【发布时间】：2019-11-30 01:06:38
【问题描述】：
我正在尝试创建类似于 pintrest 的照片视图显示，但有一个首选项 checkbox，您可以在其中选择您看到的图像类型。
我遇到的问题是其中一些图像属于多个类别，例如，城市中可能有驾驶镜头，所以我希望该特定图像显示城市 checkbox 或驾驶图像checkbox 被点击。
目前我有这样的说法，例如，城市checkbox 被点击并变成unchecked，然后所有带有城市class 的图像都会得到一个displayNone 的类，这很明显。但我想这样做，如果它还有另一个class，目前是checked，那么它不会得到displayNone的class，只有当那个特定图像的所有类都是unchecked时，那个图像才会得到displayNone 的class。
我知道 switch 语句非常适合这种情况，但我似乎无法确切地弄清楚我将如何实现它。
HTML
<!--PREFERENCE CHECKBOX-->
<div class = "preferanceCheckbox">
<form class ="formBox">
<div>
<input type="checkbox" class = "cBDrivingShot">
Driving Shots <br>
</div>
<input type="checkbox" class = "cBCyberPunkShot">
Cyberpunk <br>
<input type="checkbox" class = "cBcityRelated">
city related <br>
</form>
</div>
<div class ="photoSectionAlignment pintrestView imgZ displayNone">
<!-- CYBERPUNK SHOTS -->
<img src="cyberPunkOne.jpg" class = "pImgCyberPunk pImgDrivingShot displayNone">
<img src="cyberPunkTwo.jpg" class = "pImgCyberPunk pImgCity displayNone">
<img src="cyberPunkTwo.jpg" class = "pImgCyberPunk pImgtext displayNone">
<!-- DRIVING SHOTS -->
<img src="drivingShotOne" class = "pImgDrivingShot pImgCity displayNone">
<img src="drivingShotTwo" class = "pImgDrivingShot pImgCity displayNone">
<img src="drivingShotThree" class = "pImgDrivingShot pImgCyberPunk displayNone">
<!-- CITY SHOTS -->
<img src="cityShotOne" class = "pImg pImgCity displayNone">
</div>
CSS
img {
width: 200px;
}
.displayNone {
display: none;
}
JAVASCRIPT
//GLOBAL VARIABLES
//....................................................................
var pintrestView = document.querySelector(".pintrestView");
var dnPintrest = pintrestView.classList.contains("displayNone");
// GLOBAL PREFERANCES CODE
//..................................................................
var drivingCheckBox = document.querySelector(".cBDrivingShot");
var cyberPunkCheckBox = document.querySelector(".cBCyberPunkShot");
var cityCheckBox = document.querySelector(".cBcityRelated");
//PREFERANCES CODE
//..................................................................
// pintrest class variables
var pImgDrivingShot = document.querySelectorAll(".pImgDrivingShot");
var pImgCyberPunk = document.querySelectorAll(".pImgCyberPunk");
var pImgCity = document.querySelectorAll(".pImgCity");
//DRIVING SHOT FUNCTIONALITY
drivingCheckBox.addEventListener("click",drivingShotImgFunctionPintrest);
function drivingShotImgFunctionPintrest(){
if (drivingCheckBox.checked === true){
for (var i = 0; i < pImgDrivingShot.length; i++){
if (pImgDrivingShot[i].classList.contains("displayNone")) {
pImgDrivingShot[i].classList.remove("displayNone");
}
}
}else{
if (drivingCheckBox.checked === false) {
for (var i = 0; i < pImgDrivingShot.length; i++){
if (pImgDrivingShot[i].classList.contains("displayNone") === false) {
pImgDrivingShot[i].classList.add("displayNone");
}
}
}
}
}
//CYBERPUNK FUNCTIONALITY
cyberPunkCheckBox.addEventListener("click",cyberPunkImgFunctionPintrest);
function cyberPunkImgFunctionPintrest(){
if (cyberPunkCheckBox.checked === true){
for (var i = 0; i < pImgCyberPunk.length; i++){
if (pImgCyberPunk[i].classList.contains("displayNone")) {
pImgCyberPunk[i].classList.remove("displayNone");
}
}
}else{
if (cyberPunkCheckBox.checked === false) {
for (var i = 0; i < pImgCyberPunk.length; i++){
if (pImgCyberPunk[i].classList.contains("displayNone") === false) {
pImgCyberPunk[i].classList.add("displayNone");
}
}
}
}
}
//CITY FUNCTIONALITY
cityCheckBox.addEventListener("click",cityImgFunctionPintrest);
function cityImgFunctionPintrest(){
if (cityCheckBox.checked === true){
for (var i = 0; i < pImgCity.length; i++){
if (pImgCity[i].classList.contains("displayNone")) {
pImgCity[i].classList.remove("displayNone");
}
}
}else{
if (cityCheckBox.checked === false) {
for (var i = 0; i < pImgCity.length; i++){
if (pImgCity[i].classList.contains("displayNone") === false) {
pImgCity[i].classList.add("displayNone");
}
}
}
}
}
【问题讨论】：
标签： javascript loops class switch-statement