cocos creator 3.x 精灵不显示以及加载动态图片

精灵不显示：

不要在空节点下直接添加组件
正确的做法是：在空节点（Node）上右键创建一个精灵才会给看到 或者直接拖曳一个图片放到场景编辑器中也可

cocos creator 3.x图片加载

我是没想到这个玩意和2.4版本完全不同的 我踩了整整3个小时的坑
代码如下

import { _decorator, Component, Node,resources,SpriteFrame,Sprite,ImageAsset, Texture2D, sp } from 'cc';
const { ccclass, property } = _decorator;

/**
 * Predefined variables
 * Name = NewComponent
 * DateTime = Thu Jan 13 2022 20:43:55 GMT+0800 (中国标准时间)
 * Author = sxtsxts
 * FileBasename = NewComponent.ts
 * FileBasenameNoExtension = NewComponent
 * URL = db://assets/NewComponent.ts
 * ManualUrl = https://docs.cocos.com/creator/3.3/manual/zh/
 *
 */
 
@ccclass('NewComponent')
export class NewComponent extends Component {
    // [1]
    // dummy = '';

    // [2]
    // @property
    // serializableDummy = 0;

    start () {
        let self = this
        resources.load("test/ddd",function(err,imageAsset:ImageAsset){
            console.log(self.getComponent(Sprite).spriteFrame);
            let spriteFrame = new SpriteFrame();
            let texture = new Texture2D();
            console.log(imageAsset)
            texture.image = imageAsset;
            spriteFrame.texture = texture;
            // console.log(spriteFrame);
            self.node.getChildByName("Sprite").getComponent(Sprite).spriteFrame = spriteFrame
            // console.log(self.getComponent(Sprite).spriteFrame);
            // (self.getComponent(Sprite)as Sprite).spriteFrame = spriteFrame;
            // console.log(self.getComponent(Sprite).spriteFrame);
         });
    }

    // update (deltaTime: number) {
    //     // [4]
    // }
}

/**
 * [1] Class member could be defined like this.
 * [2] Use `property` decorator if your want the member to be serializable.
 * [3] Your initialization goes here.
 * [4] Your update function goes here.
 *
 * Learn more about scripting: https://docs.cocos.com/creator/3.3/manual/zh/scripting/
 * Learn more about CCClass: https://docs.cocos.com/creator/3.3/manual/zh/scripting/ccclass.html
 * Learn more about life-cycle callbacks: https://docs.cocos.com/creator/3.3/manual/zh/scripting/life-cycle-callbacks.html
 */