ios – 使用SOAP使用WCF服务将图像从iPhone上传到服务器

base64binary只是base64编码的二进制数据.

1)使用以下代码片段将图像转换为二进制

NSData *binaryImageData  = UIImageJPEGRepresentation([UIImage imageNamed:@"Photo.png"],0.0);

2)将二进制编码为base64格式

这是我用来处理base64二进制和UIImage的类

@interface base64BinaryandImagehandler:NSObject
   +(NSString *) base64BinaryStringFromBinaryData: (NSData *)data length: (int)length;
   +(UIImage*)Base64BinaryToImage:(NSString *)Base64;
 @end


 @implementation base64BinaryandImagehandler:NSObject
      static char base64EncodingTable[64] = {
    'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z','a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z','0','1','2','3','4','5','6','7','8','9','+','/'
     };

 +(NSString *) base64BinaryStringFromBinaryData: (NSData *)data length: (int)length{          

 unsigned long ixtext,lentext;

    long ctremaining;

    unsigned char input[3],output[4];

    short i,charsonline = 0,ctcopy;

    const unsigned char *raw;

    NSMutableString *result;

    lentext = [data length];

    if (lentext < 1)
        return @"";

    result = [NSMutableString stringWithCapacity: lentext];

    raw = [data bytes];

    ixtext = 0;

    while (true) {

        ctremaining = lentext - ixtext;

        if (ctremaining <= 0)
            break;

        for (i = 0; i < 3; i++) {
            unsigned long ix = ixtext + i;
            if (ix < lentext)
                input[i] = raw[ix];
            else
                input[i] = 0;
        }

        output[0] = (input[0] & 0xFC) >> 2;

        output[1] = ((input[0] & 0x03) << 4) | ((input[1] & 0xF0) >> 4);

        output[2] = ((input[1] & 0x0F) << 2) | ((input[2] & 0xC0) >> 6);

        output[3] = input[2] & 0x3F;

        ctcopy = 4;

        switch (ctremaining) {
            case 1:
                ctcopy = 2;
                break;

            case 2:
                ctcopy = 3;
                break;
        }

        for (i = 0; i < ctcopy; i++)
            [result appendString: [NSString stringWithFormat: @"%c",base64EncodingTable[output[i]]]];

        for (i = ctcopy; i < 4; i++)
            [result appendString: @"="];

        ixtext += 3;

        charsonline += 4;

        if ((length > 0) && (charsonline >= length))
            charsonline = 0;
    }
    return result;
      }

  +(UIImage*)Base64BinaryToImage:(NSString *)Base64{      


        NSString* base64String=[[NSString alloc]initWithFormat:@"data:image/png;base64,%@",Base64];

       NSURL *base64url = [NSURL URLWithString:base64String];

       NSData *imageData = [NSData dataWithContentsOfURL:base64url];

       UIImage *img=[UIImage imageWithData:imageData];

      return img;
     }
 @end

这是将二进制转换为base64binary的方法

NSString *Base64Binary=[base64BinaryandImagehandler base64BinaryStringFromBinaryData:binaryImageData length:binaryImageData.length];

您还可以找到有关here的更多信息

这是C#中的base64编码和解码部分

public static string Base64Encode(string plainText) {
  var plainTextBytes = System.Text.Encoding.UTF8.GetBytes(plainText);
  return System.Convert.ToBase64String(plainTextBytes);
}

public static string Base64Decode(string base64EncodedData) {
  var base64EncodedBytes = System.Convert.FromBase64String(base64EncodedData);
  return System.Text.Encoding.UTF8.GetString(base64EncodedBytes);
}

无论如何你可以忽略C#部分,因为你只做iPhone部分.

您可以使用以下链接测试您的编码基础64是否正确.

base64toimage converter

更新1
以下代码将确认收到的字符串是否为base64格式

private bool IsBase64String(string str){
    try{
    // If not exception is caught,then it is a base64 string
    MemoryStream stream = new MemoryStream(Convert.FromBase64String(str));
    return true;
    }
    catch{
    // If exception is caught,then I assumed it is a normal string
    return false;
    }
    }

Reference

下面的代码将在Images文件夹下为给定的到达base64数据和文件名创建一个图像,例如duraiamuthan.jpg并返回图像的路径,以便您可以在DB中更新它
(它将检查到达的数据是否为base64或二进制[以防WCF框架在内部将base64转换为二进制])

public string Getpath_CreateImageFromEncodedData(string Base64EncodedData,string fileName)
        {
        string fileHandle = "";
        try
        {
            if(IsBase64String(Base64EncodedData))
            byte[] imageBytes = Convert.FromBase64String(Base64EncodedData);
            else
            byte[] imageBytes= Base64EncodedData;

            MemoryStream ms = new MemoryStream(imageBytes,imageBytes.Length);

            ms.Write(imageBytes,imageBytes.Length);

            fileHandle = System.Web.HttpContext.Current.Server.MapPath("Images/" + fileName);

            FileStream fsObj = new FileStream(fileHandle,FileMode.Create,FileAccess.Write);

            ms.WriteTo(fsObj);

            fsObj.Close();

            ms.Close();

            return fileHandle;

        }
        catch (Exception ex)
        {
           return "";
        }

    }

更新2(针对超时问题)

> NSURLRequest和NSMutableURLRequest默认超时时间为60
秒取决于互联网连接,互联网流量
网络服务器上的拥塞,ImageCreating时间和所有可能不是
够了.你可以使用以下内容将值设置为高于该值
语法[urlReqObj setTimeoutInterval：180];超时间隔是
只在几秒钟内.
>如果请求中的那么多请求队列失败,有时会增加IIS中的ConnectionTimeout默认值为120秒.增加ConnectionTimeOut会有所帮助.(此超时也适用于连接的空闲时间.)在IIS高级设置中设置它
在IIS管理器中单击您的服务 – >高级设置 – >连接限制,您可以在那里设置超时,或者您可以简单地覆盖web.config中的连接超时.
>在IIS中打开Keep-alive,以便重用相同的连接,从而提高IIS的效率.
在IIS管理器中单击您的服务 – >高级设置 – >连接限制 – >启用HTTP Keep-Alives
>如果您计划在DB中存储图像的二进制文件,您可以在connectionstring中增加DB connectiontimeout,或者可以增加sqlcommandtimeout

希望这可以帮助.如果您有任何疑问,请随时询问