的只是向用户显示时间，则应使用 NSDateFormatter 从日期对象创建字符串。

NSDateFormatter *formatter = [[NSDateFormatter new] autorelease];
[formatter setDateFormat:@"hh:mm"];
NSString *timeString = [formatter stringFromDate:date];

格式字符串的可能性记录在 UTS #35：区域设置数据标记语言附录 F：日期格式模式。

Are you getting the right values back? If all you're doing is displaying the time to the user, you should use NSDateFormatter to create a string from the date object.

NSDateFormatter *formatter = [[NSDateFormatter new] autorelease];
[formatter setDateFormat:@"hh:mm"];
NSString *timeString = [formatter stringFromDate:date];

Possibilities for format strings are documented in UTS #35: Locale Data Markup Language Appendix F: Date Format Patterns.

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