platform.ready() 方法未在使用 ionic 的 Android 设备中触发

Posted 2023-04-19

【中文标题】platform.ready() 方法未在使用 ionic 的 Android 设备中触发

【英文标题】：platform.ready() method is not firing in Android device using ionic

【发布时间】：2021-09-15 23:47:39

【问题描述】：

我正在开发一个可以上传、下载和删除附件的 Ionic 应用程序 这里我使用平台内部的文件插件。 ready() 并构建 APK。当我在 android 设备上运行 APK 时，Platform.ready 中的代码没有被触发是什么问题？？？

 import  Platform  from '@ionic/angular';
 import  File  from '@ionic-native/file/ngx';
 constructor(private cFile: File,private platform: Platform)
 DownloadAttachment()
 
  var buffer = pFilebytearray.replace(/\"/g, "");
var byteCharacters = atob(buffer);
var byteNumbers = new Array(byteCharacters.length);
for (var i = 0; i < byteCharacters.length; i++) 
  byteNumbers[i] = byteCharacters.charCodeAt(i);

this.cFile.dataDirectory
var byteArray = new Uint8Array(byteNumbers);
let aType: any = "";
let aMimeTypeJson =  as any;
aMimeTypeJson = this.GetMimeType(pAttachmentType.toLowerCase())
aType = aMimeTypeJson.MimeType;
var blob1 = new Blob([byteArray],  type: aType );
alert("completed the Name Seperation and Blob Creation")
 this.platform.ready().then(() => 
  alert("Download Starts...");
  let result = this.cFile.createDir(this.cFile.externalDataDirectory, "Documents", true).then(data => 
    let dirpath = data.toURL();
    alert("Dir created at" + dirpath);
    this.cFile.writeFile(dirpath, pAttachmentName, blob1,  replace: true )
      .then((Result) => 
        this.MessageDialog("Message", "Attachment downloaded " + dirpath, false, true);
      , (error) => 
        this.MessageDialog("Message", "Attachment not downloaded", false, true);
      );

  ).catch(error => 
    alert("error" + error);

  );


)

 

【问题讨论】：

platform.ready()需要什么？尝试使用platform.ready() 下载您的文件。或将您的完整功能包装在platform.ready()

【参考方案1】：

使用异步后为我解决的错误，等待。这使得代码等到平台准备好

async AttachmentDownload(pFilebytearray, pAttachmentType, pAttachmentName): Promise<void> 
    alert("entering AttachmentDownload")
    var buffer = pFilebytearray.replace(/\"/g, "");
    var byteCharacters = atob(buffer);
    var byteNumbers = new Array(byteCharacters.length);
    for (var i = 0; i < byteCharacters.length; i++) 
      byteNumbers[i] = byteCharacters.charCodeAt(i);
    
    this.cFile.dataDirectory
    var byteArray = new Uint8Array(byteNumbers);
    let aType: any = "";
    let aMimeTypeJson =  as any;
    aMimeTypeJson = this.GetMimeType(pAttachmentType.toLowerCase())
    aType = aMimeTypeJson.MimeType;
    var blob1 = new Blob([byteArray],  type: aType );
    alert("completed the Name Seperation and Blob Creation")
    await this.platform.ready().then(() => 
      alert("Download Starts...");
      let result = this.cFile.createDir(this.cFile.externalDataDirectory, "Documents", true).then(data => 
        let dirpath = data.toURL();
        alert("Dir created at" + dirpath);
        this.cFile.writeFile(dirpath, pAttachmentName, blob1,  replace: true )
          .then((Result) => 
            this.MessageDialog("Message", "Attachment downloaded " + dirpath, false, true);
          , (error) => 
            this.MessageDialog("Message", "Attachment not downloaded", false, true);
          );

      ).catch(error => 
        alert("error" + error);

      );
    )