大家好，
我正在尝试在更改'src'属性后更新图像。我尝试用日期戳添加url，但这似乎不起作用。有人能告诉我出错的地方，或者只是建议一个更好的方法来一起完成这一切吗？
到目前为止，我已经包含了我的整个代码，因为我不确定问题出在哪里。我害怕，我有点像菜鸟。 “displayOut”函数中的前三行很可能是问题所在。提前感谢您的帮助。
var db = [{ // ROOMS
rooms: [{ // Room 0 - North room
description: "You awake to find yourself in a dank smelling old room, plaster and smashed glass litters the floor. To the North is a broken window, beyond which you can only see a thick grey mist. There is one door by which to exit, to the South.",
roomImg: "images/room_0.jpg",
exits: {
north: false,
south: 1,
east: false,
west: false,
up: false,
down: false
},
roomInvent: ["a Box of Matches", "a Glass Shard"]
}, { // Room 1 - Corridor
description: "You are in a short, dark corridor, a single tungsten bulb hangs stiffly from the ceiling. There is a light switch on the wall.",
roomImg: "images/room_1.jpg",
exits: {
north: 0,
south: 4,
east: 3,
west: false,
up: 5,
down: false
},
roomInvent: []
}, { // Room 2 - West Room - Locked room
description: "",
roomImg: "images/room_2.jpg",
exits: {
north: false,
south: false,
east: false,
west: false,
up: false,
down: false
},
roomInvent: []
}, { // Room 3 - East room - Bedroom
description: "You are in the Bedroom",
roomImg: "images/room_3.jpg",
exits: {
north: false,
south: false,
east: false,
west: 1,
up: false,
down: false
},
roomInvent: []
}, { // Room 4 - South room - kitchen
description: "You are in a small kitchen. There is an old log fire on the East wall, and a door leading outside to the South.",
roomImg: "images/room_4.jpg",
exits: {
north: 1,
south: false,
east: false,
west: false,
up: false,
down: false
},
roomInvent: []
}, { // Room 5 - Attic
description: "You are in the Attic.",
roomImg: "images/room_5.jpg",
exits: {
north: false,
south: false,
east: false,
west: false,
up: false,
down: 1
},
roomInvent: []
}]
}, // End Rooms
{ // ITEMS
items: [{
itemIndex: 0,
name: "a Box of Matches",
useWith: null,
examine: "There is only a single match inside."
}, {
itemIndex: 1,
name: "a Glass Shard",
useWith: null,
examine: "It looks sharp"
}, {
itemIndex: 2,
name: "a Mallet",
useWith: null,
examine: "It is old and rusty, but otherwise uninteresting."
}]
}
]; //End db
var inventory = [];
var inputTextBox = document.getElementById("inputTextBox");
var diologueBox = document.getElementById("diologueBox");
var strOut = "";
var roomLoc = 0;
function displayOut() {
// images
let dt = new Date;
document.getElementById("imgBox").setAttribute("src", db[0].rooms[roomLoc].roomImg + "?dt=" + dt.getTime());
// Diologue box
diologueBox.innerHTML = db[0].rooms[roomLoc].description +
(function() { // Check if room has items in inventory, if so, list them.
if (db[0].rooms[roomLoc].roomInvent != "") {
return "<br><br> The room contains " +
(function() {
let items = "";
for (let i = 0; i < db[0].rooms[roomLoc].roomInvent.length; i++) {
items += db[0].rooms[roomLoc].roomInvent[i] + ", ";
};
items = items.slice(0, items.length - 2);
return items;
})();
} else {
return "<br><br> The room is empty ";
};
})();
};
// Function for changing room location
function navigateTo(direction) {
if (db[0].rooms[roomLoc].exits[direction] === false) {
outputBox.innerHTML = "You cannot go " + direction + " from here."
} else {
roomLoc = db[0].rooms[roomLoc].exits[direction];
displayOut();
}
}
inputTextBox.addEventListener("keypress", function(event) {
let x = event.which || event.keyCode;
if (x === 13) { // 13 is the Return key
switch (inputTextBox.value.toLowerCase()) {
//Diologue Navigation
case "":
// Nothing happens
break;
case "north":
case "n":
navigateTo("north");
break;
case "south":
case "s":
navigateTo("south");
break;
case "east":
case "e":
navigateTo("east");
break;
case "west":
case "w":
navigateTo("west");
break;
case "up":
case "u":
navigateTo("up");
break;
case "down":
case "d":
navigateTo("down");
break;
//Dioogue Help
case "help":
outputBox.innerHTML = " Here is a list of useful commands: North, South, East, West, Up, Down, Look, Examine, Inventory, Take, Use";
break;
//
default:
outputBox.innerHTML = " I have no idea what " + "'" + inputTextBox.value.bold() + "'" + " means...";
} // End switch
//Clear InputTextBox
inputTextBox.value = "";
inputTextBox.setAttribute("placeholder", "");
} // End KeyPress
}); // End Event listener
displayOut();@charset "utf-8";
@font-face {
font-family: 'Terminal';
/*a name to be used later*/
src: url(lcd_solid.ttf);
/*URL to font*/
}
* {
font-family: Terminal;
font-size: 18px;
margin: 0;
border: 0;
}
body,
html {
font-family: helvetica;
font-size: 12px;
background: #282828;
}
#imgBox {
margin: 0px auto 0px auto;
background-image: url("../images/room_0.jpg");
background-repeat: no-repeat;
height: 600px;
width: 1024px;
}
#conBox {
margin: 0px auto 0px auto;
position: relative;
width: 1024px;
height: 300px;
}
#diologueBox {
background: #CCC;
height: 200px;
clear: both;
padding: 1px 0px 1px 3px;
overflow: none;
position: relative;
}
#diologueBox p {
margin: 5px;
left: 0px;
bottom: 0px;
}
#outputBox {
background: #CCC;
height: 50px;
clear: both;
padding: 1px 0px 1px 3px;
overflow: none;
position: relative;
}
#inputBox {
position: relative;
height: 20px;
background: #C1C1C1;
}
#inputTextBox {
height: 18px;
padding: 1px;
float: right;
width: 1004px;
background: #C1C1C1;
}
::-webkit-input-placeholder {
color: red;
}
:-moz-placeholder {
/* Firefox 18- */
color: red;
}
::-moz-placeholder {
/* Firefox 19+ */
color: red;
}
:-ms-input-placeholder {
color: red;
}
#inputTextBox.focus,
input:focus {
outline: none;
}
#bullet {
width: 15px;
float: left;
padding: 4px 0px 1px 3px;
}<!DOCTYPE html>
<html lang="en">
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
<link rel="stylesheet" type="text/css" href="styles/style.css">
<meta charset="utf-8">
<title>Untitled</title>
</head>
<body>
<div id="imgBox"></div>
<div id="conBox">
<div id="diologueBox"></div>
<div id="outputBox"></div>
<div id="inputBox">
<div id="bullet">></div>
<input id="inputTextBox" type="text" maxlength="60" placeholder="Type commands here, type 'Help' at any time for list of commands" autofocus></input>
</div>
</div>
<script src="script2.js"></script>
</body>
</html>
答案 0 :(得分：1)
快速解决方案：使用背景图像，就像在css中一样。
编辑：但是更改src属性应该可行，我不确定jquery如何处理它。
如果不能选择使用背景，您可以：
<img>并隐藏/显示它们（快速但需要预先加载所有内容）$("<img/>")动态创建img元素并替换旧元素。鉴于你的用例，它的资源非常便宜。