Question

在新建的工程 UI增加一个按钮，并在按钮事件响应里调用如下代码，显示MxCAD：

修改ViewController.mm文件：

#import "platform/ios/CCEAGLView-ios.h"
#import "cocos2d.h"
#import "mxcode/MxAppDelegate.h"
#import "mxcode/RootViewController.h"
RootViewController* viewController = nullptr;
CCEAGLView *eaglView = nullptr;
static MxAppDelegate s_sharedApplication;

在按钮点击事件里，显示 MxCAD代码：

- (IBAction)click:(UIButton *)sender {
    
    if(viewController == nullptr)
    {
        
        cocos2d::Application *app = cocos2d::Application::getInstance();
        s_sharedApplication.InitMxProtocol();
        app->initGLContextAttrs();
        cocos2d::GLViewImpl::convertAttrs();
 
        eaglView = [CCEAGLView viewWithFrame: [UIScreen mainScreen].bounds
                                 pixelFormat: (NSString*)cocos2d::GLViewImpl::_pixelFormat
                                 depthFormat: cocos2d::GLViewImpl::_depthFormat
                          preserveBackbuffer: NO
                                  sharegroup: nil
                               multiSampling: NO
                             numberOfSamples: 4 ];
        
 
        [eaglView setMultipleTouchEnabled:YES];
        
       
        viewController = [[RootViewController alloc] initWithNibName:nil bundle:nil];
        viewController.wantsFullScreenLayout = YES;
        viewController.view = eaglView;
        
     
        cocos2d::GLView *glview = cocos2d::GLViewImpl::createWithEAGLView(eaglView);
        cocos2d::Director::getInstance()->setOpenGLView(glview);
        
        
        app->run();
        
        cocos2d::Director::getInstance()->getEventDispatcher()->addCustomEventListener("returnCAD", [=](cocos2d::EventCustom* eve)
                                                                                       {
                                                                                           //call you return ;
                                                                                           
                                                                                           
                                                                                           [self present];
                                                                                           
                                                                                       });
        
    } 
    [self presentViewController:viewController animated:YES completion:nil];
}

所有工作已经完成，再在可以编译运行了。