不推荐使用 XCodeGLKit 的警告考虑迁移到 Metal 和 Apple 电子邮件 不推荐使用 API 使用，使用 WKWebView 而不是 UIWebView

Question

我已经使用 Buildbox 2.3.3 完成了我的游戏，并在 Xcode 上清理了尽可能多的警告。但是，我从 OpenGL 迁移到 Metal 已经有好几个星期了，我认为这是我在 Xcode 中出现错误说 GLKit 已弃用的原因，请考虑迁移到 metal。

我试图在没有解决此错误的情况下将游戏上传到 App Store Connect，但随后我立即收到一封电子邮件，说

ITMS-90809：不推荐使用 API，新应用不再使用 UIWebView， 改用 WKWebView。

我不知道如何转换我的代码来满足这一点我真的很感激一些指导，或者如果有人可以为我重写我的代码，将 OpenGL 转换为 metal。

我将在下面附上我正在使用的代码，如果有人可以帮助我，我将不胜感激。几个星期以来，我一直被困在最后阶段，这非常令人沮丧。

AppDelegate.h

#import <UIKit/UIKit.h>

@interface AppDelegate : UIResponder <UIApplicationDelegate>{
}

@property (strong, nonatomic) UIWindow *window;


@end

AppDelegate.mm

#import "AppDelegate.h"
#import <GLKit/GLKit.h>
#include "PTPSettingsController.h"
#include "libs/cocos2dx/include/audio/include/SimpleAudioEngine.h"

@interface AppDelegate ()

@end

@implementation AppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
        
    return YES;
}


- (void)applicationWillResignActive:(UIApplication *)application {
    cocos2d::CCDirector::sharedDirector()->pause();
}

- (void)applicationDidEnterBackground:(UIApplication *)application {
    cocos2d::CCApplication::sharedApplication()->applicationDidEnterBackground();
}

- (void)applicationWillEnterForeground:(UIApplication *)application {
    cocos2d::CCApplication::sharedApplication()->applicationWillEnterForeground();
}

- (void)applicationDidBecomeActive:(UIApplication *)application {
    cocos2d::CCDirector::sharedDirector()->resume();
}

- (void)applicationWillTerminate:(UIApplication *)application {
}

- (void)loadingDidComplete{
}

-(void)showCustomFullscreenAd{
}

- (void)screenOnEnter:(const char*) name{
}

- (void)screenOnExit:(const char*) name{
}

@end

GameViewController.h

#import <UIKit/UIKit.h>
#import <GLKit/GLKit.h>

@interface GameViewController : GLKViewController

@end

GameViewController.mm

#import "GameViewController.h"
#import <OpenGLES/ES2/glext.h>
#import "PTModelController.h"
#import "PTModelGeneralSettings.h"
#import "PTPAppDelegate.h"
#import "cocos2d.h"
#import "PTPConfig.h"
#include "PTPSettingsController.h"


#define IOS_MAX_TOUCHES_COUNT     10

static PTPAppDelegate s_sharedApplication;

@interface GameViewController () {
    NSString* shareMessage;
    bool sheduledForShareWidget;
}
@property (strong, nonatomic) EAGLContext *context;

@end

@implementation GameViewController

- (void)viewDidLoad{
    [super viewDidLoad];
    
    sheduledForShareWidget = false;
    self.context = [[EAGLContext alloc] initWithAPI:kEAGLRenderingAPIOpenGLES2];

    if (!self.context) {
        NSLog(@"Failed to create ES context");
    }
    
    GLKView *view = (GLKView *)self.view;
    view.context = self.context;
    view.drawableDepthFormat = GLKViewDrawableDepthFormat24;
    [view setMultipleTouchEnabled: YES];
    
    [self setPreferredFramesPerSecond:60];
    [EAGLContext setCurrentContext:self.context];
    
    PTModelController *mc = PTModelController::shared();
    mc->clean();
    
    unsigned long size = 0;
    char* pBuffer = (char*)CCFileUtils::sharedFileUtils()->getFileData("data/data.pkg", "rb", &size);
    if (pBuffer != NULL && size > 0){
        mc->setUsingDataEncryption( true );
    }
    
    mc->loadDataForSplashScreen("data/data.pkg", processor().c_str());
    
    s_sharedApplication.setDataArchiveProcessor(processor());
    
    
    cocos2d::CCApplication::sharedApplication()->run();
}

- (void)dealloc{
    if ([EAGLContext currentContext] == self.context) {
        [EAGLContext setCurrentContext:nil];
    }
}

- (void)didReceiveMemoryWarning{
    [super didReceiveMemoryWarning];

    if ([self isViewLoaded] && ([[self view] window] == nil)) {
        self.view = nil;
        
        if ([EAGLContext currentContext] == self.context) {
            [EAGLContext setCurrentContext:nil];
        }
        self.context = nil;
    }

    // Dispose of any resources that can be recreated.
}

- (BOOL)prefersStatusBarHidden {
    return YES;
}

- (void)glkView:(GLKView *)view drawInRect:(CGRect)rect{
    glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    
    cocos2d::CCDirector::sharedDirector()->setViewport();
    cocos2d::CCDirector::sharedDirector()->mainLoop();
}


- (void)update{
    if(sheduledForShareWidget == true){
        sheduledForShareWidget = false;
        
        GLKView *view  = (GLKView *)self.view;
        UIImage* screenshot = view.snapshot;
        
        PTLog("Opens Share Widget: screenshot was taken");
        
        UIActivityViewController *activityVC = [[UIActivityViewController alloc] initWithActivityItems:@[shareMessage, screenshot] applicationActivities:nil];
        
        NSArray *excludeActivities = @[UIActivityTypeSaveToCameraRoll,
                                       UIActivityTypeAssignToContact];
        activityVC.excludedActivityTypes = excludeActivities;
        
        
        float iOSVersion = [[UIDevice currentDevice].systemVersion floatValue];
        if(iOSVersion > 8.0){
            activityVC.popoverPresentationController.sourceView = self.view;
        }
        
        [self presentViewController:activityVC animated:YES completion:nil];
        PTLog("opens Share Widget: view controller presented");
    }
}

- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(nullable UIEvent *)event{
    int ids[IOS_MAX_TOUCHES_COUNT] = {0};
    float xs[IOS_MAX_TOUCHES_COUNT] = {0.0f};
    float ys[IOS_MAX_TOUCHES_COUNT] = {0.0f};
    
    int i = 0;
    for (UITouch *touch in touches) {
        ids[i] = (intptr_t)touch;
        xs[i] = [touch locationInView: [touch view]].x * self.view.contentScaleFactor;
        ys[i] = [touch locationInView: [touch view]].y * self.view.contentScaleFactor;
        ++i;
    }
    cocos2d::CCEGLView::sharedOpenGLView()->handleTouchesBegin(i, ids, xs, ys);
}

- (void)touchesMoved:(NSSet<UITouch *> *)touches withEvent:(nullable UIEvent *)event{
    int ids[IOS_MAX_TOUCHES_COUNT] = {0};
    float xs[IOS_MAX_TOUCHES_COUNT] = {0.0f};
    float ys[IOS_MAX_TOUCHES_COUNT] = {0.0f};
    
    int i = 0;
    for (UITouch *touch in touches) {
        ids[i] = (intptr_t)touch;
        xs[i] = [touch locationInView: [touch view]].x * self.view.contentScaleFactor;;
        ys[i] = [touch locationInView: [touch view]].y * self.view.contentScaleFactor;;
        ++i;
    }
    cocos2d::CCEGLView::sharedOpenGLView()->handleTouchesMove(i, ids, xs, ys);
}

- (void)touchesEnded:(NSSet<UITouch *> *)touches withEvent:(nullable UIEvent *)event{
    int ids[IOS_MAX_TOUCHES_COUNT] = {0};
    float xs[IOS_MAX_TOUCHES_COUNT] = {0.0f};
    float ys[IOS_MAX_TOUCHES_COUNT] = {0.0f};
    
    int i = 0;
    for (UITouch *touch in touches) {
        ids[i] = (intptr_t)touch;
        xs[i] = [touch locationInView: [touch view]].x * self.view.contentScaleFactor;;
        ys[i] = [touch locationInView: [touch view]].y * self.view.contentScaleFactor;;
        ++i;
    }
    cocos2d::CCEGLView::sharedOpenGLView()->handleTouchesEnd(i, ids, xs, ys);
}

- (void)touchesCancelled:(NSSet<UITouch *> *)touches withEvent:(nullable UIEvent *)event{
    int ids[IOS_MAX_TOUCHES_COUNT] = {0};
    float xs[IOS_MAX_TOUCHES_COUNT] = {0.0f};
    float ys[IOS_MAX_TOUCHES_COUNT] = {0.0f};
    
    int i = 0;
    for (UITouch *touch in touches) {
        ids[i] = (intptr_t)touch;
        xs[i] = [touch locationInView: [touch view]].x * self.view.contentScaleFactor;;
        ys[i] = [touch locationInView: [touch view]].y * self.view.contentScaleFactor;;
        ++i;
    }
    cocos2d::CCEGLView::sharedOpenGLView()->handleTouchesCancel(i, ids, xs, ys);
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
    PTModelGeneralSettingsPtr generalSettings = PTModelGeneralSettings::shared();
    if(generalSettings->orientation() == PTModelGeneralSettings::LandscapeOrientation){
        return UIInterfaceOrientationIsLandscape( interfaceOrientation );
    }
    else if(generalSettings->orientation() == PTModelGeneralSettings::PortraitOrientation){
        return UIInterfaceOrientationIsPortrait( interfaceOrientation );
    }
    
    return NO;
}

- (NSUInteger) supportedInterfaceOrientations{
    PTModelGeneralSettingsPtr generalSettings = PTModelGeneralSettings::shared();
    if(generalSettings->orientation() == PTModelGeneralSettings::LandscapeOrientation){
        return UIInterfaceOrientationMaskLandscape;
        
    }
    else if(generalSettings->orientation() == PTModelGeneralSettings::PortraitOrientation){
        return UIInterfaceOrientationMaskPortrait;
    }
    
    return NO;
}

- (BOOL) shouldAutorotate {
    return NO;
}

-(void) scheduleOpenShareWidget:(const char*) message{
    shareMessage = [NSString stringWithUTF8String:message];
    sheduledForShareWidget = true;
}

@end

Answer 1

正如您已经被告知的那样，您的问题有点不适合 Stack Overflow。您可以开始将您的项目从 OpenGL 重写为 Metal，并在出现任何问题时提出问题。

Apple 文档是一个很好的起点：

• Migrating OpenGL Code to Metal

• Mixing Metal and OpenGL Rendering in a View

您还可以观看 WWDC 2019 video 并学习将基于 OpenGL 的应用程序转换为 Metal API 的分步方法。

Answer 2

OpenGL 是可移植的并且被广泛支持，所以不能使用它很可惜。幸运的是，MetalANGLE 框架几乎是 GLKit 的完美替代品。我已经开始在我的地图渲染库CartoType 的开发分支中使用它，并且它可以正常工作：与 GLKit 相比，我看不到图形有任何区别，我只需要对我的代码做一点小改动让它工作——而这种变化可能是由于对 GLKit 的错误使用造成的。

所以我的建议是：继续使用 OpenGL 并使用 MetalANGLE。