iOS 时间戳转换为字符串

            

1、获取当前系统时间戳

                NSDate *currentDate = [NSDate date];

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

                [dateFormatter setDateFormat:@"YYYY-MM-dd HH:mm:ss"];

                NSString *dateString = [dateFormatter stringFromDate:currentDate];

2、

    NSString *timeStr = @“指定时间戳”;

    NSTimeInterval time = [timeStr doubleValue];

    NSDate *date = [NSDate dateWithTimeIntervalSince1970:time];

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

    [formatter setDateFormat:@"HH:mm"];

    self.timeLabel.text = [formatter stringFromDate:date];