动态加载网络字体文件

// 下载字体文件到指定沙箱路径下 
  download() { 
    let downloadPath = this.filePath + '/' + this.zipName; 
    console.warn('chisj debug : downloadPath = ', downloadPath); 
    try { 
      request.downloadFile(getContext(), 
        { url: 'http://11.bkillptdown.balanala.cn:8066/1408/Pacifico.bkill.com.zip', filePath: downloadPath }) 
        .then((data: request.DownloadTask) => { 
          let downloadTask: request.DownloadTask = data; 
          let completeCallback = () => { 
            this.toast('已经下载了字体文件.') 
            // 下载完成 
            console.info('Download task completed.'); 
            // 确认下下载的文件是否存在 
            let exist = fs.accessSync(downloadPath); 
            console.warn('chisj debug : ', downloadPath, ' exist = ', exist); 
            this.toast(downloadPath + '确认文件存在' + exist); 
          }; 
          downloadTask.on('complete', completeCallback); 
        }).catch((err: BusinessError) => { 
        console.error(`Failed to request the download. Code: ${err.code}, message: ${err.message}`); 
      }) 
    } catch (err) { 
      console.error(`Failed to request the download. err: ${JSON.stringify(err)}`); 
    } 
  }

unzip() { 
    let context = getContext(this); 
    try { 
      let zipPath = this.filePath + '/' + this.zipName; 
      let exist = fs.accessSync(zipPath) 
      if (!exist) { 
        console.warn('zipFile not exist'); 
        this.toast(zipPath + '不存在') 
        // let file: ESObject = fs.openSync(zipPath, fs.OpenMode.CREATE | fs.OpenMode.READ_WRITE) 
        // fs.writeSync(file.fd, context.resourceManager.getRawFileContentSync('Pacifico.zip').buffer); // 以同步方法将数据写入文件 
        // fs.fsyncSync(file.fd); // 以同步方法同步文件数据。 
        // fs.closeSync(file.fd); 
        return; 
      } 
      console.warn(zipPath, ' is exist'); 
  
      let outputPath = this.filePath + this.fontPath; 
      console.warn('outputPath is ', outputPath); 
      // 目录不存在，把本地证书解压到目标目录 
      fs.mkdirSync(outputPath) 
      let options: zlib.Options = { 
        level: zlib.CompressLevel.COMPRESS_LEVEL_DEFAULT_COMPRESSION 
      }; 
      zlib.decompressFile(zipPath, outputPath, options, (errData: BusinessError) => { 
        if (errData) { 
          console.warn('decompress file error: ', errData); 
          this.toast('解压文件失败' + errData); 
        } else { 
          console.warn('decompress file success'); 
          this.toast('解压文件成功'); 
        } 
      }) 
    } catch (err) { 
      console.warn('unzip file fail:' + err) 
    } 
  }

Button('goto next page') 
          .fontFamily('Pacifico') 
          .onClick(() => { 
            let fontPath = 'file:/' + this.filePath + this.fontPath + '/' + this.fontName; 
            console.warn('fontPath is = ', fontPath); 
            router.pushUrl({ 
              url: 'pages/NextPage', 
              params: new FontPath(fontPath) 
            }) 
          })

aboutToAppear(): void { 
    let filePath: string = (router.getParams() as FontPath).filePath; 
    let exist = fs.accessSync(filePath); 
    console.warn('chisj debug : ', filePath, ' exist = ', exist); 
    font.registerFont({ 
      familyName: 'Pacifico', 
      familySrc: 'file://data/storage/el2/base/haps/entry/files/font/Pacifico.ttf' 
    }) 
  } 
   
   
Text('back first page') 
          .fontSize(50) 
          .fontWeight(FontWeight.Bold) 
          .fontFamily('Pacifico') 
          .onClick(() => { 
            router.back(); 
          })