OC将时间戳（毫秒）转换为天和小时

服务器返回的时间戳

- (NSString*)getOvertime:(NSString*)mStr{

    NSTimeInterval interval    =[mStr doubleValue] / 1000.0;

    NSDate *date              = [NSDate dateWithTimeIntervalSince1970:interval];

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

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

    NSString *dateString      = [formatter stringFromDate: date];

    NSLog(@"服务器返回的时间戳对应的时间是:%@",dateString);

    return dateString;

}