回答
//get the image
NSImage *newImage = [[NSImage alloc] initWithContentsOfFile:@"~/Desktop/testImg.png"];
//convert to BitmapImageRep
NSBitmapImageRep *bitmap = [[newImage representations] objectAtIndex:0];
//convert to NSData
NSData *data = [bitmap representationUsingType: NSPNGFileType properties: nil];
//base64 encode and now I have the string.
NSString *imageString = [data encodeBase64WithNewlines:NO];
NSLog(@"image %@", imageString);
//No that I have the string, I can hard code it into my source code (paste it in).
//When I want to create an image out of it I just get the imageString and convert it to an image
NSData *revData = [imageString decodeBase64WithNewlines:NO];
newImage = [[NSImage alloc] initWithData:revData];
我有我在这里使用2个NSData的类别(encodeBase64WithNewlines:NO和decodeBase64WithNewlines:NO),您将有包括libcrypto.dylib为他们工作。我想我从Cocoa Dev
- (NSString *) encodeBase64WithNewlines: (BOOL) encodeWithNewlines
{
// Create a memory buffer which will contain the Base64 encoded string
BIO * mem = BIO_new(BIO_s_mem());
// Push on a Base64 filter so that writing to the buffer encodes the data
BIO * b64 = BIO_new(BIO_f_base64());
if (!encodeWithNewlines)
BIO_set_flags(b64, BIO_FLAGS_BASE64_NO_NL);
mem = BIO_push(b64, mem);
// Encode all the data
BIO_write(mem, [self bytes], [self length]);
int flushResult = BIO_flush(mem);
if(flushResult != 0){
//throw some warning?
}
// Create a new string from the data in the memory buffer
char * base64Pointer;
long base64Length = BIO_get_mem_data(mem, &base64Pointer);
NSData * base64data = [NSData dataWithBytesNoCopy:base64Pointer length:base64Length freeWhenDone:NO];
NSString * base64String = [[NSString alloc] initWithData:base64data encoding:NSUTF8StringEncoding];
// Clean up and go home
BIO_free_all(mem);
return [base64String autorelease];
}
- (NSData *)decodeBase64WithNewLines:(BOOL)encodedWithNewlines
{
// Create a memory buffer containing Base64 encoded string data
BIO * mem = BIO_new_mem_buf((void *) [self bytes], [self length]);
// Push a Base64 filter so that reading from the buffer decodes it
BIO * b64 = BIO_new(BIO_f_base64());
if (!encodedWithNewlines)
BIO_set_flags(b64, BIO_FLAGS_BASE64_NO_NL);
mem = BIO_push(b64, mem);
// Decode into an NSMutableData
NSMutableData * data = [NSMutableData data];
char inbuf[512];
int inlen;
while ((inlen = BIO_read(mem, inbuf, sizeof(inbuf))) > 0)
[data appendBytes: inbuf length: inlen];
// Clean up and go home
BIO_free_all(mem);
return data;
}
使用NSData
而不是NSString
。
NSImage
是NSCoding
兼容 - 它知道如何存档自己,以及如何创建/读取其他文件格式的图像表示。
如果您想使用其他图像表示法,则可以使用CGImage
apis创建一个CGImage
,然后可以使用它来创建NSImage
。
我可以把它纳入NSData没有问题,但什么那我以后用它做?至于NSCoding,将它保存到plist还是我可以复制和粘贴的东西? – joels 2011-05-28 22:56:52
从NSData表示到数据blob为ac源的短路径是创建一个简单的程序,它重新格式化[数据描述]返回的数据表示的输出,然后将其打印到控制台并将其复制/粘贴到您的源文件(或者让它生成一个源文件)。我认为,这会起作用。 – justin 2011-05-29 00:28:13
“创建一个简单的程序,重新格式化数据表示的输出”这是一个大问题。它应该如何格式化?或者,我可以从[数据描述]中复制打印出来并粘贴到源代码中var NSString * dataDescription =“printOutFromNSLog”,然后调用NSData * fromDataDescription = [NSData dataFromString]? – joels 2011-05-29 02:58:06
也许你应该看看base64编码? – galymzhan 2011-05-28 18:28:23
看到http://stackoverflow.com/questions/225480/embed-image-in-code-without-using-resource-section-or-external-images/225658#225658 – 2011-05-28 19:00:58