如何使用Ionic和Cordova從設備庫中加載圖像？

Question

我有一個使用Cordova的Ionic應用程序，想從設備相冊中加載圖像。 我的問題是，盡管我確實按照了Cordova網站上的說明進行操作，但仍無法正常工作。 這是我的代碼：

index.html

<html>
    <head>
        <meta charset="utf-8">
        <meta name="viewport" content="initial-scale=1, maximum-scale=1, user-scalable=no, width=device-width">
        <title>Ionic App</title>
        <link href="ionic/css/ionic.css" rel="stylesheet">
        <link href="css/slider-style.css" rel="stylesheet" type="text/css"/>
        <link href="css/main-app.css" rel="stylesheet" type="text/css"/>

        <script src="ionic/js/angular/angular.js" type="text/javascript"></script>
        <script src="ionic/js/angular/angular-animate.js" type="text/javascript"></script>
        <script src="ionic/js/ionic.bundle.js"></script>
        <script src="ionic/js/app.js"></script>
        <script src="js/myapp.js" type="text/javascript"></script>
        <script src="js/LoadFromDevice.js" type="text/javascript"></script>

    </head>

    <body ng-app="ionicApp" animation="slide-left-right-ios7" ng-controller="PopupCtrl">

    <ion-nav-bar class="nav-title-slide-ios7 bar-light transparent-nav" style="background: none; border-bottom: none">
        <!--        <ion-nav-back-button class="button-icon ion-chevron-left">
                </ion-nav-back-button>-->

    </ion-nav-bar>

    <ion-nav-view>

    </ion-nav-view>

</body>
</html>

loadImage.html

<button onclick="capturePhoto();">Capture Photo</button> <br>
<button onclick="capturePhotoEdit();">Capture Editable Photo</button> <br>
<button onclick="getPhoto(pictureSource.PHOTOLIBRARY);">From Photo Library</button><br>
<button onclick="getPhoto(pictureSource.SAVEDPHOTOALBUM);">From Photo Album</button><br>
<img style="display:none;width:60px;height:60px;" id="smallImage" src="" />
<img style="display:none;" id="largeImage" src="" />
<script>


    var pictureSource;   // picture source
    var destinationType; // sets the format of returned value

    // Wait for device API libraries to load
    //
    document.addEventListener("deviceready",onDeviceReady,false);

    // device APIs are available
    //
    function onDeviceReady() {
        pictureSource=navigator.camera.PictureSourceType;
        destinationType=navigator.camera.DestinationType;
    }

    // Called when a photo is successfully retrieved
    //
    function onPhotoDataSuccess(imageData) {
      // Uncomment to view the base64-encoded image data
      // console.log(imageData);

      // Get image handle
      //
      var smallImage = document.getElementById('smallImage');

      // Unhide image elements
      //
      smallImage.style.display = 'block';

      // Show the captured photo
      // The in-line CSS rules are used to resize the image
      //
      smallImage.src = "data:image/jpeg;base64," + imageData;
    }

    // Called when a photo is successfully retrieved
    //
    function onPhotoURISuccess(imageURI) {
      // Uncomment to view the image file URI
      // console.log(imageURI);

      // Get image handle
      //
      var largeImage = document.getElementById('largeImage');

      // Unhide image elements
      //
      largeImage.style.display = 'block';

      // Show the captured photo
      // The in-line CSS rules are used to resize the image
      //
      largeImage.src = imageURI;
    }

    // A button will call this function
    //
    function capturePhoto() {
      // Take picture using device camera and retrieve image as base64-encoded string
      navigator.camera.getPicture(onPhotoDataSuccess, onFail, { quality: 50,
        destinationType: destinationType.DATA_URL });
    }

    // A button will call this function
    //
    function capturePhotoEdit() {
      // Take picture using device camera, allow edit, and retrieve image as base64-encoded string
      navigator.camera.getPicture(onPhotoDataSuccess, onFail, { quality: 20, allowEdit: true,
        destinationType: destinationType.DATA_URL });
    }

    // A button will call this function
    //
    function getPhoto(source) {
      // Retrieve image file location from specified source
      navigator.camera.getPicture(onPhotoURISuccess, onFail, { quality: 50,
        destinationType: destinationType.FILE_URI,
        sourceType: source });
    }

    // Called if something bad happens.
    //
    function onFail(message) {
      alert('Failed because: ' + message);
    }


</script>

我正在使用cordova-plugin-camera實現此目的。

Answer 1

您能否詳細說明“只是不起作用”。 該過程中哪一步停止工作？ 一種。 找不到文件夾？ b。 無法從文件夾中選擇照片？ C。 可以選擇照片但URI不可用？ d。 可用的URI無法正確呈現？

我們可能會根據您對以上內容的回答以及您所使用的設備，操作系統版本，cordova版本和ionic版本的詳細信息為您提供幫助。

您需要處理很多變體和問題，才能在各種設備上進行這項工作。 有一些商業插件可以很好地做到這一點，例如https://www.onymos.com/products/media

如何使用Ionic和Cordova從設備庫中加載圖像？

問題描述

1 個解決方案

解決方案1
0 2016-04-22 22:53:10

如何使用Ionic和Cordova從設備庫中加載圖像？

問題描述

1 個解決方案

解決方案1 0 2016-04-22 22:53:10

解決方案1
0 2016-04-22 22:53:10