在iOS编程中将Base64图像转换为文件路径图像

Convert Base64 image to file path image in iOS programming

本文关键字：图像 转换 文件 路径 Base64 iOS 编程      更新时间：2023-09-26

我正在使用从base64到字符串的转换，而我需要它作为iOS本机插件中的图像文件路径

在 android 中像这样的东西正在将位图转换为文件，我需要它在 iOS 中的替代品

 private String convertBitmapToFile(Bitmap photo)

由于我将 base64 转换为字符串的代码没有调用回调方法"profileBase64Callback"

 plugin call://here citizen.profileImage is in base64 format
 myPlugin.convertToFile("profileBase64Callback", citizen.profileImage,  function(){ }, function(){ });

Nativeplugin.m

 - (void)convertToFile:(CDVInvokedUrlCommand *)command{
      NSDictionary* options = [[NSDictionary alloc]init];
      if ([command.arguments count] > 0) {
          options = [command argumentAtIndex:0];
          NSString *base64Data =[options objectForKey:@"base64"];
          NSLog(@"strttrtr :%@", base64Data);
    }
      NSData* data = [[NSData alloc] initWithBase64EncodedString: base64Data options:0];
      NSString *strCOnvert = [NSString base64StringFromData:data length:[data length]];//Instead of this string I want decoded format(file path) to send to javascript Or if any other format which fixes my issue

   dispatch_async(dispatch_get_main_queue(), ^{
    CDVPluginResult* pluginResult = [CDVPluginResult resultWithStatus:CDVCommandStatus_OK messageAsString:strCOnvert];
    [pluginResult setKeepCallbackAsBool:true];
    [self.commandDelegate sendPluginResult:pluginResult callbackId:command.callbackId];      
    NSString * jsCallBack = [NSString stringWithFormat:@"%@(%@);", @"profileBase64Callback", strCOnvert];
    [self.webView stringByEvaluatingJavaScriptFromString:jsCallBack];
});

调用 JavaScript 方法执行：

         //Need this imageURI after conversion which I am unable to convert
        function profileBase64Callback(imageURI){
             console.log("profileImage path " );
            //updating to database
             updateCitizenValue("profileImage", imageURI);
             setTimeout(getCitizen(function(citizenVal){
          }), 5000);
 }//this method is not called due to error in conversion.

谁能让我知道我哪里出错了..尝试将 base64 格式的图像解码和图像转换为实际文件

下面的代码解决了我的问题：

- (void)convertToFile:(CDVInvokedUrlCommand *)command{
    NSDictionary* options = [[NSDictionary alloc]init];
    NSString *base64String;
    if ([command.arguments count] > 0) {
        options = [command argumentAtIndex:0];
        base64String = [options objectForKey:@"base64"];
        methodname1 =[options objectForKey:@"callback"];
    }
    NSData* data = [[NSData alloc] initWithBase64EncodedString:methodname1 options:0];
   NSString  *jpgPath = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents/Test.png"]; 
  /*
    identify the home directory and file name
   */
  NSLog(@"----jpgPath--%@",jpgPath);
  [data writeToFile:jpgPath atomically:YES];

   /*
   Send resulting data to cordova plugin
   */
     dispatch_async(dispatch_get_main_queue(), ^{
    CDVPluginResult* pluginResult = [CDVPluginResult resultWithStatus:CDVCommandStatus_OK messageAsString:@"OK"];
    [pluginResult setKeepCallbackAsBool:true];
    [self.commandDelegate sendPluginResult:pluginResult callbackId:command.callbackId];
    NSString * jsCallBack = [NSString stringWithFormat:@"%@(%@);", @"profileBase64Callback", jpgPath];
    [self.webView stringByEvaluatingJavaScriptFromString:jsCallBack];
    });
 }
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