project_ios/assets/Scripts/gcommon/UIManager.ts

import { _decorator,instantiate,Prefab ,Node,find} from 'cc';
import { GameMng } from '../GameMng';
import { user_info_view } from '../Main/user_info_view';
import { userData } from '../UserData/userData';
import { ResMng } from './ResMng';
const { ccclass, property } = _decorator;

@ccclass('UIManager')
export class UIManager {
    private static _instance: UIManager | null = null;
    private static topLayerList:Node[] = [];
    private constructor() {

    }
    public static get Instance() {
        if (UIManager._instance === null)
            UIManager._instance = new UIManager();
        return UIManager._instance;
    }

    public static AddPrefab(_prefab:Prefab,parent: any = null): Node {
        let prefab = instantiate(_prefab);
        if (parent == null) {
            parent = UIManager.Instance.TopLayer;
            if(_prefab.name==="UILoading"||_prefab.name==="waitView"||_prefab.name==="Dialog"){
                this.pushLayer(prefab)
                console.log("_prefab name ",_prefab.name)
            }
    
        }
        parent.addChild(prefab);
        return prefab;
    }
    
    public static addUserInfoViewPrefab(user_data:userData): Node {
        let prefab = instantiate(GameMng.Instance.uiuserinfo);
        let parent:Node =  UIManager.Instance.TopLayer;
        parent.addChild(prefab);
        prefab.getComponent(user_info_view).show(user_data)
        return prefab;
    }

    private topLayer: any = null;
    public get TopLayer() {
        this.topLayer = find("Canvas");
        return this.topLayer;
    }
    public static removeLoadingLayer() {
        console.log("removeLoadingLayer")
        for (let index = 0; index < this.topLayerList.length; index++) {
            const element =  this.topLayerList[index];
            if(element){
                console.log("element.name",element.name)
                if(element.name == "UILoading"){
                    element.destroy()
                    this.topLayerList[index] = null;
                }
            }
        }
    }
    public static removeWaitViewLayer() {
        for (let index = 0; index < this.topLayerList.length; index++) {
            const element =  this.topLayerList[index];
            if(element){
                console.log("element.name",element.name)
                if(element.name==="waitView"){
                    element.destroy()
                    this.topLayerList[index] = null;
                }
            }
        }
    }

    public static removeDialogViewLayer() {
        for (let index = 0; index < this.topLayerList.length; index++) {
            const element =  this.topLayerList[index];
            if(element){
                console.log("element.name",element.name)
                if(element.name==="Dialog"){
                    element.destroy()
                    this.topLayerList[index] = null;
                }
            }
        }
    }

    public static pushLayer(layer:Node){
        for (let index = 0; index < this.topLayerList.length; index++) {
            if(this.topLayerList[index]==null){
                this.topLayerList[index] = layer;
                return;
            }
           
        }   
        return this.topLayerList.push(layer)
    }
}