[英]PhoneGap Camera , Cannot read property 'getPicture' of undefined
[英]DevExtreme/Phonegap camera plugin: “Cannot read propetry 'getPicture' of undefined”
我对我的应用程序感到疯狂。
我正在使用基于phonegap的DevExtreme。
我想用我的应用程序中的相机拍照,但遇到了一些麻烦。
首先,这里是我的config.xml。
<widget id="com.devexpress.apptemplate" version="1.0" versionCode="1">
<name>ApplicationTemplate</name>
<description>Template</description>
<preference name="permissions" value="none" />
<preference name="prerendered-icon" value="true" />
<preference name="android-windowSoftInputMode" value="adjustPan" />
<preference name="SplashScreenDelay" value="60000" />
<preference name="AutoHideSplashScreen" value="false" />
<preference name="SplashShowOnlyFirstTime" value="false" />
<preference name="FadeSplashScreen" value="false" />
<preference name="ShowSplashScreenSpinner" value="false" />
<preference name="DisallowOverscroll" value="true" />
<preference name="StatusBarOverlaysWebView" value="false" />
<preference name="StatusBarBackgroundColor" value="#000000" />
<preference name="android-minSdkVersion" value="14" />
<preference name="android-targetSdkVersion" value="22" />
<plugin name="cordova-plugin-camera" spec="^2.4.1" source="npm" />
<plugin name="cordova-plugin-splashscreen" onload="true" />
<plugin name="cordova-plugin-whitelist" />
<plugin name="cordova-plugin-ios-longpress-fix" />
<plugin name="cordova-plugin-statusbar" onload="true" />
<access origin="*" />
</widget>
您在这里看到任何问题吗?
此外,我还有一个按钮来调用相机功能(从教程复制):
// Called when a photo is successfully retrieved
//
function onPhotoDataSuccess(imageData) {
try
{
// Get image handle
//
var smallImage = document.getElementById('smallImage');
// Unhide image elements
//
smallImage.style.display = 'block';
// Show the captured photo
// The inline CSS rules are used to resize the image
//
smallImage.src = "data:image/jpeg;base64," + imageData;
}
catch (err) {
alert(err.message);
}
}
// Called when a photo is successfully retrieved
//
function onPhotoFileSuccess(imageData) {
// Get image handle
console.log(JSON.stringify(imageData));
// Get image handle
//
var smallImage = document.getElementById('smallImage');
// Unhide image elements
//
smallImage.style.display = 'block';
// Show the captured photo
// The inline CSS rules are used to resize the image
//
smallImage.src = 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 inline CSS rules are used to resize the image
//
largeImage.src = imageURI;
}
// A button will call this function
//
function capturePhotoWithData() {
try {
// Take picture using device camera and retrieve image as base64-encoded string
navigator.camera.getPicture(onPhotoDataSuccess, onFail, { quality: 50 });
}
catch (err) {
alert(err.message);
}
}
function capturePhotoWithFile() {
navigator.camera.getPicture(onPhotoFileSuccess, onFail, { quality: 50, destinationType: Camera.DestinationType.FILE_URI });
}
// A button will call this function
//
function getPhoto(source) {
debugger;
// Retrieve image file location from specified source
navigator.camera.getPicture(onPhotoURISuccess, onFail, {
quality: 50,
destinationType: OverviewAPP.destinationType.FILE_URI,
sourceType: source
});
}
// Called if something bad happens.
//
function onFail(message) {
alert('Failed because: ' + message);
}
这是我相关的HTML:
[...]
<div class="myBtnPhoto" data-bind="dxButton: { text: 'Conferma con foto', onClick: capturePhotoWithData}" style="float:right;"></div>
[...]
<img style="display:none;width:60px;height:60px;" id="smallImage" src="" />
<img style="display:none;" id="largeImage" src="" />
[...]
正确调用了函数capturePhotoWithData,但是该函数进入catch分支,并且警报显示“无法读取未定义的属性'getPicture'”
我创建模板,然后构建解决方案。 我正在Android设备上尝试此操作。 我在网络上阅读了很多论坛和其他问题,但是仍然没有任何效果。
您在这里看到任何错误或遗漏吗?
这意味着navigator.camera
未定义,因此您的项目看不到cordova-plugin-camera
。
最常见的问题可能是:您在设备准备就绪之前就调用它。 确保您将相机呼叫到设备deviceready
:
document.addEventListener("deviceready", function(){
console.log(navigator); // here you can check all plugins
}
您可以运行: $ cordova plugin list
,以确保此插件也存在于list中。
也尝试重建: $ cordova build android
(or ios)
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.