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2026-09-24 16:25:22 +08:00
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+## 1.0.2（2025-07-25）
+* 兼容原生鸿蒙
+## 1.0.1（2025-02-10）
+* 兼容所有平台
+## 1.0.0（2024-11-21）
+* 将base64对象转换为图片文件PNG格式
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+{
+  "id": "x-base642file-s",
+  "displayName": "x-base642file-s",
+  "version": "1.0.0",
+  "description": "x-base642file-s",
+  "keywords": [
+    "x-base642file-s"
+],
+  "repository": "",
+  "engines": {
+    "HBuilderX": "^3.6.8"
+  },
+  "dcloudext": {
+    "type": "uts",
+    "sale": {
+      "regular": {
+        "price": "0.00"
+      },
+      "sourcecode": {
+        "price": "0.00"
+      }
+    },
+    "contact": {
+      "qq": ""
+    },
+    "declaration": {
+      "ads": "",
+      "data": "",
+      "permissions": ""
+    },
+    "npmurl": ""
+  },
+  "uni_modules": {
+    "dependencies": [],
+    "encrypt": [],
+    "platforms": {
+      "cloud": {
+        "tcb": "u",
+        "aliyun": "u",
+        "alipay": "u"
+      },
+      "client": {
+        "Vue": {
+          "vue2": "u",
+          "vue3": "u"
+        },
+        "App": {
+          "app-android": "u",
+          "app-ios": "u",
+          "app-harmony": "u"
+        },
+        "H5-mobile": {
+          "Safari": "u",
+          "Android Browser": "u",
+          "微信浏览器(Android)": "u",
+          "QQ浏览器(Android)": "u"
+        },
+        "H5-pc": {
+          "Chrome": "u",
+          "IE": "u",
+          "Edge": "u",
+          "Firefox": "u",
+          "Safari": "u"
+        },
+        "小程序": {
+          "微信": "u",
+          "阿里": "u",
+          "百度": "u",
+          "字节跳动": "u",
+          "QQ": "u",
+          "钉钉": "u",
+          "快手": "u",
+          "飞书": "u",
+          "京东": "u"
+        },
+        "快应用": {
+          "华为": "u",
+          "联盟": "u"
+        }
+      }
+    }
+  }
+}
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+# x-base642file-s
+
+### 功能介绍
+
+将Base64格式的图片数据转换为本地PNG文件，支持跨平台使用。
+
+### 兼容性
+
+| Harmony | IOS | Android | WEB | 小程序 |
+| --- | --- | --- | --- | --- |
+| 支持 | 支持 | 支持 | 支持 | 支持 |
+
+### API文档
+
+#### toPngFile
+
+`toPngFile(data: string): Promise<string>`
+将Base64格式的图片数据转换为本地PNG文件。
+
+**参数说明：**
+- data: Base64格式的图片数据字符串，支持带前缀（如：data:image/png;base64,）或纯Base64字符串
+
+**返回值：**
+- `Promise<string>`: 返回生成的PNG文件路径
+  - 成功：resolve(文件路径)
+  - 失败：reject(空字符串)
+
+### 平台差异说明
+
+- Android：文件保存在应用的外部缓存目录
+- iOS：文件保存在应用的缓存目录
+- Web：返回Blob URL
+- 小程序：文件保存在小程序用户目录
+
+### 使用示例
+
+```ts
+
+import { toPngFile } from "@/uni_modules/x-base642file-s"
+
+// 示例：将Base64图片转换为本地文件
+const convertToFile = async (base64Data: string) => {
+    try {
+        const filePath = await toPngFile(base64Data)
+        console.log('文件保存成功：', filePath)
+    } catch (error) {
+        console.error('转换失败')
+    }
+}
+```
+
+### 注意事项
+
+1. 使用前，Windows用户需要先在页面引用，打基座，再编译使用
+2. Mac用户可直接引用使用
+3. 建议在处理大量数据时进行适当的性能优化
+4. 生成的文件会保存在各平台对应的缓存目录中，请注意及时清理不需要的文件
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+{
+  "minSdkVersion": "21"
+}
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+import Context from "android.content.Context"
+import Bitmap from "android.graphics.Bitmap"
+import BitmapFactory from "android.graphics.BitmapFactory"
+import Base64 from "android.util.Base64"
+import File from "java.io.File"
+import FileOutputStream from "java.io.FileOutputStream"
+
+export function toPngFile(data : string) : Promise<string>  {
+	let fileName = Math.random().toString(16).substring(2, 16)
+	let baesestrAr = data.split(',') as string[]
+	let base64Data = baesestrAr[1]
+	let fileUrl = ''
+	
+	try {
+		let context = UTSAndroid.getAppContext()!
+		let filepath = context.getExternalCacheDir()?.getPath() ?? ""
+		// 解码Base64字符串
+		let decodedBytes = Base64.decode(base64Data, Base64.DEFAULT)
+		let bitmap = BitmapFactory.decodeByteArray(decodedBytes, 0, decodedBytes.size)
+		let file = new File(filepath, fileName + '.png');
+
+		let fos = new FileOutputStream(file)
+		bitmap.compress(Bitmap.CompressFormat.PNG, 100, fos);
+		fileUrl = file.getPath();
+		
+	} catch (error) {
+		console.error('处理图片错误:', error)
+		//TODO handle the exception
+		return Promise.reject(fileUrl) as Promise<string> 
+	}
+
+	return Promise.resolve(fileUrl)
+}
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+{
+	"dependencies": {
+		"x_library_s": "./lib/x_library_s.har"
+	}
+}
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+import { x_toPngFile } from "x_library_s";
+import { BusinessError } from "@kit.BasicServicesKit";
+
+export function toPngFile(data : string) : Promise<string> {
+	try {
+		const file = x_toPngFile(UTSHarmony.getCurrentWindow()!.getUIContext(),data)
+		return Promise.resolve(file);
+	} catch (error) {
+		const e = error as BusinessError;
+		console.error("TMUI",e.message)
+		return Promise.reject(e.message);
+	}
+	
+}
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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>NSPrivacyAccessedAPITypes</key>
+	<array/>
+	<key>NSPrivacyCollectedDataTypes</key>
+	<array/>
+	<key>NSPrivacyTracking</key>
+	<false/>
+	<key>NSPrivacyTrackingDomains</key>
+	<array/>
+</dict>
+</plist>
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+{
+  "deploymentTarget": "12"
+}
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+import { Data } from 'Foundation';
+import { UIImage } from 'UIKit';
+export function toPngFile(data : string):Promise<string> {
+	let fileName = Math.random().toString(16).substring(2,16)
+	let baesestrAr = data.split(',') as string[]
+	let base64Data = baesestrAr[1]
+	let imageData = new Data(base64Encoded = base64Data)
+	if(imageData==null) return Promise.reject('') as Promise<string>
+	let image = new UIImage(data = imageData!)
+	if(image==null) return Promise.reject('') as Promise<string>
+	let userDir = FileManager.default.urls(for = FileManager.SearchPathDirectory.cachesDirectory, in = FileManager.SearchPathDomainMask.userDomainMask).first!
+	let destinationFileName = fileName + ".png" 
+	let fileURL = userDir.appendingPathComponent(destinationFileName)
+	
+	let isSuccess = UTSiOS.try(imageData!.write(to =fileURL),"?")
+	if(isSuccess==null) return Promise.reject('') as Promise<string>
+	
+	return Promise.resolve(fileURL.path)
+}
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+export function toPngFile(data : string) : Promise<string> {
+	let bdataBase64 = data.split(',')[1]
+	let fileMg = wx.getFileSystemManager();
+	let filepath = `${wx.env.USER_DATA_PATH}/${Math.random().toString(16).substring(4, 20)}.png`
+	return new Promise((res, rej) => {
+		fileMg.writeFile({
+			filePath: filepath,
+			data: bdataBase64,
+			encoding: "base64",
+			success() {
+				res(filepath)
+			},
+			faile() {
+				rej("")
+			}
+		})
+	})
+}
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+// function compressImage(quality:number) : string {
+// 	let base64data = canvas.toDataURL('image/jpeg', attrs.compress / 100);
+// 	return base64data;
+// }
+function base64ToBlob(data : string) : Blob {
+	let bytes = window.atob(data.split(',')[1])
+	let ab = new ArrayBuffer(bytes.length)
+	let ia = new Uint8Array(ab)
+	for (let i = 0; i < bytes.length; i++) {
+		ia[i] = bytes.charCodeAt(i)
+	}
+	// @ts-ignore
+	return new Blob([ab], { type: 'image/jpeg' })
+}
+
+// ,quality:number
+export function toPngFile(data : string) : Promise<string> {
+	let bloblfaile = URL.createObjectURL(base64ToBlob(data));
+	return Promise.resolve(bloblfaile);
+}