objective-c - 如何以编程方式创建 ICNS 图标？

Question

好的，这就是我想要的:

• 取一些NSImage
• 将它们添加到 ICNS 文件
• 保存

这是我到目前为止所做的(纯粹作为测试):

- (CGImageRef)refFromImage:(NSImage*)img
{
    CGImageSourceRef source;

    source = CGImageSourceCreateWithData((CFDataRef)[img TIFFRepresentation], NULL);
    CGImageRef maskRef =  CGImageSourceCreateImageAtIndex(source, 0, NULL);

    return maskRef;
}

- (void)awakeFromNib
{
    NSImage* img1 = [NSImage imageNamed:@"image1"];
    NSImage* img2 = [NSImage imageNamed:@"image2"];

    NSLog(@"%@",img1);
    CGImageRef i1 = [self refFromImage:img1];
    CGImageRef i2 = [self refFromImage:img2];

    NSURL *fileURL = [NSURL fileURLWithPath:[@"~/Documents/final.icns" stringByExpandingTildeInPath]]; 
    CGImageDestinationRef dr = CGImageDestinationCreateWithURL((__bridge CFURLRef)fileURL, kUTTypeAppleICNS , 1, NULL);

    CGImageDestinationAddImage(dr, i1, NULL);
    CGImageDestinationAddImage(dr, i2, NULL);
    /* Even tried adding 'multiple' times

    CGImageDestinationAddImage(dr, i1, NULL);
    CGImageDestinationAddImage(dr, i2, NULL);
    CGImageDestinationAddImage(dr, i1, NULL);
    CGImageDestinationAddImage(dr, i2, NULL);

    */

    CGImageDestinationFinalize(dr);

    CFRelease(dr);
}

但是，它仍然不断抛出错误:

ImageIO: CGImageDestinationFinalize image destination does not have enough images

我的代码有什么问题？

---

我已经看过下面的答案，但仍然一无所获:

• Save CGImageRef to PNG file errors? (ARC Caused?)
• How exactly to make a CGImageRef from an image on disk

Answer 1

您可以使用 IconFamily .

IconFamily is a Cocoa/Objective-C wrapper for the Mac OS X Carbon API's "icon family" data type. Its main purpose is to enable Cocoa applications to easily create custom file icons from NSImage instances, and thus take advantage of Mac OS X's high-resolution RGBA "thumbnail" icon formats to provide richly detailed thumbnail previews of the files' contents.

NSImage *mImage = [[NSImage alloc] initWithContentsOfFile:@"/Users/Username/Desktop/WhiteTiger.jpg"];
IconFamily *fam = [IconFamily iconFamilyWithThumbnailsOfImage:mImage];    
[fam writeToFile:@"/Users/Username/Desktop/WhiteTiger.icns"];