调整zuni-memorywarnin组件中的UTSCallback为普通callback

uni_modules/uni-memorywarning/utssdk/app-android/index.uts

 import { UTSAndroid } from "io.dcloud.uts"
-import { OnMemoryWarning, OffMemoryWarning } from "../interface.uts"
+import { OnMemoryWarning, OffMemoryWarning, MemoryWarningCallback, MemoryWarningCallbackResult } from "../interface.uts"
 
-let listeners: UTSCallback[] = []
+let listeners: MemoryWarningCallback[] = []
 
 const onAppTrimMemoryListener = (ret: number) => {
     listeners.forEach(listener => {
-		let res = {
+      let res: MemoryWarningCallbackResult = {
         level:ret
       }
       listener(res)
@@ -14,7 +14,7 @@ const onAppTrimMemoryListener = (ret: number) => {
 
 
 @Suppress("DEPRECATION")
-export const onMemoryWarning : OnMemoryWarning =  function (callback: UTSCallback) {
+export const onMemoryWarning : OnMemoryWarning =  function (callback: MemoryWarningCallback) {
     if (listeners.length == 0) {
 		// 仅首次执行底层的实际监听
         UTSAndroid.onAppTrimMemory(onAppTrimMemoryListener)
@@ -28,7 +28,7 @@ export const onMemoryWarning : OnMemoryWarning =  function (callback: UTSCallbac
 
 
 @Suppress("DEPRECATION")
-export const offMemoryWarning : OffMemoryWarning = function (callback: UTSCallback | null) {
+export const offMemoryWarning : OffMemoryWarning = function (callback: MemoryWarningCallback | null) {
 	
 	if(callback == null){
 		// 清除全部回调

uni_modules/uni-memorywarning/utssdk/app-ios/index.uts

 import { NotificationCenter } from 'Foundation';
 import { UIApplication } from "UIKit"
 import { Selector } from "ObjectiveC"
-import { OnMemoryWarning, OffMemoryWarning } from "../interface.uts"
+import { OnMemoryWarning, OffMemoryWarning, MemoryWarningCallback, MemoryWarningCallbackResult } from "../interface.uts"
 
 class MemoryWarningTool {
-	static listeners: UTSCallback[] = []
-	
+  static listener: MemoryWarningCallback | null = null
 	// 监听内存警告
-	static listenMemoryWarning(callback: UTSCallback) {
+	static listenMemoryWarning(callback: MemoryWarningCallback) {
 
 		// 只有首次才需要注册监听事件
-		if (this.listeners.length == 0) {
+		if (this.listener == null) {
 			// 注册监听内存警告通知事件及设置回调方法
 			// target-action 回调方法需要通过 Selector("方法名") 构建
 			const method = Selector("receiveMemoryWarning")
 			NotificationCenter.default.addObserver(this, selector = method, name = UIApplication.didReceiveMemoryWarningNotification, object = null)
 		}
-		this.listeners.push(callback)
+    this.listener = callback
 	}
 
 	// 内存警告回调的方法
 	// target-action 的方法前需要添加 @objc 前缀
 	@objc static receiveMemoryWarning() {
 		// 触发回调
-		this.listeners.forEach(listener => {
-			listener({})
-		})
+   let res: MemoryWarningCallbackResult = {
+     level: 0
+   };
+   this.listener?.(res);
 	}
 
 	// 移除监听事件
-	static removeListen(callback: UTSCallback | null) {
-		// 移除所有监听
-		if (callback == null) {
-			this.listeners = []
-			// 移除监听事件
+	static removeListen(callback: MemoryWarningCallback | null) {
+    this.listener = null;
     NotificationCenter.default.removeObserver(this)
-			return
-		}
-		
-		// 清除指定回调
-		const index = this.listeners.indexOf(callback!)
-		if (index > -1) {
-		    this.listeners.splice(index, 1)
-		}
 	}
 }
 
 
 // 开启监听内存警告
-export const onMemoryWarning : OnMemoryWarning =  function (callback: UTSCallback) {
+export const onMemoryWarning : OnMemoryWarning =  function (callback: MemoryWarningCallback) {
 	MemoryWarningTool.listenMemoryWarning(callback)
 }
 
 // 关闭监听内存警告
-export const offMemoryWarning : OffMemoryWarning = function (callback: UTSCallback | null) {
+export const offMemoryWarning : OffMemoryWarning = function (callback: MemoryWarningCallback | null) {
 	MemoryWarningTool.removeListen(callback)
 }

uni_modules/uni-memorywarning/utssdk/interface.uts

+/**
+ * uni.onMemoryWarning/uni.offMemoryWarning回调参数
+ */
+export type MemoryWarningCallbackResult = {
+  /**
+   * 内存警告等级(仅安卓平台有效，iOS始终是0)
+   */
+  level: number
+}
+
+/**
+ * uni.onMemoryWarning/uni.offMemoryWarning回调函数定义
+ */
+export type MemoryWarningCallback = (res: MemoryWarningCallbackResult) => void
 
-export type OnMemoryWarning = (callback: UTSCallback) => void
+export type OnMemoryWarning = (callback: MemoryWarningCallback) => void
 
-export type OffMemoryWarning = (callback : UTSCallback | null) => void
+export type OffMemoryWarning = (callback : MemoryWarningCallback | null) => void
 
 export interface Uni {
 	/**
 	 * 开启监听内存警告
 	 *
-	 * @param {UTSCallback} callback 
+	 * @param {MemoryWarningCallback} callback
 	 * @tutorial https://uniapp.dcloud.net.cn/api/system/memory.html#onmemorywarning
 	 * @uniPlatform {
 	 *    "app": {
@@ -27,11 +41,11 @@ export interface Uni {
 	 * @uniVueVersion 2,3  //支持的vue版本
 	 * @autotest { expectCallback: true }
 	 */
-	onMemoryWarning(callback: UTSCallback) : void,
+	onMemoryWarning(callback: MemoryWarningCallback) : void,
 	/**
 	 * 取消监听内存不足告警事件
 	 *
-	 * @param {UTSCallback} callback 
+	 * @param {MemoryWarningCallback} callback
 	 * @tutorial https://uniapp.dcloud.net.cn/api/system/memory.html#offmemorywarning
 	 * @uniPlatform {
 	 *    "app": {
@@ -51,5 +65,5 @@ export interface Uni {
 	 * @uniVueVersion 2,3  //支持的vue版本
 	 * @autotest { expectCallback: true }
 	 */
-	offMemoryWarning(callback : UTSCallback | null) : void
+	offMemoryWarning(callback : MemoryWarningCallback | null) : void
 }