同问，我也需要加动态图。用了一个方法，但是效果在手机上显示很慢，模拟器还好。看看有没有更好的方法加动态效果。

setInterval(() => {
    // marker脚下的圆圈渐变效果
      for (let i in that.data.circles) {
        if (clearAlert[i]) {  // 汽包是否被点击了？
          if (that.data.circles[i].radius < 500) {
            that.data.circles[i].radius += 25;
            let newColor = that.data.circles[i].fillColor;
            if (newColor == "#FF0000") {
              newColor = "#FF4500";
            } else if (newColor == "#FF4500") {
              newColor = "#FF6347"
            } else if (newColor == "#FF6347") {
              newColor = "#F08080";
            } else if (newColor == "#F08080") {
              newColor = "#FF0000";
            };
            that.data.circles[i].color = newColor;
            that.data.circles[i].fillColor = newColor;
          } else {
            that.data.circles[i].radius = 0;
            that.data.circles[i].color = "#FF0000";
            that.data.circles[i].fillColor = "#FF0000";
          };
        } else {
          that.data.circles[i].radius = 0;
        };
      };
      that.setData({
        markers: that.data.mapData,
        circles: that.data.circles
      })
    }, n);