JumpGame/assets/Script/Character/Parabola.ts

// Learn TypeScript:
//  - https://docs.cocos.com/creator/2.4/manual/en/scripting/typescript.html
// Learn Attribute:
//  - https://docs.cocos.com/creator/2.4/manual/en/scripting/reference/attributes.html
// Learn life-cycle callbacks:
//  - https://docs.cocos.com/creator/2.4/manual/en/scripting/life-cycle-callbacks.html

const { ccclass, property } = cc._decorator;

@ccclass
export default class Parabola extends cc.Component {

    ParabolaID: number = 1000


    prefab: cc.Node = null
    start() {
        const url = `Parabola/${this.ParabolaID}`
        cc.resources.load(url, cc.SpriteFrame, (err, SpriteFrame) => {
            if (err) {
                return
            }
            let SubNode = new cc.Node()
            SubNode.addComponent(cc.Sprite).spriteFrame = SpriteFrame
            SubNode.setAnchorPoint(0.5, 0.5)
            SubNode.setScale(0.8)
            this.prefab = SubNode
        });
    }



    ChildIndex: number = 0
    circle(x: number, y: number) {
        if (this.node.children[this.ChildIndex]) {
            this.node.children[this.ChildIndex].setPosition(x, y)
            this.node.children[this.ChildIndex].active = true
        } else {
            let temp = cc.instantiate(this.prefab)

            temp.parent = this.node
            temp.active = true
            temp.setPosition(x, y)
     
        }

        this.ChildIndex++
    }


    clear() {
        this.ChildIndex = 0

        this.node.children.forEach(e => { e.active = false })
    }
    // update (dt) {}
}