如何在离子中保存斑点

Question

我是离子框架的新手，实际上我将字节数组作为后端服务的响应并将其转换为blob。如何将其保存到离子中的PDF？

var blob = new Blob([res], { type: 'application/pdf' });

此处是服务中的响应（字节数组）。

代码

var blob = new Blob([res], { type: 'application/pdf' });         
        let fileName="Receipt.pdf";         
        let filePath = (this.platform.is('android')) ? 
        this.file.externalRootDirectory : this.file.cacheDirectory;
        this.file.writeFile(filePath, fileName, blob, { replace: true }).then((fileEntry) => {
          console.log("File created!");          
          this.fileOpener.open(fileEntry.toURL(), 'application/pdf')
            .then(() => console.log('File is opened'))
            .catch(err => console.error('Error openening file: ' + err));
        })
          .catch((err) => {
            console.error("Error creating file: " + err);
            throw err;  
          });

预先感谢。

Answer 1

为了保存PDF，您需要使用一些Cordova插件。Ionic在这里周围有一些不错的包装纸。查看文件，文件传输和文件开启器插件。

以下是一些示例代码，一旦将这些插件包含在项目中：

    var blob = new Blob([res], { type: 'application/pdf' });
    //Determine a native file path to save to
    let filePath = (this.appConfig.isNativeAndroid) ? this.file.externalRootDirectory : this.file.cacheDirectory;
    //Write the file
    this.file.writeFile(filePath, fileName, blob, { replace: true }).then((fileEntry: FileEntry) => {
      console.log("File created!");
      //Open with File Opener plugin
      this.fileOpener.open(fileEntry.toURL(), data.type)
        .then(() => console.log('File is opened'))
        .catch(err => console.error('Error openening file: ' + err));
    })
      .catch((err) => {
        console.error("Error creating file: " + err);
        throw err;  //Rethrow - will be caught by caller
      });