How to restore spriteframes packed by texture packer

Question

I got some image resources from a iOS game (a png file & a plist file). The resources are packed by texture packer. I'd like to restore the .png & .plist file back to png images, but I don't know how to do this.

Answer 1

I wrote a little cocos2d project just to achieve that a time ago. You basically use CCSpriteFrameCache to load the plist information, and then iterate over each spriteFrame to 'cut' the desired piece of the atlas with CCRenderTexture. The main logic looks like this.-

-(id) init
{
    // always call "super" init
    // Apple recommends to re-assign "self" with the "super" return value
    if( (self=[super init])) {

        [[CCSpriteFrameCache sharedSpriteFrameCache] addSpriteFramesWithFile:PLIST_FILE];

        NSDictionary *frames = [[CCSpriteFrameCache sharedSpriteFrameCache] spriteFrames];

        for(id key in frames) {
            //NSLog(@"key=%@ value=%@", key, [frames objectForKey:key]);
            [self saveSpriteToFile:key inFolder:FOLDER_PATH];
        }

    }
    return self;
}

-(void) saveSpriteToFile:(NSString *)name inFolder:(NSString *) folder {
    CCSprite *sprite = [CCSprite spriteWithSpriteFrameName:name];
    CGSize spriteSize = [sprite contentSize];
    float scale = 1;
    int nWidth = spriteSize.width;
    int nHeight = spriteSize.height;
    nWidth *= scale;
    nHeight *= scale;
    [sprite setPosition:ccp(spriteSize.width / 2, spriteSize.height / 2)];
    [sprite setScale:scale];
    [self addChild:sprite];

    CCRenderTexture* render = [CCRenderTexture renderTextureWithWidth:sprite.contentSize.width height:sprite.contentSize.height];
    [render begin];
    [sprite visit];
    [render end];
    //NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    //NSString *documentsDirectory = [paths objectAtIndex:0];
    [render saveToFile:[NSString stringWithFormat:@"%@/%@", folder, name] format:kCCImageFormatPNG];

    [self removeChild:sprite cleanup:YES];
}

Just in case anyone else found it useful, I've just uploaded the whole project to github.-

https://github.com/zuinqstudio/atlasSplitter

Hope it helps.