我正在尝试将 base64 字符串保存到库中。当我调用这个插件时，我的代码崩溃了。这是我用来 check 的链接.

我使用的代码

let options:Base64ToGalleryOptions = { prefix: '_img',mediaScanner: true }

   //after the below line my gets close automatically any idea
      this.base64ToGallery.base64ToGallery(base64Image[1],options)
      .then(
        res => {
          debugger
          console.log('Saved image to gallery ', res)
        },
        err => {
          debugger
          console.log('Error saving image to gallery ', err)
        });

I am not able to debug

我不明白为什么我的应用程序在点击此代码后自动关闭

更新:

安装此特定版本的插件后

 ionic cordova plugin add cordova-base64-to-gallery@2.0.2

并将我的代码移至平台

this.platform.ready().then(() => {

      this.base64ToGallery.base64ToGallery(base64Image,options)
      .then(
        res => {
          console.log('Saved image to gallery ', res);
          this.navCtrl.pop();
        },
        err => { //For ios i am getting as `plugin_not_installed`
          console.log('Error saving image to gallery ', err);
          this.navCtrl.pop()
        });

    })

但是根据文档，同样的代码不适用于 ios 我已经安装了同样支持 ios 的版本 (2.0.2) 但它看起来缺少一些东西，如果有的话请告诉我

最佳答案

由于您无法在此处进行调试，因此我遇到了三个问题，直到我让它工作为止，如果是在 Android 上，很可能是第二个问题，如果是在 iOS 上，则很可能是第三个问题。

1) Error saving image to gallery cordova_not_available

解决此问题的方法是创建一个使用命令 ionic start blank --cordova 嵌入了 cordova 的项目。

2) Error saving image to gallary Error while saving image我在 Android 设备上收到此错误消息。我在这里查看了他们的代码实现 https://github.com/Nexxa/cordova-base64-to-gallery/blob/2f531aaa0bf17b900cf6bd9704082e72f183d325/src/android/Base64ToGallery.java

看到他们没有对 WRITE_EXTERNAL_STORAGE 权限做任何事情。

我的解决方案是添加 AndroidPermissions 并在运行时检查 WRITE_EXTERNAL_STORAGE 权限。

hasWriteAccess: boolean = false;
constructor(private base64ToGallery: Base64ToGallery,
   private androidPermissions: AndroidPermissions) {
}

ionViewWillEnter() {
   this.checkPermissions();
}

checkPermissions() {
   this.androidPermissions
   .checkPermission(this.androidPermissions
   .PERMISSION.WRITE_EXTERNAL_STORAGE)
   .then((result) => {
    console.log('Has permission?',result.hasPermission);
    this.hasWriteAccess = result.hasPermission;
  },(err) => {
      this.androidPermissions
        .requestPermission(this.androidPermissions
        .PERMISSION.WRITE_EXTERNAL_STORAGE);
   });
   if (!this.hasWriteAccess) {
     this.androidPermissions
       .requestPermissions([this.androidPermissions
       .PERMISSION.WRITE_EXTERNAL_STORAGE]);
   }
}

saveImage() {
   if (!this.hasWriteAccess) {
     this.checkPermissions();
   }
   let options: Base64ToGalleryOptions = {
     prefix: '_img', 
     mediaScanner: true
   };
   this.base64ToGallery
     .base64ToGallery(this.base64Data, options).then(
     res => console.log('Saved image to gallery:', res),
     err => console.log('Error saving image to gallery:', err)
   );
}

3) This app has crashed because it attempted to access privacy-sensitive data without a usage description. The app's Info.plist must contain an NSPhotoLibraryAddUsageDescription key with a string value explaining to the user how the app uses this data.

解决方案是添加NSPhotoLibraryAddUsageDescription到嵌套在 <platform name="ios"> and </platform> 之间的 project_name/config.xml

<config-file parent="NSPhotoLibraryAddUsageDescription" target="*-Info.plist">
    <string>Saves images from base64 to your Photo Library</string>
</config-file>

关于javascript - Ionic3:Base64 To Gallery 插件使应用程序崩溃，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/50268958/