const { ccclass , property } = cc . _decorator ; @ ccclass export default class CircleAvatar extends cc . Component { @ property ( cc . Sprite ) rectAvatar : cc . Sprite = null ; start ( ) { this . rectAvatar . getMaterial ( 0 ) . setProperty ( 'wh_ratio' , this . rectAvatar . node . width / this . rectAvatar . node . height ) ; } }