我对 Javascript 还很陌生,正在尝试构建一个简单的照片查看器、幻灯片应用程序。我可能在代码中存在我还不知道的错误/错误做法。幻灯片按钮上的事件触发,我可以在控制台中看到输出,但是随机幻灯片按钮上的事件不会触发。
HTML5 片段
<form>
<div id="controls">
<input type="button" id="slideshow" value="Slide Show" />
<input type="button" id="randomSlideshow" value="Random Slide Show" />
</div>
</form>
<script src="js/PhotoViewer.js"></script>
</body>
JS 片段
var photosArrayGlobal = new Array();
var photoIndexGlobal = 0;
var displayGlobal;
window.onload = main;
function main() {
"use strict";
document.getElementById("slideshow").onclick = getArrayPhotosNames;
document.getElementById("randomSlideshow").onclick = randomize(photosArrayGlobal);
displayGlobal = document.getElementById("myImage");
document.getElementById("nextSlide").onclick = function () {
displayGlobal.setAttribute("src", photosArrayGlobal[1]); //Test value, image 2
};
}
function getArrayPhotosNames() {
var folderName = document.getElementById("photoFolder").value;
var commonName = document.getElementById("commonName").value;
var startNum = document.getElementById("startNum").value;
var endNum = document.getElementById("endNum").value;
var j = 0;
if (startNum > endNum) {
alert("Invalid Numbers");
}
var nameArray = new Array();
for (var i = startNum; i <= endNum; i++) {
nameArray[j] = folderName + commonName + i + ".jpg";
j++;
}
photosArrayGlobal = nameArray.slice();
console.log(photosArrayGlobal);
return nameArray;
}
function randomize(dataArray) {
var i = dataArray.length;
var j, tempi, tempj;
if (i === 0) {
return false;
}
while (--i) {
j = Math.floor(Math.random() * (i + 1));
tempi = dataArray[i];
tempj = dataArray[j];
dataArray[i] = tempj;
dataArray[j] = tempi;
}
console.log(dataArray);
}