我有以下C#编码将上传的位图图像转换为Hex。我需要遵循算法以达到目标C中的相同目标ip。假设我有一个UIImageView,其图像是从“图片库”中选择的。我需要将此选定的图像转换为十六进制并写入文本文件。
有人请给我帮助,以将代码转换为目标C。我对IOS开发有一定的了解,但对图像处理的了解却不多。
这是我的代码,
Bitmap bm1 = (Bitmap)pictureBox1.Image;
int PictureWidth = pictureBox1.Image.Width;
int PictureHeight = pictureBox1.Image.Height;
int PictureX;
int PictureY;
int NVImageWidth;
int NVImageHeight;
NVImageWidth = PictureWidth;
NVImageHeight = PictureHeight;
int Quotient;
int Remainder;
int wp;
wp = 0;
StreamWriter sw = new StreamWriter("D:\\Test.txt");
for (PictureX = 0; PictureX <= PictureWidth - 1; PictureX++)
{
for (PictureY = 0; PictureY <= NVImageHeight - 1; PictureY++)
{
Color c1 = bm1.GetPixel(PictureX, PictureY);
if ((PictureY % 8) == 0)
{
wp = 0;
wp = (c1.G!=0) ? 0 : 1;
}
else if ((PictureY % 8) == 7)
{
wp = (wp << 1) | ((c1.G!=0) ? 0 : 1);
sw.Write(string.Format("%{0:x2}", wp));
}
else
{
wp = (wp << 1) | ((c1.G!=0) ? 0 : 1);
}
}
}
sw.Close();
我有一个建议:
首先将UIImage转换为NSData。然后将NSData转换为十六进制。
例如
//converting to hexadecimal
-(NSString*)hexRepresentationWithSpaces_AS:(BOOL)spaces
{
const unsigned char* bytes = (const unsigned char*)[self bytes];
NSUInteger nbBytes = [self length];
//If spaces is true, insert a space every this many input bytes (twice this many output characters).
static const NSUInteger spaceEveryThisManyBytes = 4UL;
//If spaces is true, insert a line-break instead of a space every this many spaces.
static const NSUInteger lineBreakEveryThisManySpaces = 4UL;
const NSUInteger lineBreakEveryThisManyBytes = spaceEveryThisManyBytes * lineBreakEveryThisManySpaces;
NSUInteger strLen = 2*nbBytes + (spaces ? nbBytes/spaceEveryThisManyBytes : 0);
NSMutableString* hex = [[NSMutableString alloc] initWithCapacity:strLen];
for(NSUInteger i=0; i<nbBytes; ) {
[hex appendFormat:@"%02X", bytes[i]];
//We need to increment here so that the every-n-bytes computations are right.
++i;
if (spaces) {
if (i % lineBreakEveryThisManyBytes == 0) [hex appendString:@"\n"];
else if (i % spaceEveryThisManyBytes == 0) [hex appendString:@" "];
}
}
return [hex autorelease];
}
NSData *imageData = UIImagePNGRepresentation(myImage.image);
NSString* hex = [imageData hexRepresentationWithSpaces_AS:YES];
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