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在 iOS 上工作正常，但在适当的时候不行，也许我做错了什么：

    GLsizei height = _glview.drawableHeight;
    GLsizei width = _glview.drawableWidth;

    if (pickingFramebuffer == 0) {
        glGenFramebuffers(1, &pickingFramebuffer);
    }

    glBindFramebuffer(GL_FRAMEBUFFER, pickingFramebuffer);

    if (pickingColorRenderbuffer == 0) {
        glGenRenderbuffers(1, &pickingColorRenderbuffer);
    }
    glBindRenderbuffer(GL_RENDERBUFFER, pickingColorRenderbuffer);

    glRenderbufferStorage(GL_RENDERBUFFER, GL_RGBA8, width, height);
    glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, pickingColorRenderbuffer);

    if (pickingDepthRenderbuffer == 0) {
        glGenRenderbuffers(1, &pickingDepthRenderbuffer);
    }
    glBindRenderbuffer(GL_RENDERBUFFER, pickingDepthRenderbuffer);
    glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT24, width, height);

    glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, pickingDepthRenderbuffer);

    GLenum status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
    if (status != GL_FRAMEBUFFER_COMPLETE) {
        NSLog(@"Framebuffer status: %x", (int)status);
    }

日志：

Framebuffer status: GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT

非常感谢！

编辑： 如果我将添加到每个人的功能和 opengl 指令 OES，Framebuffer 状态将为0

编辑 2：好的，这是一个错误https://code.google.com/p/apportable/issues/detail?id=3

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