Question

我在格式化程序的帮助下将此日期字符串"05/20/2015 05:27 pm"转换为NSDate，但它返回nil。

-(NSDate *)dateFromString:(NSString *)strDate withFormat:(NSString *)strDateFormat
{
NSDate *date = nil;

[self.dateFormatter setTimeZone:[NSTimeZone localTimeZone]];
if (strDate) {
    if (strDateFormat) {
        [self.dateFormatter setDateFormat:strDateFormat];

    }

    date = [self.dateFormatter dateFromString:strDate];

}
return  date;
}

我正在使用上面的函数，我将字符串"05/20/2015 05:27 pm"传递给格式@"dd/MM/yyyy HH:mm:ss"。

Answer 1

NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"mm/dd/yyyy hh:mm a"];
[dateFormatter setTimeZone:[NSTimeZone systemTimeZone]];
NSDate *stringDate = [dateFormatter dateFromString:@"05/20/2015 05:27 pm"];
NSLog(@"%@", stringDate);

Answer 2

-(NSDate *)dateFromString:(NSString *)strDate withFormat:(NSString *)strDateFormat
{
    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
    [dateFormatter setDateFormat:strDateFormat];

    [dateFormatter setTimeZone:[NSTimeZone systemTimeZone]];
    NSDate *date = [dateFormatter dateFromString:strDate];
    return date;

}

Answer 3

NSString *dateStr = @"05/20/2015 05:27 pm";

// Convert string to date object

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

[dateFormat setDateFormat:@"dd-MM-yyyy HH:mm:ss Z"];

NSDate *date = [dateFormat dateFromString:dateStr]; 

Nslog(@"%@",date);

Answer 4

要从NSDate转换为时间戳，您可以使用：

NSDate *date = [NSDate date];
NSTimeInterval timestampSeconds = [date timeIntervalSince1970];

结果将在几秒钟内完成。要将时间戳转换为标准毫秒，只需乘以1000。

Answer 5

timeIntervalSince1970

NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:@"mm/dd/yyyy hh:mm a"];
NSDate *strDate = [formatter dateFromString:@"05/20/2015 05:27 pm"];
NSLog(@"%@", strDate);//NSDate
time_t timeStamp = (time_t) [strDate  timeIntervalSince1970];
NSLog(@"%ld", timeStamp);//timestamp

How to convert NSDate into unix timestamp iphone sdk?

这可能对您有所帮助:)。

如何将日期字符串如“05/20/2015 05:27 pm”转换为NSDate，然后转换为时间戳

5 个答案: