在CCEGLViewProtocol.h中提供方法：
virtual void setDesignResolutionSize(float width, float height, ResolutionPolicy resolutionPolicy);
其中前面两个参数即为当前解决方案的长宽，第三个参数定义如下：enum ResolutionPolicy
{
// The entire application is visible in the specified area without trying to preserve the original aspect ratio.
// Distortion can occur, and the application may appear stretched or compressed.
kResolutionExactFit,
// The entire application fills the specified area, without distortion but possibly with some cropping,
// while maintaining the original aspect ratio of the application.
kResolutionNoBorder,
// The entire application is visible in the specified area without distortion while maintaining the original
// aspect ratio of the application. Borders can appear on two sides of the application.
kResolutionShowAll,
// The application takes the height of the design resolution size and modifies the width of the internal
// canvas so that it fits the aspect ratio of the device
// no distortion will occur however you must make sure your application works on different
// aspect ratios
kResolutionFixedHeight,
// The application takes the width of the design resolution size and modifies the height of the internal
// canvas so that it fits the aspect ratio of the device
// no distortion will occur however you must make sure your application works on different
// aspect ratios
kResolutionFixedWidth,
kResolutionUnKnown,
};
google翻译一下：1. kResolutionExactFit：整个应用程序在指定区域中可见，而不尝试保留原始长宽比，可能发生失真，可能会显示拉伸或者压缩
2. kResolutionNoBorder：整个应用程序填充指定的区域，没有失真，但可能有一些裁剪，保持原始长宽比
3. kResolutionShowAll：显示所有内容，保持长宽比，会显示黑边
4. kResolutionFixedHeight：保持height的数据适配，width会超出屏幕或者黑边
5. kResolutionFixedWidth：保持width的数据适配，height会超出屏幕或者黑边
6. kResolutionUnKnown：此版本不支持此参数。
