在手机屏幕中央生成一个准心，准心可以由方向键控制移动方向，开火键控制射击，只要将准心移动到猎物上，按下开火键即可射中猎物。-The center of the screen in the mobile phone to generate a quasi-heart, the heart can be quasi-arrow keys to control direction of movement, opened fire on key control shooting, as long as