我试图将GLKView嵌套在UIView XIB中。基本上遵循以下步骤:
Nested GLKView and GLKViewController

我的CustomOpenGLController.xib只是一个GLKView

我的MainViewController.xib有一个GLKView子视图。

在我的MainViewController.xib中,我有一个带有出口的GLKView

 @property (weak, nonatomic) IBOutlet GLKView *theSubView;


然后在MainViewController.m中执行以下操作:

- (void)viewDidLoad
{
    [super viewDidLoad];

    NSLog(@"viewDidLoad");
    subviewController = [[CustomOpenGLController alloc] initWithNibName:@"CustomOpenGLController" bundle:nil];
    subviewController.view.frame = _theSubView.frame;
    [subviewController setView:self.theSubView];
    [self.theSubView setNeedsDisplay];
    [subviewController didMoveToParentViewController:self];
}


这将导致调用viewDidLoad中的CustomOpenGLController来执行以下操作:

CustomOpenGLController.h

@interface CustomOpenGLController : GLKViewController <GLKViewControllerDelegate, GLKViewDelegate>
{
@private
    GLKBaseEffect *effect;
}

#pragma mark GLKViewControllerDelegate
- (void)glkViewControllerUpdate:(GLKViewController *)controller;

#pragma mark GLKViewDelegate
- (void)glkView:(GLKView *)view drawInRect:(CGRect)rect;

@end


CustomOpenGLController.m

- (void)viewDidLoad
{
    [super viewDidLoad];

    NSLog(@"viewDidLoad");

    EAGLContext *aContext = [[EAGLContext alloc] initWithAPI:kEAGLRenderingAPIOpenGLES2];

    GLKView *glkView = (GLKView *)self.view;
    glkView.delegate = self;
    glkView.context = aContext;

    glkView.drawableColorFormat = GLKViewDrawableColorFormatRGBA8888;
    glkView.drawableDepthFormat = GLKViewDrawableDepthFormat16;
    glkView.drawableMultisample = GLKViewDrawableMultisample4X;

    self.delegate = self;
    self.preferredFramesPerSecond = 30;

    effect = [[GLKBaseEffect alloc] init];

    glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
}


问题是委托glkViewControllerUpdateglkView drawInRect没有被调用。

如果我将CustomOpenGLController添加为子视图(而不是setView调用),则glkView drawInRect会被调用一次。如果单独使用CustomOpenGLController作为视图,那么一切都将完美运行。

但是我需要将此CustomOpenGLController嵌入到普通视图控制器中。

更新

如果我将MainViewController.m的viewDidLoad修改为以下内容,则它可以工作,但只渲染1帧,然后停止调用glkView drawInRect:

- (void)viewDidLoad
{
    [super viewDidLoad];

    NSLog(@"viewDidLoad ControllerView");
    subviewController = [[ControllerOpenGLViewController alloc] initWithNibName:@"ControllerOpenGLViewController" bundle:nil];
    subviewController.view.frame = _theSubView.frame;

    subviewController.view.opaque = NO;
    subviewController.view.backgroundColor = [UIColor clearColor];

    [self.view addSubview:subviewController.view];
    [subviewController.view setNeedsDisplay];

    NSLog(@"Done viewDidLoad ControllerView");
}


这奇怪地渲染1帧,然后停止。也不会调用glkViewControllerUpdate

最佳答案

您将CustomOpenGLController设置为子ViewController,但从未在addChildViewController viewDidLoad中调用MainViewController。您的问题可能来自此

10-07 19:26
查看更多