单击从JS动态加载的框后复制到剪贴板
说明
我创建了一个页面，您可以在其中上传图像，然后在单击后返回图像特定部分的十六进制代码。
每次用户点击图片时，HEX代码都会显示在页面顶部的框中。
现在，我正在尝试制作显示HEX代码可点击的框。单击将复制剪贴板中的值（HEX代码）。
问题
副本有效但不适用于所有方框。如果我点击图像上的3个不同部分，我会得到3个带有HEX代码的盒子。如果我点击最后一个（红色），则副本不起作用。只有在我点击第一个框时才会触发它。
段
$(function() {
//Script that hides the input box (label is a substitute)
(function(e,t,n){var r=e.querySelectorAll("html")[0];r.className=r.className.replace(/(^|\s)no-js(\s|$)/,"$1js$2")})(document,window,0);
//Hex picker function
var $picked = $("#picked"); // Just to preview picked colors
var canvas = $('#canvas_picker')[0];
var context = canvas.getContext('2d');
$("#file_upload").change(function (e) {
var F = this.files[0];
var reader = new FileReader();
reader.onload = imageIsLoaded;
reader.readAsDataURL(F);
});
$('#fileLabel').bind({
dragover: function(e){
e.preventDefault();
e.stopPropagation();
},
dragleave: function(e){
e.preventDefault();
e.stopPropagation();
},
drop: function(e){
e.preventDefault();
e.stopPropagation();
var F = e.originalEvent.dataTransfer.files[0];
var reader = new FileReader();
reader.onload = imageIsLoaded;
reader.readAsDataURL(F);
}
});
function imageIsLoaded(e) {
var img = new Image();
img.onload = function(){
canvas.width = this.width;
canvas.height = this.height;
context.drawImage(this, 0, 0);
};
img.src = e.target.result;
}
$('#canvas_picker').click(function(event){
var x = event.pageX - $(this).offset().left;
var y = event.pageY - $(this).offset().top;
var img_data = context.getImageData(x,y , 1, 1).data;
var R = img_data[0];
var G = img_data[1];
var B = img_data[2];
var rgb = R + ',' + G + ',' + B ;
var hex = rgbToHex(R,G,B);
$('#rgb input').val( rgb );
$('#hex input').val('#' + hex);
$picked.append("<span class='span-value-copy' contenteditable='true' style='background:#"+hex+"'>#"+hex+"</span>");
function copyTextToClipboard(text) {
var textArea = document.createElement("textarea");
textArea.value = text;
document.body.appendChild(textArea);
textArea.select();
document.execCommand('copy');
document.body.removeChild(textArea);
}
var copyBobBtn = document.querySelector('.span-value-copy');
copyBobBtn.addEventListener('click', function(event) {
copyTextToClipboard(hex);
});
});
function rgbToHex(R, G, B) {
return toHex(R) + toHex(G) + toHex(B);
}
function toHex(n) {
n = parseInt(n, 10);
if (isNaN(n)) return "00";
n = Math.max(0, Math.min(n, 255));
return "0123456789ABCDEF".charAt((n - n % 16) / 16) + "0123456789ABCDEF".charAt(n % 16);
}
});/* latin-ext */
@font-face {
font-family: 'Lato';
font-style: normal;
font-weight: 300;
src: local('Lato Light'), local('Lato-Light'), url(http://fonts.gstatic.com/s/lato/v11/dPJ5r9gl3kK6ijoeP1IRsvY6323mHUZFJMgTvxaG2iE.woff2) format('woff2');
unicode-range: U+0100-024F, U+1E00-1EFF, U+20A0-20AB, U+20AD-20CF, U+2C60-2C7F, U+A720-A7FF;
}
/* latin */
@font-face {
font-family: 'Lato';
font-style: normal;
font-weight: 300;
src: local('Lato Light'), local('Lato-Light'), url(http://fonts.gstatic.com/s/lato/v11/EsvMC5un3kjyUhB9ZEPPwg.woff2) format('woff2');
unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2212, U+2215, U+E0FF, U+EFFD, U+F000;
}
body {
background: hsl(184,65%,49%);
font-family: 'Lato';
color: #000;
font: 15px/1.4em;
}
canvas{
background: hsl(184,65%,49%);
}
#picked span{
display:inline-block;
width:50px;
height:50px;
margin:3px;
text-align:center;
text-shadow:1px 1px 1px #000;
font:8px/50px Arial;
color:#fff;
}
.js .inputfile {
width: 0.1px;
height: 0.1px;
opacity: 0;
overflow: hidden;
position: absolute;
z-index: -1;
}
.inputfile + label {
max-width: 80%;
font-weight: 700;
text-overflow: ellipsis;
white-space: nowrap;
cursor: pointer;
display: inline-block;
overflow: hidden;
padding: 0.625rem 1.25rem;
}
.no-js .inputfile + label {
display: none;
}
.inputfile:focus + label,
.inputfile.has-focus + label {
outline: 1px dotted #000;
outline: -webkit-focus-ring-color auto 5px;
}
.inputfile + label svg {
width: 1em;
height: 1em;
vertical-align: middle;
fill: currentColor;
margin-top: -0.25em;
margin-right: 0.25em;
}
.inputfile-2 + label {
width: 90%;
max-width: 220px;
background: #fff;
color: #333;
border: none;
font-family: Lato;
text-align: center;
font-size: 1vw;
padding: 25px 0 25px 0;
display: inline-block;
letter-spacing: 1px;
font-weight: 700;
outline: none;
position: relative;
-webkit-transition: all 0.3s;
-moz-transition: all 0.3s;
transition: all 0.3s;
border: 3px solid #333;
}
/* COLUMN SETUP */
.col2 {
display: block;
float:left;
margin: 0;
}
.col2:first-child { margin-left: 0; }
/* GROUPING */
.group2:before,
.group2:after { content:""; display:table; }
.group2:after { clear:both;}
.group2 { zoom:1; /* For IE 6/7 */ }
/* GRID OF THREE */
.span_3_of_3 { width: 100%; }
.span_2_of_3 { width: 66.66%; }
.span_1_of_3 { width: 33.33%; }
/* GO FULL WIDTH BELOW 480 PIXELS */
@media only screen and (max-width: 480px) {
.col2 { margin: 0 }
.span_3_of_3, .span_2_of_3, .span_1_of_3 { width: 100%; }
}
/* COLUMN SETUP */
.col {
display: block;
float:left;
margin: 1% 0 1% 2%;
}
.col:first-child { margin-left: 0; }
/* GROUPING */
.group:before,
.group:after { content:""; display:table; }
.group:after { clear:both;}
.group { zoom:1; /* For IE 6/7 */ }
/* GRID OF FOUR */
.span_4_of_4 {
width: 100%;
}
.span_3_of_4 {
width: 74.5%;
}
.span_2_of_4 {
width: 49%;
}
.span_1_of_4 {
width: 23.5%;
}
/* GO FULL WIDTH BELOW 480 PIXELS */
@media only screen and (max-width: 480px) {
.col { margin: 1% 0 1% 0%; }
.span_1_of_4, .span_2_of_4, .span_3_of_4, .span_4_of_4 { width: 100%; }
}
/* SECTIONS */
.section {
margin-left:5%;
margin-right:5%;
clear: both;
}
/* COLUMN SETUP */
.col {
display: block;
float:left;
margin: 1% 0 1% 2%;
}
.col:first-child { margin-left: 0; }
/* GROUPING */
.group:before,
.group:after { content:""; display:table; }
.group:after { clear:both;}
.group { zoom:1; /* For IE 6/7 */ }
/* GRID OF FOUR */
.span_4_of_4 {
width: 100%;
}
.span_3_of_4 {
width: 74.5%;
}
.span_2_of_4 {
width: 49%;
}
.span_1_of_4 {
width: 23.5%;
}
/* GO FULL WIDTH BELOW 480 PIXELS */
@media only screen and (max-width: 480px) {
.col { margin: 1% 0 1% 0%; }
.span_1_of_4, .span_2_of_4, .span_3_of_4, .span_4_of_4 { width: 100%; }
}<html lang="en" class="no-js">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="picked"></div>
<div class="section group">
<div class="col span_1_of_4">
<input type="file" name="file_upload[]" id="file_upload" class="inputfile inputfile-2" data-multiple-caption="{count} files selected" multiple /><label id="fileLabel" for="file_upload"><svg xmlns="http://www.w3.org/2000/svg" width="20" height="17" viewBox="0 0 20 17"><path d="M10 0l-5.2 4.9h3.3v5.1h3.8v-5.1h3.3l-5.2-4.9zm9.3 11.5l-3.2-2.1h-2l3.4 2.6h-3.5c-.1 0-.2.1-.2.1l-.8 2.3h-6l-.8-2.2c-.1-.1-.1-.2-.2-.2h-3.6l3.4-2.6h-2l-3.2 2.1c-.4.3-.7 1-.6 1.5l.6 3.1c.1.5.7.9 1.2.9h16.3c.6 0 1.1-.4 1.3-.9l.6-3.1c.1-.5-.2-1.2-.7-1.5z"/></svg><span>CHOOSE A FILE</span></label>
</div>
<div class="col span_3_of_4">
<canvas width="600" height="300" id="canvas_picker"></canvas>
</div>
</div>
</html>
用户Harshil Patel给出了一个无效的答案。我稍微调整了一下代码并使其正常工作。因此，学分也会分发给这个用户：P正确的JS查询如下所示：
$(function() {
//Script that hides the input box (label is a substitute)
(function(e,t,n){var r=e.querySelectorAll("html")[0];r.className=r.className.replace(/(^|\s)no-js(\s|$)/,"$1js$2")})(document,window,0);
//Hex picker function
var $picked = $("#picked"); // Just to preview picked colors
var canvas = $('#canvas_picker')[0];
var context = canvas.getContext('2d');
$("#file_upload").change(function (e) {
var F = this.files[0];
var reader = new FileReader();
reader.onload = imageIsLoaded;
reader.readAsDataURL(F);
});
$('#fileLabel').bind({
dragover: function(e){
e.preventDefault();
e.stopPropagation();
},
dragleave: function(e){
e.preventDefault();
e.stopPropagation();
},
drop: function(e){
e.preventDefault();
e.stopPropagation();
var F = e.originalEvent.dataTransfer.files[0];
var reader = new FileReader();
reader.onload = imageIsLoaded;
reader.readAsDataURL(F);
}
});
function imageIsLoaded(e) {
var img = new Image();
img.onload = function(){
canvas.width = this.width;
canvas.height = this.height;
context.drawImage(this, 0, 0);
};
img.src = e.target.result;
}
function rgbToHex(R, G, B) {
return toHex(R) + toHex(G) + toHex(B);
}
function toHex(n) {
n = parseInt(n, 10);
if (isNaN(n)) return "00";
n = Math.max(0, Math.min(n, 255));
return "0123456789ABCDEF".charAt((n - n % 16) / 16) + "0123456789ABCDEF".charAt(n % 16);
}
$('#canvas_picker').click(function(event){
var x = event.pageX - $(this).offset().left;
var y = event.pageY - $(this).offset().top;
var img_data = context.getImageData(x,y , 1, 1).data;
var R = img_data[0];
var G = img_data[1];
var B = img_data[2];
var rgb = R + ',' + G + ',' + B ;
var hex = rgbToHex(R,G,B);
$('#rgb input').val( rgb );
$('#hex input').val('#' + hex);
$picked.append("<span data-value='#"+hex+"' class='span-value-copy-"+hex+"' contenteditable='true' style='background:#"+hex+"'>#"+hex+"</span>");
function copyTextToClipboard(text) {
var textArea = document.createElement("textarea");
textArea.value = text;
document.body.appendChild(textArea);
textArea.select();
document.execCommand('copy');
document.body.removeChild(textArea);
}
var copyBobBtn = document.querySelector(".span-value-copy-"+hex);
copyBobBtn.addEventListener('click', function() {
var currentHex = $(this).data('value');
copyTextToClipboard(currentHex);
});
});
});
1 个答案:
答案 0 :(得分：1)
Left(UPPER(REPLACE(CONVERT(NVARCHAR, DECRYPTBYKEY(postal_code)), '-', ' ')),
3)+' '+ Right(UPPER(CONVERT(NVARCHAR, DECRYPTBYKEY(postal_code))), 3) as [Postal Code],
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