根据时间戳转化成对应的时间

- (void)viewDidLoad {

    [superviewDidLoad];

    // Do any additional setup after loading the view, typically from a nib.

    

    NSString *str =  [selfdateStringWithstring:@"1454601600000"];

   NSLog(@"%@",str);

}

//1454601600000

- (NSString *)dateStringWithstring:(NSString *)dateString

{

   NSLog(@"---%@",dateString);

    NSDateFormatter* formatter = [[NSDateFormatteralloc] init];

    formatter.timeZone = [NSTimeZonetimeZoneWithName:@"beijing"];

    

    [formatter setDateStyle:NSDateFormatterMediumStyle];

    [formatter setTimeStyle:NSDateFormatterShortStyle];

    [formattersetDateFormat:@"yyyy.MM.dd"];// yyyy 使用小写

   float a = [dateString doubleValue]/1000;// 建议使用 doubleValue 类型

    NSDate* date = [NSDatedateWithTimeIntervalSince1970:a];

   return [formatter stringFromDate:date];

    

}