From aed2806e9db366ebb65693ab1841345629f65698 Mon Sep 17 00:00:00 2001
From: James Chen <dumganhar@gmail.com>
Date: Mon, 18 Nov 2024 17:16:49 +0800
Subject: [PATCH] Type cleanup in particle-system-2d.ts

---
 cocos/particle-2d/particle-system-2d.ts | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/cocos/particle-2d/particle-system-2d.ts b/cocos/particle-2d/particle-system-2d.ts
index 2b40985c812..6562f9eb141 100644
--- a/cocos/particle-2d/particle-system-2d.ts
+++ b/cocos/particle-2d/particle-system-2d.ts
@@ -740,9 +740,9 @@ export class ParticleSystem2D extends UIRenderer {
     private _positionType = PositionType.FREE;
 
     private _stopped = true;
-    private declare _previewTimer;
+    private declare _previewTimer: number | null;
     private declare _focused: boolean;
-    private declare _plistFile;
+    private declare _plistFile: string;
     private declare _tiffReader;
     private _useFile: boolean;
 
@@ -849,7 +849,7 @@ export class ParticleSystem2D extends UIRenderer {
         }
     }
 
-    protected lateUpdate (dt): void {
+    protected lateUpdate (dt: number): void {
         if (!this._simulator.finished) {
             this._simulator.step(dt);
         }
@@ -967,7 +967,7 @@ export class ParticleSystem2D extends UIRenderer {
                     }
                 });
             } else if (dict.textureImageData) {
-                const textureData = dict.textureImageData;
+                const textureData = dict.textureImageData as string;
 
                 if (textureData && textureData.length > 0) {
                     let imgPathName = imgPath;