I have some features on the map displayed as icons. I want to decide which icons should be hidden and which should be displayed when they collide on a numeric field, that each feature on my map has (see picture). I've found a mapbox property called "symbol-sort-key", but I can't figure out if it's the right thing. symbol-sort-key takes a number, but I don't know to what this number should refer to. Any ideas how to solve this problem?
Yes, symbol-sort-key可能就是你想要的。它用于确定符号的绘制顺序，如果符号重叠且允许碰撞（数字最高获胜），则会影响在顶部绘制哪个符号；如果不允许碰撞，则影响唯一绘制的符号（数字最低获胜） 。
The number文档中指的是数字类型。因此，如果您有一个名为“priority”的数字属性，您可以指定如下内容：
"symbol-sort-key": ["to-number", ["get", "priority"]],