我试图能够根据鼠标位置的接近程度更改文本字符串中单个字符的css属性。
Codepen：https://codepen.io/NewbCake/pen/qYXvoo
我们的想法是获取一串文本并将每个字符包装在一个带有“single-char”整体类和唯一类的span中。
原始文本字符串是这样的：
<p class='sample-text hover-letter'>This sample text turns red, character by character, when you hover over it with your mouse.</p>
然后将它分成如下个别字符：
<span class=“single-char char-0”> T</span>
<span class=“single-char char-1”> h</span>
<span class=“single-char char-2”> i</span>
<span class=“single-char char-3”> s</span>
JS
function arrayMe(string) {
// For all matching elements
$(string).each(function() {
// Get contents of string
var myStr = $(this).html();
// Split myStr into an array of characters
myStr = myStr.split("");
// Build an html string of characters wrapped in tags with classes
var myContents = "";
for (var i = 0, len = myStr.length; i < len; i++) {
myContents += '<span class="single-char char-' + i + '">' + myStr[i] + '</span>';
}
// Replace original string with constructed html string
$(this).html(myContents);
console.log(i)
});
(function() {
var mX, mY, distance,
$distanceSpan_red = $('#distance_blue span'),
$distanceSpan_blue = $('#distance_red span'),
$element0 = $('.char-0'),
$element1 = $('.char-1');
$element2 = $('.char-2');
$element3 = $('.char-3');
$element4 = $('.char-4');
function calculateDistance(elem, mouseX, mouseY) {
return Math.floor(Math.sqrt(Math.pow(mouseX - (elem.offset().left + (elem.width() / 2)), 2) + Math.pow(mouseY - (elem.offset().top + (elem.height() / 2)), 2)));
}
$(document).mousemove(function(e) {
mX = e.pageX;
mY = e.pageY;
distance0 = calculateDistance($element0, mX, mY);
distance1 = calculateDistance($element1, mX, mY);
distance2 = calculateDistance($element2, mX, mY);
distance3 = calculateDistance($element3, mX, mY);
distance4 = calculateDistance($element4, mX, mY);
$element0.css({'font-size': distance0 + 'px'});
$element1.css({'font-size': distance1 + 'px'});
$element2.css({'font-size': distance2 + 'px'});
$element3.css({'font-size': distance3 + 'px'});
$element4.css({'font-size': distance4 + 'px'});
});
})();
}
// Calling arrayMe on page load, on class "sample-text"
$('document').ready(function() {
var myStringType = $('.sample-text');
arrayMe(myStringType);
});
我正在努力解决的问题是如何使代码灵活且动态地工作。无论文本量多少，它都应该能够测量从鼠标位置到每个字母的唯一类的距离，然后将其存储为距离值，然后将该距离值映射到css属性值。
任何帮助将不胜感激！
答案 0 :(得分：1)
我重构您的代码以制作一个有效的示例。
你需要根据你的班级single-char创建一个数组，这样你就可以循环它并且不需要硬编码字符数量。
我评论你calculateDistance()返回，因为数学有点时髦。
但是通过这个例子，你可以看到所有角色是如何受到影响的
$(document).mousemove(function(e) {
var mX = e.pageX;
var mY = e.pageY;
$('.single-char').each(function(){
$(this).css({'font-size': calculateDistance(this, mX, mY) + 'px'});
});
});
您可以使用$('common-class')定位所有字符，然后使用.each()进行循环。
希望这会有所帮助：）
function arrayMe(string){
$(string).each(function() {
var myStr = $(this).html();
myStr = myStr.split("");
var myContents = "";
for (var i = 0, len = myStr.length; i < len; i++) {
myContents += '<span class="single-char char-' + i + '">' + myStr[i] + '</span>';
}
$(this).html(myContents);
console.log(i);
});
}
function calculateDistance(elem, mouseX, mouseY) {
// return Math.floor(Math.sqrt(Math.pow(mouseX - ($(elem).offset().left + ($(elem).width() / 2)), 2) + Math.pow(mouseY - ($(elem).offset().top + ($(elem).height() / 2)), 2)));
return mouseX;
}
$(document).mousemove(function(e) {
var mX = e.pageX;
var mY = e.pageY;
$('.single-char').each(function(){
$(this).css({'font-size': calculateDistance(this, mX, mY) + 'px'});
});
});
$('document').ready(function() {
var myStringType = $('.sample-text');
arrayMe(myStringType);
});.single-char:hover {
color:red;
cursor:pointer;
}<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<p class='sample-text hover-letter'>This sample text turns red, character by character, when you hover over it with your mouse.</p>
在添加后续评论后，已添加此代码以帮助OP。
function arrayMe(string){
$(string).each(function() {
var myStr = $(this).html();
myStr = myStr.split("");
var myContents = "";
for (var i = 0, len = myStr.length; i < len; i++) {
myContents += '<span class="single-char char-' + i + '">' + myStr[i] + '</span>';
}
$(this).html(myContents);
console.log(i);
});
}
function calculateDistance(elem, mouseX, mouseY) {
// return Math.floor(Math.sqrt(Math.pow(mouseX - ($(elem).offset().left + ($(elem).width() / 2)), 2) + Math.pow(mouseY - ($(elem).offset().top + ($(elem).height() / 2)), 2)));
return mouseX;
}
$('document').ready(function() {
var myStringType = $('.sample-text');
arrayMe(myStringType);
$('.single-char').hover(function(e) {
var charNumber = $(this).attr('class').split('-')[2];
$('.single-char').each(function(){
$(this).css({'font-size': 12 + 'px'});
});
$(this).css({'font-size': 36 + 'px'});
});
});.single-char:hover {
color:red;
cursor:pointer;
}<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<p class='sample-text hover-letter'>This sample text turns red, character by character, when you hover over it with your mouse.</p>
这是第二个跟进片段，旨在说明数学的嗜好。
function arrayMe(string){
$(string).each(function() {
var myStr = $(this).html();
myStr = myStr.split("");
var myContents = "";
for (var i = 0, len = myStr.length; i < len; i++) {
myContents += '<span class="single-char char-' + i + '">' + myStr[i] + '</span>';
}
$(this).html(myContents);
console.log(i);
});
}
function calculateDistance(elem, mouseX, mouseY) {
return Math.floor(Math.sqrt(Math.pow(mouseX - ($(elem).offset().left + ($(elem).width() / 2)), 2) + Math.pow(mouseY - ($(elem).offset().top + ($(elem).height() / 2)), 2)));
}
$('document').ready(function() {
var myStringType = $('.sample-text');
arrayMe(myStringType);
$('.single-char').hover(function(e) {
var mX = e.pageX;
var mY = e.pageY;
var charNumber = $(this).attr('class').split('-')[2];
$('.single-char').each(function(){
$(this).css({'font-size': calculateDistance($(this), mX, mY) + 'px'});
});
});
});.single-char:hover {
color:red;
cursor:pointer;
}<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<p class='sample-text hover-letter'>This sample text turns red, character by character, when you hover over it with your mouse.</p>