通过左上角的按钮可以动态创建物体并添加
<img src="https://img.blog.csdn.net/20160229231505521?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" alt="" style="font-family: KaiTi_GB2312;" /><img src="https://img.blo
