iphone - 体系结构 i386 的 undefined symbol ，ld : symbol(s) not found for architecture i386

Question

我想我又遇到了障碍，事情是这样的:

Undefined symbols for architecture i386:
  "CreateRenderer1()", referenced from:
      -[GLView initWithFrame:] in GLView.o
ld: symbol(s) not found for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see invocation)

当您提问时，我几乎尝试了自动搜索中显示的所有建议:

将这些库添加到“构建阶段”下的“链接二进制文件与库”选项卡:

OpenGLES.framework
QuartzCore.framework

将所有相关文件添加到目标/编译源

将所有扩展名为 .m 的相关文件重命名为 .mm

我正在尝试在 Xcode 4.3.2 上的 iPhone 5.1 模拟器上编译此代码，是否有任何我遗漏的明显内容？我有一种感觉，这是设置中的某些内容，但我尝试过的似乎都不起作用 =(

编辑:

GLView.h:

#import "IRenderingEngine.hpp"
#import <OpenGLES/EAGL.h>
#import <QuartzCore/QuartzCore.h>

@interface GLView : UIView {
    EAGLContext* m_context;
    IRenderingEngine* m_renderingEngine;
    float m_timestamp;
}

- (void) drawView: (CADisplayLink*) displayLink;
- (void) didRotate: (NSNotification*) notification;

@end

GLView.mm:

#import <OpenGLES/EAGLDrawable.h>   
#import "GLView.h"
#import "mach/mach_time.h"
#import <OpenGLES/ES2/gl.h> // <-- for GL_RENDERBUFFER only

@implementation GLView

+ (Class) layerClass
{
    return [CAEAGLLayer class];
}

- (id)initWithFrame:(CGRect)frame
{
    if (self = [super initWithFrame:frame]) {
        CAEAGLLayer* eaglLayer = (CAEAGLLayer*) super.layer;
        eaglLayer.opaque = YES;
        m_context = [[EAGLContext alloc] initWithAPI:kEAGLRenderingAPIOpenGLES1];

        if (!m_context || ![EAGLContext setCurrentContext:m_context]) {
            [self release];
            return nil;
        }

        m_renderingEngine = CreateRenderer1();

        [m_context
         renderbufferStorage:GL_RENDERBUFFER
         fromDrawable: eaglLayer];

        m_renderingEngine->Initialize(CGRectGetWidth(frame), CGRectGetHeight(frame));

        [self drawView: nil];
        m_timestamp = CACurrentMediaTime();

        CADisplayLink* displayLink;
        displayLink = [CADisplayLink displayLinkWithTarget:self
                                                  selector:@selector(drawView:)];

        [displayLink addToRunLoop:[NSRunLoop currentRunLoop]
                          forMode:NSDefaultRunLoopMode];

        [[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];

        [[NSNotificationCenter defaultCenter]
         addObserver:self
         selector:@selector(didRotate:)
         name:UIDeviceOrientationDidChangeNotification
         object:nil];
    }
    return self;
}


- (void) didRotate: (NSNotification*) notification
{
    UIDeviceOrientation orientation = [[UIDevice currentDevice] orientation];
    m_renderingEngine->OnRotate((DeviceOrientation) orientation);
    [self drawView: nil];
}

- (void) drawView: (CADisplayLink*) displayLink
{
    if (displayLink != nil) {
        float elapsedSeconds = displayLink.timestamp - m_timestamp;
        m_timestamp = displayLink.timestamp;
        m_renderingEngine->UpdateAnimation(elapsedSeconds);
    }

    m_renderingEngine->Render();
    [m_context presentRenderbuffer:GL_RENDERBUFFER];
}

/*
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect
{
    // Drawing code
}
*/

@end

IRenderingEngine.hpp

enum DeviceOrientation {
    DeviceOrientationUnknown,
    DeviceOrientationPortrait,
    DeviceOrientationPortraitUpsideDown,
    DeviceOrientationLandscapeLeft,
    DeviceOrientationLandscapeRight,
    DeviceOrientationFaceUp,
    DeviceOrientationFaceDown,
};

// Creates an instance of the renderer and sets up various OpenGL state.
struct IRenderingEngine* CreateRenderer1();

// Interface to the OpenGL ES renderer; consumed by GLView.
struct IRenderingEngine {
    virtual void Initialize(int width, int height) = 0;    
    virtual void Render() const = 0;
    virtual void UpdateAnimation(float timeStep) = 0;
    virtual void OnRotate(DeviceOrientation newOrientation) = 0;
    virtual ~IRenderingEngine() {}
};

Answer 1

编译器未找到您的 IRenderingEngine 实现。要么缺少实现，要么文件未正确添加到目标。