Question

我无法使用cordova-plugin-file在iOS 12中写入文件。将应用程序部署到运行iOS 11.4的iPhone 7 Plus时，该代码对我有用。我要做的就是从照片库中选择一个文件并将其保存到数据目录中。

从库中成功选择文件后，这是用于写入数据目录的代码。

writeToFile(fileName, data) {

    return new Promise((resolve, reject) => {
      if (this.isBrowser) {
        return resolve({});
      }
    const self = this;
      window.resolveLocalFileSystemURL(cordova.file.dataDirectory, function (directoryEntry) {
        directoryEntry.getFile(fileName, {
          create: true
        }, function (fileEntry) {
          fileEntry.createWriter(function (fileWriter) {
            console.log('THIS IS PRINTING: Inside fileEntry.createWriter promise');
            fileWriter.onwriteend = function (e) {
              console.log('NOT PRINTING: Inside fileWriter.onwriteend promise');
              return resolve(fileName);
            };

            fileWriter.onerror = function (e) {
              return reject(e);
              // you could hook this up with our global error handler, or pass in an error callback
            };
            const blob = new Blob([data], {
              type: 'image/png'
            });
            fileWriter.write(blob);
          }, self.fileErrorHandler.bind(null, fileName));
        }, self.fileErrorHandler.bind(null, fileName));
      }, self.fileErrorHandler.bind(null, fileName));
    });
  }

我将文件的本地URL作为数据参数传递给函数。我尝试将其更改为字符串，并将blob的类型更改为text / plain。但这也无济于事。

我的config.xml中的代码片段

<preference name="iosPersistentFileLocation" value="Library" />
    <platform name="ios">
        <edit-config file="*-Info.plist" mode="merge" target="NSCameraUsageDescription">
            <string>need camera access to take pictures</string>
        </edit-config>
        <edit-config file="*-Info.plist" mode="merge" target="NSPhotoLibraryUsageDescription">
            <string>need photo library access to get pictures from there</string>
        </edit-config>
        <edit-config file="*-Info.plist" mode="merge" target="NSLocationWhenInUseUsageDescription">
            <string>need location access to find things nearby</string>
        </edit-config>
        <edit-config file="*-Info.plist" mode="merge" target="NSPhotoLibraryAddUsageDescription">
            <string>need photo library access to save pictures there</string>
        </edit-config>
    </platform>

让我感到很有趣的是，该代码在我的iPhone 7 Plus（在iOS 11.4上）能完美运行，但是当我尝试在运行iOS 12的iPhone XR上运行时，不会触发FileWriter onwriteend。尝试捕获所有错误，并且没有出现错误。

我还在XCode控制台中看到此错误

2019-06-23 10:28:51.806034-0400 Magically[30751:2758873] [discovery]
 errors encountered while discovering extensions: Error Domain=PlugInKit 
Code=13 "query cancelled" 
UserInfo={NSLocalizedDescription=query cancelled}

作为一种解决方法，我正在考虑从图像URL创建Blob，并将其保存到本地存储中。

可以帮忙吗？

cordova-plugin-file错误：无法在iOS 12中写入文件

0 个答案: