我有一个json文件,几乎每个对象的键都有一个空格,用于它们的名字和姓氏.因此,每当我尝试调用该键的值时,它都会显示为"未定义".如何显示要显示的值？
这是我的json文件的一个例子
{"Wojciech Szczesny":"yes","Lukasz Fabianski":"no","Emiliano Viviano":"no","Olivier Giroud":"yes","Per Mertesacker":"yes","Bacary Sagna":"yes","Laurent Koscielny":"no","Santi Cazorla":"yes","Mikel Arteta":"yes","Mesut \u00d6zil":"no","Kieran Gibbs":"yes","Aaron Ramsey":"no","Jack Wilshere":"no","Mathieu Flamini":"yes","Tomas Rosicky":"yes","Lukas Podolski":"yes","Nacho Monreal":"no","Theo Walcott":"no","Thomas Vermaelen":"yes","Carl Jenkinson":"no","Alex Oxlade-Chamberlain":"no","Serge Gnabry":"no","Kim Kallstrom":"no","Nicklas Bendtner":"no","Abou Diaby":"no","Park Chu-Young":"no","Emmanuel Frimpong":"no","Yaya Sanogo":"no","Ryo Miyaichi":"no","Hector Bellerin":"no","Chuba Akpom":"no","Isaac Hayden":"no","Gideon Zelalem":"no"}
这是我的代码
$.ajax({
url:'ars.json',
dataType:'json',
cache: false,
success: function(data) {
var count = 0;
arrayTesting.push(Object.getOwnPropertyNames(data[0]));
for(var key in data) {
//This line does not run at all
if(data[key].Per Mertesacker){
count++;
}else{}
}
//Nothing prints out in the console
console.log(data[key].Per Mertesacker);
}
});
如何在Webview上启用前置摄像头？我在AndroidManifest.xml中启用了这些功能
<uses-feature android:name="android.hardware.camera" android:required="true" />
<uses-feature android:name="android.hardware.camera.front" android:required="true" />
相机不会用于拍照或录制,只是打开前置摄像头.
当我使用手机浏览器访问网站时,手机摄像头工作一次允许提示信息.如何使用webview？
在html文件中有一个显示网络摄像头的Canvas和Video标签它不会记录或拍摄它只是显示摄像机视图.
这是html代码
<canvas id="inCanvas" width="500" height="500" style="display:none"></canvas>
<video id="inputVideo" width="100" height="100" autoplay loop ></video>
它适用于网络摄像头,但不适用于android中的webview.
使用带有以下代码的HTML5和Js在网站上打开网络摄像头.
<!DOCTYPE html>
<html>
<head>
<title></title>
<link rel="stylesheet" href="headBoxingStyle.css"/>
</head>
<body style="overflow: hidden">
<div id="headtrack"></div>
<canvas id='canvas' width='100' height='100'></canvas>
<video width="100" height="100"></video>
</body>
</html>
<script type="text/javascript">
var onFailSoHard = function(e)
{
console.log('failed',e);
}
window.URL = window.URL || window.webkitURL;
navigator.getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia;
var video = document.querySelector('video');
if(navigator.getUserMedia)
{
navigator.getUserMedia({video: true},function(stream) {
video.src = window.URL.createObjectURL(stream);
}, onFailSoHard);
}
document.getElementById('snapshot').onclick = function() {
var canvas = document.getElementById('canvas');
var ctx = canvas.getContext('2d');
ctx.drawImage(video,0,0);
}
</script>
但是如何通过Phonegap打开设备前置摄像头.不会拍摄照片或录像机,只显示前置摄像头视图.目前安装了Phonegap相机插件,添加了权限并测试了Phonegap上的示例代码,该代码工作正常,但上面的代码只显示了图片中的Play符号.
这是权限
<uses-permission android:name="android.permission.CAMERA" />
<uses-feature android:name="android.hardware.camera"android:required="false" …