on iPad retina @2x 正确加载，但 -hd 以一半大小加载，即使图像相同

Question

@2x 图像与-hd 图像完全相同，除了后缀。同时包括 @2x 和 -hd 允许程序在所有设备上正常运行，但显然我想摆脱一组以减小文件大小。

当使用 [sharedFileUtils setiPadSuffix:@"@2x"] 时，iPad 使用 @2x 图像，一切都很好。以正确的内容比例和所有内容加载。

当使用 [sharedFileUtils setiPadSuffix:@"-hd"] 时，iPad 确实使用了 -hd 图像（用 [sharedFileUtils fullPathForFilename:@"image.png"] 检查过）。但是，所有内容突然以 50% 的大小加载。

（我是运行宁 Cocos2d 3.4.3 和 Xcode 6.1.1）

为什么要这样做？

Answer 1

警告：胆小者勿入。

我正在为所有设备使用一组纹理（-hd 变体）。在实施时，我发现 CCFileUtils returns 中的 contentScaleForKey 方法是一个流浪汉值。除了在 cocos' 发行版中进行篡改外，我没有找到其他方法，如下所示：

-(CGFloat) contentScaleForKey:(NSString*)k inDictionary:(NSDictionary *)dictionary
{
    // XXX XXX Super Slow
    // ylb fix for single set of textures
    return 2.0f;
    // ylb : super fast now :)
}

我在 AppDelegate（版本 3.2.1）中设置如下：

@implementation AppDelegate

NSString *kCCFileUtilsSuffixDefault   = @"default";
NSString *kCCFileUtilsSuffixiPad      = @"ipad";
NSString *kCCFileUtilsSuffixiPadHD    = @"ipadhd";
NSString *kCCFileUtilsSuffixiPhone    = @"iphone";
NSString *kCCFileUtilsSuffixiPhoneHD  = @"iphonehd";
NSString *kCCFileUtilsSuffixiPhone5   = @"iphone5";
NSString *kCCFileUtilsSuffixiPhone5HD = @"iphone5hd";

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    // This is the only app delegate method you need to implement when inheriting from CCAppDelegate.
    // This method is a good place to add one time setup code that only runs when your app is first launched.

    // Setup Cocos2D with reasonable defaults for everything.
    // There are a number of simple options you can change.
    // If you want more flexibility, you can configure Cocos2D yourself instead of calling setupCocos2dWithOptions:.
   //    [[CCFileUtils sharedFileUtils] setEnableiPhoneResourcesOniPad:YES];

    [GEFileUtil initializeWithProductDirectoryName:@"battles" andMaximumGames:4];
    TRACE(@"Setting up cocos2d in fixed screen mode");
    [GERuntimeConstants setDeviceType:CCScreenModeFixedSize];
    NSDictionary *dic = [CCFileUtils sharedFileUtils].suffixesDict;
    [dic setValue:@"-hd" forKey:kCCFileUtilsSuffixDefault];
    [dic setValue:@"-hd" forKey:kCCFileUtilsSuffixiPhone];
    [dic setValue:@"-hd" forKey:kCCFileUtilsSuffixiPad];
    [dic setValue:@"-hd" forKey:kCCFileUtilsSuffixiPadHD];
    [dic setValue:@"-hd" forKey:kCCFileUtilsSuffixiPhoneHD];
    [dic setValue:@"-hd" forKey:kCCFileUtilsSuffixiPhone5];
    [dic setValue:@"-hd" forKey:kCCFileUtilsSuffixiPhone5HD];

    [self setupCocos2dWithOptions:@{
        // Show the FPS and draw call label.
        CCSetupShowDebugStats : @(YES),

        // More examples of options you might want to fiddle with:
        // (See CCAppDelegate.h for more information)
        // Use a 16 bit color buffer:
        // CCSetupPixelFormat: kEAGLColorFormatRGB565,

        // Use a simplified coordinate system that is shared across devices.
        CCSetupScreenMode : CCScreenModeFixed,

        // Run in landscape mode.
        CCSetupScreenOrientation : CCScreenOrientationLandscape,

        // Run at a reduced framerate. Prefer that to 'dang' jitter
        CCSetupAnimationInterval : @(1.0 / 30.0),

        // Run the fixed timestep extra fast.
        CCSetupFixedUpdateInterval : @(1.0 / 60.0),

        // clipping with stensil
        CCSetupDepthFormat : [NSNumber numberWithUnsignedInt:GL_DEPTH24_STENCIL8_OES],
        // Make iPad's act like they run at a 2x content scale. (iPad retina 4x)
        //      CCSetupTabletScale2X: @(YES),
    }];

现在在所有设备上工作，注意如果我想更新 cocos2d，我必须格外小心（永远不要在我的位工厂中进行项目).

on iPad retina @2x 正确加载，但 -hd 以一半大小加载，即使图像相同

on iPad retina @2x loads properly, but -hd loads at half-size even though images are identical

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