HomeKit - 不改变灯泡颜色

I am making an app that uses HomeKit enabled lights for notifications. When I write a new value to the hue characteristic of a lightbulb, the color is transitioned from it's current hue to the hue written. So instead of going from it's currently color (let's say Red) immediately to the written color (let's say Purple) it goes from Red, Pink to Purple as well as all the "in between" colors.I am making an app that uses HomeKit enabled li