将使用相机拍摄的照片捕获并存储到本地数据库/PhoneGap/Cordova/iOS

Question

我目前正在使用 Phonegap/Cordova 和 jQuerymobile 为 iOS 构建一个应用程序。这个想法是用相机拍照并存储捕获的图像以供将来使用。我想将路径/文件名存储到我的本地数据库中，并将图片文件移动到 iPhone 中的一个持久位置。

谁能给我一个例子？

Answer 1

好的，这就是解决方案。

• 在 Html 文件中

• 我有一个图像标签，用于显示相机拍摄的照片：

• 我有一个按钮可以运行拍照功能： 拍照

• 拍照的功能是（拍照时，'smallImage' id的scr填充了照片的路径）

  function capturePhoto() {
  // Take picture using device camera and retrieve image as base64-encoded string
      navigator.camera.getPicture(onPhotoDataSuccess, onFail, { quality: 50 });
  }
  
  //Callback function when the picture has been successfully taken
  function onPhotoDataSuccess(imageData) {                
      // Get image handle
      var smallImage = document.getElementById('smallImage');
  
      // Unhide image elements
      smallImage.style.display = 'block';
      smallImage.src = imageData;
  }
  
  //Callback function when the picture has not been successfully taken
  function onFail(message) {
      alert('Failed to load picture because: ' + message);
  }
  

• 现在我想将图片移动到一个永久文件夹中，然后将链接保存到我的数据库中：

  function movePic(file){ 
      window.resolveLocalFileSystemURI(file, resolveOnSuccess, resOnError); 
  } 
  
  //Callback function when the file system uri has been resolved
  function resolveOnSuccess(entry){ 
      var d = new Date();
      var n = d.getTime();
      //new file name
      var newFileName = n + ".jpg";
      var myFolderApp = "EasyPacking";
  
      window.requestFileSystem(LocalFileSystem.PERSISTENT, 0, function(fileSys) {      
      //The folder is created if doesn't exist
      fileSys.root.getDirectory( myFolderApp,
                      {create:true, exclusive: false},
                      function(directory) {
                          entry.moveTo(directory, newFileName,  successMove, resOnError);
                      },
                      resOnError);
                      },
      resOnError);
  }
  
  //Callback function when the file has been moved successfully - inserting the complete path
  function successMove(entry) {
      //I do my insert with "entry.fullPath" as for the path
  }
  
  function resOnError(error) {
      alert(error.code);
  }
  

• 我的文件已保存在数据库中以显示它，我将“file://”放在包含图像 src 的行的前面

希望对您有所帮助。 J.

附： ： - 非常感谢 Simon Mac Donald (http://hi.im/simonmacdonald) 在 googledocs 上的帖子。

Answer 2

杰罗姆的回答就像一个魅力..当人们想要使用该文件时，唯一要指出的就是不要使用 entry.fullPath 因为这有时会导致问题，使用 entry.toURL() 因为这会给您无需在路径中添加“file://”即可获得完整路径，也无需绕过 SD 卡存储等问题。

Answer 3

if (index == '0')
{
    var options = {
        quality: 50,
        destinationType: Camera.DestinationType.FILE_URI,
        sourceType: Camera.PictureSourceType.CAMERA,
        allowEdit: false,
        encodingType: Camera.EncodingType.JPEG,
        popoverOptions: CameraPopoverOptions,
        saveToPhotoAlbum: false,
        correctOrientation:true
    };

    $cordovaCamera.getPicture(options).then(movePic,function(imageData) {
        $rootScope.imageUpload=imageData;
    }, function(err) {
        console.error(err);
    });

    function movePic(imageData){
        console.log("move pic");
        console.log(imageData);
        window.resolveLocalFileSystemURL(imageData, resolveOnSuccess, resOnError);
    }

    function resolveOnSuccess(entry){
        console.log("resolvetosuccess");

        //new file name
        var newFileName = itemID + ".jpg";
        var myFolderApp = "ImgFolder";

        window.requestFileSystem(LocalFileSystem.PERSISTENT, 0, function(fileSys) {
            console.log("folder create");

            //The folder is created if doesn't exist
            fileSys.root.getDirectory( myFolderApp,
                {create:true, exclusive: false},
                function(directory) {
                    console.log("move to file..");
                    entry.moveTo(directory, newFileName,  successMove, resOnError);
                    console.log("release");

                },
                resOnError);
        },
        resOnError);
    }

    function successMove(entry) {
        //I do my insert with "entry.fullPath" as for the path
        console.log("success");
        //this is file path, customize your path
        console.log(entry);
    }

    function resOnError(error) {
        console.log("failed");
    }

}

Answer 4

根据上面 Jérôme 的回答，我刚刚做了一个适用于 Promise 的方法：

function moveFile(file){

    var deferred = $q.defer();

    window.resolveLocalFileSystemURL(file,
        function resolveOnSuccess(entry){

            var dateTime = moment.utc(new Date).format('YYYYMMDD_HHmmss');
            var newFileName = dateTime + ".jpg";
            var newDirectory = "photos";

            window.requestFileSystem(LocalFileSystem.PERSISTENT, 0, function(fileSys) {

                    //The folder is created if doesn't exist
                    fileSys.root.getDirectory( newDirectory,
                        {create:true, exclusive: false},
                        function(directory) {

                            entry.moveTo(directory, newFileName, function (entry) {
                                //Now we can use "entry.toURL()" for the img src
                                console.log(entry.toURL());
                                deferred.resolve(entry);

                            }, resOnError);
                        },
                        resOnError);
                },
                resOnError);
        }, resOnError);

    return deferred.promise;
}

function resOnError(error) {
    console.log('Awwww shnap!: ' + error.code);
}

Answer 5

有3个步骤：

1. 获取照片。苹果有一个很好的例子on the iPhone dev site
2. 获取您的 Documents 目录，如下所示：

   
   NSArray *arrayPaths = NSSearchPathForDirectoriesInDomains(
               NSDocumentDirectory,
               NSUserDomainMask,
               YES);
   NSString *docDir = [arrayPaths objectAtIndex:0];
   

3. 最后，将您在步骤 1 中获得的 UIImage 存储到磁盘：

   
   NSString *filename = @"mypic.png";
   NSString *fullpath = [docDir stringByAppendingPathComponent:filename];
   [UIImagePNGRepresentation(image) writeToFile:fullpath atomically:YES];