用JS 把原先图例的SVG图形属性改了就可以了.
原来的属性:<path d="M16.1709434,8 C22.8819622,8 28.7582258,11.4603001 32.0001952,16.6386156 L21.5039708,22.5334633 C20.579905,20.4209885 18.4632188,18.9439669 15.9997895,18.9439669 C13.3586911,18.9439669 11.1161556,20.6417249 10.3145981,23.0001357 L-0.000152222903,17.2080129 C3.15904804,11.7155231 9.21683346,8 16.1709434,8 Z" transform="translate(0,-7.333333333333333) scale(0.4583333333333333)" style="fill: rgb(219, 172, 93); fill-opacity: 1; stroke-opacity: 1;"></path>
修改为:<path d="M0,0L12,0L12,12L0,12Z" transform="translate(1.1000000000000005,-6.2333333333333325)" style="fill: rgb(76, 154, 255); fill-opacity: 1; stroke-opacity: 1;"></path>
我尝试修改了一个,如下图: