cartool解压Assets.car

记录一下取图所走过的路。

众所周知，Assets.car是Assets.xcassets编译后的文件，所以里面放的都是图片资源。

1. 打开这个文件使用cartool

   
   cartool.png

下载地址：支持右键解压
这个三方下载下来可以编译成功。使用Products里的cartool就可以了。但是有的Assert.car解压后是空。

2. 原版现在编译不过
   需要如下修改，导入：#import <ImageIO/ImageIO.h>
   建议把整个main.m替换了

#import <Foundation/Foundation.h>
#import <ImageIO/ImageIO.h>

typedef enum _kCoreThemeIdiom {
    kCoreThemeIdiomUniversal,
    kCoreThemeIdiomPhone,
    kCoreThemeIdiomPad,
    kCoreThemeIdiomTV,
    kCoreThemeIdiomCar,
    kCoreThemeIdiomWatch,
    kCoreThemeIdiomMarketing
} kCoreThemeIdiom;

typedef NS_ENUM(NSInteger, UIUserInterfaceSizeClass) {
    UIUserInterfaceSizeClassUnspecified = 0,
    UIUserInterfaceSizeClassCompact     = 1,
    UIUserInterfaceSizeClassRegular     = 2,
};

@interface CUICommonAssetStorage : NSObject

-(NSArray *)allAssetKeys;
-(NSArray *)allRenditionNames;

-(id)initWithPath:(NSString *)p;

-(NSString *)versionString;

@end

@interface CUINamedImage : NSObject

@property(readonly) CGSize size;
@property(readonly) CGFloat scale;
@property(readonly) kCoreThemeIdiom idiom;
@property(readonly) UIUserInterfaceSizeClass sizeClassHorizontal;
@property(readonly) UIUserInterfaceSizeClass sizeClassVertical;

-(CGImageRef)image;

@end

@interface CUIRenditionKey : NSObject
@end

@interface CUIThemeFacet : NSObject

+(CUIThemeFacet *)themeWithContentsOfURL:(NSURL *)u error:(NSError **)e;

@end

@interface CUICatalog : NSObject

@property(readonly) bool isVectorBased;

-(id)initWithURL:(NSURL *)URL error:(NSError **)error;
-(id)initWithName:(NSString *)n fromBundle:(NSBundle *)b;
-(id)allKeys;
-(id)allImageNames;
-(CUINamedImage *)imageWithName:(NSString *)n scaleFactor:(CGFloat)s;
-(CUINamedImage *)imageWithName:(NSString *)n scaleFactor:(CGFloat)s deviceIdiom:(int)idiom;
-(NSArray *)imagesWithName:(NSString *)n;

@end


void CGImageWriteToFile(CGImageRef image, NSString *path)
{
    CFURLRef url = (__bridge CFURLRef)[NSURL fileURLWithPath:path];
    CGImageDestinationRef destination = CGImageDestinationCreateWithURL(url, kUTTypePNG, 1, NULL);
    CGImageDestinationAddImage(destination, image, nil);
    
    if (!CGImageDestinationFinalize(destination)) {
        NSLog(@"Failed to write image to %@", path);
    }
    
    CFRelease(destination);
}

NSString *idiomSuffixForCoreThemeIdiom(kCoreThemeIdiom idiom)
{
    switch (idiom) {
        case kCoreThemeIdiomUniversal:
            return @"";
            break;
        case kCoreThemeIdiomPhone:
            return @"~iphone";
            break;
        case kCoreThemeIdiomPad:
            return @"~ipad";
            break;
        case kCoreThemeIdiomTV:
            return @"~tv";
            break;
        case kCoreThemeIdiomCar:
            return @"~carplay";
            break;
        case kCoreThemeIdiomWatch:
            return @"~watch";
            break;
        case kCoreThemeIdiomMarketing:
            return @"~marketing";
            break;
        default:
            break;
    }
    
    return @"";
}

NSString *sizeClassSuffixForSizeClass(UIUserInterfaceSizeClass sizeClass)
{
    switch (sizeClass)
    {
        case UIUserInterfaceSizeClassCompact:
            return @"C";
            break;
        case UIUserInterfaceSizeClassRegular:
            return @"R";
            break;
        default:
            return @"A";
    }
}

NSMutableArray *getImagesArray(CUICatalog *catalog, NSString *key)
{
    NSMutableArray *images = [[NSMutableArray alloc] initWithCapacity:5];

    for (NSNumber *scaleFactor in @[@1, @2, @3])
    {
        CUINamedImage *image = [catalog imageWithName:key scaleFactor:scaleFactor.doubleValue];

        if (image && image.scale == scaleFactor.floatValue) [images addObject:image];
    }

    return images;
}

void exportCarFileAtPath(NSString * carPath, NSString *outputDirectoryPath)
{
    NSError *error = nil;
    
    outputDirectoryPath = [outputDirectoryPath stringByExpandingTildeInPath];
    
//    CUIThemeFacet *facet = [CUIThemeFacet themeWithContentsOfURL:[NSURL fileURLWithPath:carPath] error:&error];
//
//    CUICatalog *catalog = [[CUICatalog alloc] init];
    
    // 替换成以下代码
    CUICatalog *catalog = nil;
    if ([CUICatalog instancesRespondToSelector:@selector(initWithURL:error:)]) {
    /* If CUICatalog has the URL API (Mojave), use it. */
    catalog = [[CUICatalog alloc] initWithURL:[NSURL fileURLWithPath:carPath] error:&error];
    } else {
        CUIThemeFacet *facet = [CUIThemeFacet themeWithContentsOfURL:[NSURL fileURLWithPath:carPath] error:&error];
    catalog = [[CUICatalog alloc] init];
    /* Override CUICatalog to point to a file rather than a bundle */
    [catalog setValue:facet forKey:@"_storageRef"];
    }

    
    /* Override CUICatalog to point to a file rather than a bundle */
//    [catalog setValue:facet forKey:@"_storageRef"];
    
    /* CUICommonAssetStorage won't link */
    CUICommonAssetStorage *storage = [[NSClassFromString(@"CUICommonAssetStorage") alloc] initWithPath:carPath];
    
    for (NSString *key in [storage allRenditionNames])
    {
        printf("%s\n", [key UTF8String]);
        
        NSArray* pathComponents = [key pathComponents];
        if (pathComponents.count > 1)
        {
            // Create subdirectories for namespaced assets (those with names like "some/namespace/image-name")
            NSArray* subdirectoryComponents = [pathComponents subarrayWithRange:NSMakeRange(0, pathComponents.count - 1)];
            
            NSString* subdirectoryPath = [outputDirectoryPath copy];
            for (NSString* pathComponent in subdirectoryComponents)
            {
                subdirectoryPath = [subdirectoryPath stringByAppendingPathComponent:pathComponent];
            }
            
            [[NSFileManager defaultManager] createDirectoryAtPath:subdirectoryPath
                                      withIntermediateDirectories:YES
                                                       attributes:nil
                                                            error:&error];
        }
        
        NSMutableArray *images = getImagesArray(catalog, key);
        for( CUINamedImage *image in images )
        {
            if( CGSizeEqualToSize(image.size, CGSizeZero) )
                printf("\tnil image?\n");
            else
            {
                CGImageRef cgImage = [image image];
                NSString *idiomSuffix = idiomSuffixForCoreThemeIdiom(image.idiom);
                
                NSString *sizeClassSuffix = @"";
                
                if (image.sizeClassHorizontal || image.sizeClassVertical)
                {
                    sizeClassSuffix = [NSString stringWithFormat:@"-%@x%@", sizeClassSuffixForSizeClass(image.sizeClassHorizontal), sizeClassSuffixForSizeClass(image.sizeClassVertical)];
                }
                
                NSString *scale = image.scale > 1.0 ? [NSString stringWithFormat:@"@%dx", (int)floor(image.scale)] : @"";
                NSString *name = [NSString stringWithFormat:@"%@%@%@%@.png", key, idiomSuffix, sizeClassSuffix, scale];
                printf("\t%s\n", [name UTF8String]);
                if( outputDirectoryPath )
                    CGImageWriteToFile(cgImage, [outputDirectoryPath stringByAppendingPathComponent:name]);
            }
        }
    }
}

int main(int argc, const char * argv[])
{
    @autoreleasepool {
        
        if (argc < 2)
        {
            printf("Usage: cartool <path to Assets.car> [outputDirectory]\n");
            return -1;
        }
        
        exportCarFileAtPath([NSString stringWithUTF8String:argv[1]], argc > 2 ? [NSString stringWithUTF8String:argv[2]] : nil);
    }
    return 0;
}

参考：iOS - 解压ipa包中的Assert.car文件

3. 通过Edit Scheme...设置输入和输出
   Edit Scheme.png

Arguments.png

4. 配置好后运行即可
   注：必须创建好输出文件夹，否则运行报错！

   
   结果.png

5. 不显示Product？
   打开项目的cartool.xcodeproj，显示包内容后打开project.pbxproj
   搜索：mainGroup，将它的值覆盖下一行productRefGroup，保存后就可以看到Product了

最后这里附上原始项目及右键工具，防止github加载失败！