ios - - (BOOL)loadShaders 方法对我不起作用

Question

我正在尝试从基于 View 的应用程序中使用 opengl es 2.0 制作图表，但是 - (BOOL)loadShaders 总是返回 NO，因此控制在 renderer1 中进行。知道发生了什么吗？

- (BOOL)loadShaders {
        //return YES;
    GLuint vertShader, fragShader;
    NSString *vertShaderPathname, *fragShaderPathname;

        // create shader program
    program = glCreateProgram();

        // create and compile vertex shader

    vertShaderPathname = [[NSBundle mainBundle] pathForResource:@"Shader" ofType:@"vsh"];  // this is returning nil always.

    if (!compileShader(&vertShader, GL_VERTEX_SHADER, 1, vertShaderPathname)) {
        destroyShaders(vertShader, fragShader, program);
        return NO;
    }

        // create and compile fragment shader
    fragShaderPathname = [[NSBundle mainBundle] pathForResource:@"Shader" ofType:@"fsh"];
    if (!compileShader(&fragShader, GL_FRAGMENT_SHADER, 1, fragShaderPathname)) {
        destroyShaders(vertShader, fragShader, program);
        return NO;
    }

        // attach vertex shader to program
    glAttachShader(program, vertShader);

        // attach fragment shader to program
    glAttachShader(program, fragShader);

        // bind attribute locations
        // this needs to be done prior to linking
    glBindAttribLocation(program, ATTRIB_VERTEX, "position");
    glBindAttribLocation(program, ATTRIB_COLOR, "color");

        // link program
    if (!linkProgram(program)) {
        destroyShaders(vertShader, fragShader, program);
        return NO;
    }

        // get uniform locations
    uniforms[UNIFORM_MODELVIEW_PROJECTION_MATRIX] = glGetUniformLocation(program, "modelViewProjectionMatrix");

        // release vertex and fragment shaders
    if (vertShader) {
        glDeleteShader(vertShader);
        vertShader = 0;
    }
    if (fragShader) {
        glDeleteShader(fragShader);
        fragShader = 0;
    }

    return YES;
}

Answer 1

如果 vertShaderPathname为空，这意味着找不到顶点着色器源。在这种情况下，请确保着色器存在于您的项目中，并作为资源捆绑在一起。

要在 xcode 中执行此操作，请转到左侧的树，导航到“Targets->(projname)->Copy Bundle Resources”并确保您有一个“Shader.vsh”。如果它出现在“Compile Sources”中，那么您需要将它拖到“Copy Bundle Resources”中