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uni_modules/x-base642file-s/utssdk/app-android/config.json

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+{
+  "minSdkVersion": "21"
+}

uni_modules/x-base642file-s/utssdk/app-android/index.uts

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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)
+}

uni_modules/x-base642file-s/utssdk/app-harmony/config.json

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+{
+	"dependencies": {
+		"x_library_s": "./lib/x_library_s.har"
+	}
+}

uni_modules/x-base642file-s/utssdk/app-harmony/index.uts

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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);
+	}
+	
+}

uni_modules/x-base642file-s/utssdk/app-ios/PrivacyInfo.xcprivacy

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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>

uni_modules/x-base642file-s/utssdk/app-ios/config.json

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+{
+  "deploymentTarget": "12"
+}

uni_modules/x-base642file-s/utssdk/app-ios/index.uts

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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)
+}

uni_modules/x-base642file-s/utssdk/mp-weixin/index.uts

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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("")
+			}
+		})
+	})
+}

uni_modules/x-base642file-s/utssdk/web/index.uts

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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);
+}