Question

我从我的服务器获取日期字符串，如“10/4/2013 10:00:00 PM”。现在我只想在我的标签上显示几个小时。但问题是我使用的是以下代码但没有获得实际时间。

-(NSString*)convert:(NSString*)strdate
{

    NSDateFormatter * formatter = [[NSDateFormatter alloc] init];
    [formatter setTimeZone:[NSTimeZone timeZoneForSecondsFromGMT:0]];
    [formatter setLocale:[NSLocale systemLocale]];
   [formatter setDateFormat:@"dd/MM/yyyy HH:mm:ss a"];
    NSDate * date = [formatter dateFromString:strdate];


    NSDateFormatter* df = [[NSDateFormatter alloc]init];
    [df setDateFormat:@"hh:mm"];
    NSString *depResult = [df stringFromDate:date];

    NSLog(@"hours  %@ ", [df stringFromDate:date]);

    return depResult;
}

并将字符串输入作为“10/4/2013 9:00:00 PM”并输出为“05:30”。请更正我的位置我做错了。谢谢

Answer 1

+(NSString *)getDateStringFromDate :(NSDate *)date {
    NSDateFormatter * dateFormatter = [[NSDateFormatter alloc]init];
    [dateFormatter setDateFormat:@"dd/MM/yyyy hh:mm:ss a"];
    NSString *dateString = [dateFormatter stringFromDate:date];
    return dateString;
}

+(NSDate *)getDateFromDateString :(NSString *)dateString {
    NSDateFormatter * dateFormatter = [[NSDateFormatter alloc]init];
    [dateFormatter setDateFormat:@"dd/MM/yyyy hh:mm:ss a"];
    NSDate *date = [dateFormatter dateFromString:dateString];
    return date;
}

Answer 2

如果您有来自服务器的此日期"10/4/2013 9:00:00 pm"，

如果你想要的输出是02:24 AM

，你希望在印度时间也一样

然后你需要做这样的事情。

-(NSString*)convert:(NSString*)strdate
{

    NSDateFormatter * formatter = [[NSDateFormatter alloc] init];
    [formatter setTimeZone:[NSTimeZone timeZoneForSecondsFromGMT:0]];
    [formatter setLocale:[NSLocale systemLocale]];
    [formatter setDateFormat:@"dd/MM/yyyy hh:mm:ss a"];
    NSDate * date = [formatter dateFromString:strdate];


    NSDateFormatter* df = [[NSDateFormatter alloc]init];
    [df setDateFormat:@"hh:mm a"];
    NSString *depResult = [df stringFromDate:date];

    NSLog(@"hours  %@ ", [df stringFromDate:date]);

    return depResult;
}

Answer 3

使用以下代码：

- (NSString *)convert:(NSString *)strdate
{
    NSDateFormatter * formatter = [[NSDateFormatter alloc] init];
    [formatter setTimeZone:[NSTimeZone timeZoneForSecondsFromGMT:0]];
    [formatter setLocale:[NSLocale localeWithLocaleIdentifier:@"en_US_POSIX"]];
    [formatter setDateFormat:@"dd/MM/yyyy hh:mm:ss a"];
    NSDate * date = [formatter dateFromString:strdate];


    NSDateFormatter * df = [[NSDateFormatter alloc] init];
    [df setTimeZone:[NSTimeZone timeZoneForSecondsFromGMT:0]];
    [formatter setLocale:[NSLocale localeWithLocaleIdentifier:@"en_US_POSIX"]];
    [df setDateFormat:@"hh:mm"];
    NSString * depResult = [df stringFromDate:date];

    NSLog(@"hours  %@ ", [df stringFromDate:date]);

    return depResult;
}

在iOS中从字符串转换日期？

3 个答案: