iOS時間類型轉換和各種數據類型進行轉換

jopen 9年前發布 | 1K 次閱讀 Objective-C IOS
這次分享一些數據類型還有時間類型的各種轉換方法，有詳細注釋，話不多說，直接上代碼
/**

時間轉換部分

//從1970年開始到現在經過了多少秒
-(NSString )getTimeSp
{
NSString time;
NSDate fromdate=[NSDate date];
time = [NSString stringWithFormat:@"%f",[fromdate timeIntervalSince1970]];
return time;
}
//將時間戳轉換成NSDate,轉換的時間我也不知道是哪國時間,應該是格林尼治時間
-(NSDate )changeSpToTime:(NSString)spString
{
NSDate *confromTimesp = [NSDate dateWithTimeIntervalSince1970:[spString intValue]];
NSLog(@"%@",confromTimesp);
return confromTimesp;
}
//將時間戳轉換成NSDate,加上時區偏移。這個轉換之后是北京時間
-(NSDate)zoneChange:(NSString)spString
{
NSDate confromTimesp = [NSDate dateWithTimeIntervalSince1970:[spString intValue]];
NSTimeZone zone = [NSTimeZone systemTimeZone];
NSInteger interval = [zone secondsFromGMTForDate:confromTimesp];
NSDate *localeDate = [confromTimesp  dateByAddingTimeInterval: interval];
NSLog(@"%@",localeDate);
return localeDate;
}
//比較給定NSDate與當前時間的時間差，返回相差的秒數
-(long)timeDifference:(NSDate )date
{
NSDate localeDate = [NSDate date];
long difference =fabs([localeDate timeIntervalSinceDate:date]);
return difference;
}
//將NSDate按yyyy-MM-dd HH:mm:ss格式時間輸出
-(NSString)nsdateToString:(NSDate )date
{
NSDateFormatter dateFormat=[[NSDateFormatter alloc]init];
[dateFormat setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
NSString string=[dateFormat stringFromDate:date];
NSLog(@"%@",string);
return string;
}
//將yyyy-MM-dd HH:mm:ss格式時間轉換成時間戳
-(long)changeTimeToTimeSp:(NSString )timeStr
{
long time;
NSDateFormatter format=[[NSDateFormatter alloc] init];
[format setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
NSDate *fromdate=[format dateFromString:timeStr];
time= (long)[fromdate timeIntervalSince1970];
NSLog(@"%ld",time);
return time;
}
//獲取當前系統的yyyy-MM-dd HH:mm:ss格式時間
-(NSString )getTime
{
NSDate fromdate=[NSDate date];
NSDateFormatter dateFormat=[[NSDateFormatter alloc]init];
[dateFormat setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
NSString string=[dateFormat stringFromDate:fromdate];
return string;
}
//將當前時間轉化為年月日格式
-(NSString )changeDate
{
NSDate date = [NSDate date];
NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
NSInteger unitFlags =  NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit | NSWeekdayCalendarUnit |
NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit;
NSDateComponents *comps = [calendar components:unitFlags fromDate:date];
NSInteger year = [comps year];
NSInteger month = [comps month];
NSInteger day = [comps day];
NSInteger hour = [comps hour];
NSInteger min = [comps minute];
NSInteger sec = [comps second];
NSString *string = [NSString stringWithFormat:@"%d年%d月%d日%d時%d分%d秒",year,month,day,hour,min,sec];
NSLog(@"%@",string);
return string;
}
*/


//發送數據時,16進制數－>Byte數組->NSData,加上校驗碼部分
-(NSData )hexToByteToNSData:(NSString )str
{
    int j=0;
    Byte bytes[[str length]/2];                         ////Byte數組即字節數組,類似于C語言的char[],每個漢字占兩個字節，每個數字或者標點、字母占一個字節
    for(int i=0;i<[str length];i++)
    {
        /**

     *  在iphone/mac開發中，unichar是兩字節長的char，代表unicode的一個字符。
     *  兩個單引號只能用于char。可以采用直接寫文字編碼的方式來初始化。采用下面方法可以解決多字符問題
     */
    int int_ch;                                     ///兩位16進制數轉化后的10進制數
    unichar hex_char1 = [str characterAtIndex:i];   ////兩位16進制數中的第一位(高位*16)

    int int_ch1;
    if(hex_char1 >= '0' && hex_char1 <='9')
    {
        int_ch1 = (hex_char1-48)*16;                //// 0 的Ascll - 48
    }
    else if(hex_char1 >= 'A' && hex_char1 <='F')
    {
        int_ch1 = (hex_char1-55)*16;                //// A 的Ascll - 65
    }
    else
    {
        int_ch1 = (hex_char1-87)*16;                //// a 的Ascll - 97
    }

    i++;

    unichar hex_char2 = [str characterAtIndex:i];   ///兩位16進制數中的第二位(低位)
    int int_ch2;
    if(hex_char2 >= '0' && hex_char2 <='9')
    {
        int_ch2 = (hex_char2-48);                   //// 0 的Ascll - 48
    }
    else if(hex_char2 >= 'A' && hex_char2 <='F')
    {
        int_ch2 = hex_char2-55;                     //// A 的Ascll - 65
    }
    else
    {
        int_ch2 = hex_char2-87;                     //// a 的Ascll - 97
    }

    int_ch = int_ch1+int_ch2;
    bytes[j] = int_ch;                              ///將轉化后的數放入Byte數組里


//        if (j==[str length]/2-2) {
//            int k=2;
//            int_ch=bytes[0]^bytes[1];
//            while (k
//                int_ch=int_ch^bytes[k];
//                k++;
//            }
//            bytes[j] = int_ch;
//        }

    j++;
}
NSData *newData = [[NSData alloc] initWithBytes:bytes length:[str length]/2 ];
NSLog(@"%@",newData);
return newData;

}
//接收數據時,NSData－>Byte數組->16進制數
-(NSString )NSDataToByteTohex:(NSData )data
{
    Byte bytes = (Byte )[data bytes];
    NSString hexStr=@"";
    for(int i=0;i<[data length];i++)
    {
        NSString newHexStr = [NSString stringWithFormat:@"%x",bytes[i]&0xff];///16進制數,與 0xff 做 & 運算會將 byte 值變成 int 類型的值，也將 -128～0 間的負值都轉成正值了。
        if([newHexStr length]==1)
        {
            hexStr = [NSString stringWithFormat:@"%@0%@",hexStr,newHexStr];
        }
        else
        {
            hexStr = [NSString stringWithFormat:@"%@%@",hexStr,newHexStr];
        }
    }
    NSLog(@"hexStr:%@",hexStr);
    return hexStr;
}
//將漢字字符串轉換成16進制字符串
-(NSString )chineseToHex:(NSString)chineseStr
{
    NSStringEncoding encodingGB18030= CFStringConvertEncodingToNSStringEncoding(kCFStringEncodingGB_18030_2000);
    NSData responseData =[chineseStr dataUsingEncoding:encodingGB18030 ];
    NSString string=[self NSDataToByteTohex:responseData];
    NSLog(@"%@",string);
    return string;
}
//將漢字字符串轉換成UTF8字符串
-(NSString )chineseToUTf8Str:(NSString)chineseStr
{
    NSStringEncoding encodingUTF8 = NSUTF8StringEncoding;
    NSData responseData2 =[chineseStr dataUsingEncoding:encodingUTF8 ];
    NSString string=[self NSDataToByteTohex:responseData2];
    return string;
}
//將十六進制字符串轉換成漢字
-(NSString)changeLanguage:(NSString)chinese
{
    NSString strResult;
    NSLog(@"chinese:%@",chinese);
    if (chinese.length%2==0)
    {
        //第二次轉換
        NSData newData = [self hexToByteToNSData:chinese];
        unsigned long encode = CFStringConvertEncodingToNSStringEncoding(kCFStringEncodingGB_18030_2000);
        strResult = [[NSString alloc] initWithData:newData encoding:encode];
        NSLog(@"strResult:%@",strResult);
    }
    else
    {
        NSString strResult = @"已假定是漢字的轉換，所傳字符串的長度必須是4的倍數!";
        NSLog(@"%@",strResult);
        return NULL;
    }
    return strResult;
}
/////////////GBK,漢字，GB2312,ASCII碼，UTF8,UTF16
//UTF8字符串轉換成漢字
-(NSString)changeLanguageUTF8:(NSString)chinese
{
    NSString strResult;
    NSData data=[self hexToByteToNSData:chinese];
    strResult=[[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding];
    return strResult;
}
//將十進制數轉換成十六進制
-(NSString )ToHex:(int)tmpid
{
    NSString nLetterValue;
    NSString str =@"";
    long long int ttmpig;
    for (int i = 0; i<9; i++)
    {
        ttmpig=tmpid%16;
        tmpid=tmpid/16;
        switch (ttmpig)
        {
            case 10:
                nLetterValue =@"A";break;
            case 11:
                nLetterValue =@"B";break;
            case 12:
                nLetterValue =@"C";break;
            case 13:
                nLetterValue =@"D";break;
            case 14:
                nLetterValue =@"E";break;
            case 15:
                nLetterValue =@"F";break;
            default:nLetterValue=[[NSString alloc]initWithFormat:@"%lli",ttmpig];

    }
    str = [nLetterValue stringByAppendingString:str];
    if (tmpid == 0)
    {
        break;
    }

}
return str;

}
//Unicode轉化為漢字

(NSString )replaceUnicode1:(NSString )unicodeStr
{
  NSString tempStr1 = [unicodeStr stringByReplacingOccurrencesOfString:@"\u" withString:@"\U"];
  NSString tempStr2 = [tempStr1 stringByReplacingOccurrencesOfString:@"\"" withString:@"\\""];
  NSString tempStr3 = [[@"\"" stringByAppendingString:tempStr2] stringByAppendingString:@"\""];
  NSData tempData = [tempStr3 dataUsingEncoding:NSUTF8StringEncoding];
  NSString* returnStr = [NSPropertyListSerialization propertyListFromData:tempData

                                                     mutabilityOption:NSPropertyListImmutable
                                                               format:NULL
                                                     errorDescription:NULL];


NSLog(@"%@",[returnStr stringByReplacingOccurrencesOfString:@"\r\n" withString:@"\n"]);
return [returnStr stringByReplacingOccurrencesOfString:@"\r\n" withString:@"\n"];
}


//iso8859－1 到 unicode編碼轉換       iso8859-1字符編碼的一種
/*

(NSString )changeISO88591StringToUnicodeString:(NSString )iso88591String
{
  NSMutableString srcString = [[NSMutableString alloc]initWithString:iso88591String];
  [srcString replaceOccurrencesOfString:@"&" withString:@"&" options:NSLiteralSearch range:NSMakeRange(0, [srcString length])];
  [srcString replaceOccurrencesOfString:@"&#x" withString:@"" options:NSLiteralSearch range:NSMakeRange(0, [srcString length])];
  NSMutableString desString = [[NSMutableString alloc]init];
  NSArray *arr = [srcString componentsSeparatedByString:@";"];    //將字符串切割成數組
  for(int i=0;i<[arr count]-1;i++)
  {
  NSString *v = [arr objectAtIndex:i];
  char *c = malloc(3);
  int value = [StringUtil changeHexStringToDecimal:v];//將二進制轉化為十進制
  c[1] = value  &0x00FF;
  c[0] = value >>8 &0x00FF;
  c[2] = '\0';
  [desString appendString:[NSString stringWithCString:c encoding:NSUnicodeStringEncoding]];
  free(c);

  }
  return desString;
}
*/
</pre>
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Objective-C IOS
iOS時間類型轉換和各種數據類型進行轉換

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