我正在从中获取图像及其位置 [左（x）和顶部（y）] json在以下代码的帮助下并显示在html页面中。...如果json中有单个图像，则效果不佳....
var mask1;
$(document).ready(function()
{
var maskedImageUrla = "";
var coordinates = {
x: 0,
y: 0
};
var width = 0;
var height = 0;
$.getJSON('2images.json', function(json)
{
for (let layer of json.layers)
{
width = layer.width;
height = layer.height;
if (layer.layers && layer.layers.length > 0)
{
for (let temp of layer.layers)
{
if (temp.src) maskedImageUrla = temp.src;
else if (temp.layers)
{
for (let tl of temp.layers)
if (tl.src)
{
maskedImageUrla = 'http://piccellsapp.com:1337/parse/files/PfAppId/' + tl.src;
coordinates.x = temp.x;
coordinates.y = temp.y;
}
}
}
}
}
$(".container").css('width', width + "px").css('height', height + "px").addClass('temp');
var mask1 = $(".container").mask({
maskImageUrl: maskedImageUrla, // get image
onMaskImageCreate: function(img) {
img.css({
"position": "fixed",
"left": coordinates.x + "px", // get x
"top": coordinates.y + "px" // get y
});
}
});
fileupa1.onchange = function() {
mask1.loadImage(URL.createObjectURL(fileupa1.files[0]));
};
});
}); // end of document ready
要求：
但是如果json中有多张图片，则只获取一张图片，但是如何获取所有图片[src]及其位置[x＆y] ....
Codepen [2个图像json]：https://codepen.io/kidsdial/pen/RdwXpZ
编辑：以下是代码段：
var mask1;
$(document).ready(function()
{
var maskedImageUrla = "";
var coordinates = {
x: 0,
y: 0
};
var width = 0;
var height = 0;
var json = {
"name": "newyear collage",
"layers": [
{
"x": 0,
"height": 612,
"layers": [
{
"x": 0,
"y": 0
},
{
"x": 160,
"layers": [
{
"x": 0,
"src": "AX7HBOE.png",
"y": 0,
"name": "mask_image_1"
},
{
"name": "useradd_ellipse1"
}
],
"y": 291,
"name": "user_image_1"
},
{
"x": 25,
"layers": [
{
"x": 0,
"src": "o5P9tdZ.png",
"y": 0,
"name": "mask_image_2"
},
{
"name": "useradd_ellipse_2"
}
],
"y": 22,
"name": "user_image_2"
}
],
"y": 0,
"width": 612,
"name": "newyearcollage08"
}
]
};
for (let layer of json.layers)
{
width = layer.width;
height = layer.height;
if (layer.layers && layer.layers.length > 0)
{
for (let temp of layer.layers)
{
if (temp.src) maskedImageUrla = temp.src;
else if (temp.layers)
{
for (let tl of temp.layers)
if (tl.src)
{
maskedImageUrla = 'https://i.imgur.com/' + tl.src;
coordinates.x = temp.x;
coordinates.y = temp.y;
}
}
}
}
}
$(".container").css('width', width + "px").css('height', height + "px").addClass('temp');
var mask1 = $(".container").mask({
maskImageUrl: maskedImageUrla, // get image
onMaskImageCreate: function(img) {
img.css({
"position": "fixed",
"left": coordinates.x + "px", // get x
"top": coordinates.y + "px" // get y
});
}
});
fileupa1.onchange = function() {
mask1.loadImage(URL.createObjectURL(fileupa1.files[0]));
};
}); // end of document ready
// jq plugin for mask
(function($) {
var JQmasks = [];
$.fn.mask = function(options) {
// This is the easiest way to have default options.
var settings = $.extend({
// These are the defaults.
maskImageUrl: undefined,
imageUrl: undefined,
scale: 1,
id: new Date().getUTCMilliseconds().toString(),
x: 0, // image start position
y: 0, // image start position
onMaskImageCreate: function(div) {},
}, options);
var container = $(this);
let prevX = 0,
prevY = 0,
draggable = false,
img,
canvas,
context,
image,
timeout,
initImage = false,
startX = settings.x,
startY = settings.y,
div;
container.mousePosition = function(event) {
return {
x: event.pageX || event.offsetX,
y: event.pageY || event.offsetY
};
}
container.selected = function(ev) {
var pos = container.mousePosition(ev);
var item = $(".masked-img canvas").filter(function() {
var offset = $(this).offset()
var x = pos.x - offset.left;
var y = pos.y - offset.top;
var d = this.getContext('2d').getImageData(x, y, 1, 1).data;
return d[0] > 0
});
JQmasks.forEach(function(el) {
var id = item.length > 0 ? $(item).attr("id") : "";
if (el.id == id)
el.item.enable();
else el.item.disable();
});
};
container.enable = function() {
draggable = true;
$(canvas).attr("active", "true");
div.css({
"z-index": 2
});
}
container.disable = function() {
draggable = false;
$(canvas).attr("active", "false");
div.css({
"z-index": 1
});
}
container.onDragStart = function(evt) {
container.selected(evt);
prevX = evt.clientX;
prevY = evt.clientY;
};
container.getImagePosition = function() {
return {
x: settings.x,
y: settings.y,
scale: settings.scale
};
};
container.onDragOver = function(evt) {
if (draggable && $(canvas).attr("active") === "true") {
var x = settings.x + evt.clientX - prevX;
var y = settings.y + evt.clientY - prevY;
if (x == settings.x && y == settings.y)
return; // position has not changed
settings.x += evt.clientX - prevX;
settings.y += evt.clientY - prevY;
prevX = evt.clientX;
prevY = evt.clientY;
container.updateStyle();
}
};
container.updateStyle = function() {
clearTimeout(timeout);
timeout = setTimeout(function() {
context.clearRect(0, 0, canvas.width, canvas.height);
context.beginPath();
context.globalCompositeOperation = "source-over";
image = new Image();
image.setAttribute('crossOrigin', 'anonymous');
image.src = settings.maskImageUrl;
image.onload = function() {
canvas.width = image.width;
canvas.height = image.height;
context.drawImage(image, 0, 0, image.width, image.height);
div.css({
"width": image.width,
"height": image.height
});
};
img = new Image();
img.src = settings.imageUrl;
img.setAttribute('crossOrigin', 'anonymous');
img.onload = function() {
settings.x = settings.x == 0 && initImage ? (canvas.width - (img.width * settings.scale)) / 2 : settings.x;
settings.y = settings.y == 0 && initImage ? (canvas.height - (img.height * settings.scale)) / 2 : settings.y;
context.globalCompositeOperation = 'source-atop';
context.drawImage(img, settings.x, settings.y, img.width * settings.scale, img.height * settings.scale);
initImage = false;
};
}, 0);
};
// change the draggable image
container.loadImage = function(imageUrl) {
if (img)
img.remove();
// reset the code.
settings.y = startY;
settings.x = startX;
prevX = prevY = 0;
settings.imageUrl = imageUrl;
initImage = true;
container.updateStyle();
};
// change the masked Image
container.loadMaskImage = function(imageUrl, from) {
if (div)
div.remove();
canvas = document.createElement("canvas");
context = canvas.getContext('2d');
canvas.setAttribute("draggable", "true");
canvas.setAttribute("id", settings.id);
settings.maskImageUrl = imageUrl;
div = $("<div/>", {
"class": "masked-img"
}).append(canvas);
div.find("canvas").on('touchstart mousedown', function(event) {
if (event.handled === false) return;
event.handled = true;
container.onDragStart(event);
});
div.find("canvas").on('touchend mouseup', function(event) {
if (event.handled === false) return;
event.handled = true;
container.selected(event);
});
div.find("canvas").bind("dragover", container.onDragOver);
container.append(div);
if (settings.onMaskImageCreate)
settings.onMaskImageCreate(div);
container.loadImage(settings.imageUrl);
};
container.loadMaskImage(settings.maskImageUrl);
JQmasks.push({
item: container,
id: settings.id
})
return container;
};
}(jQuery));.temp
{
border: 1px solid #DDDDDD;
display: flex;
background :silver;
}
.container canvas {
display: block;
}
.masked-img {
overflow: hidden;
margin-top: 50px;
position: relative;
}<head>
<script src="https://code.jquery.com/jquery-3.3.1.min.js"></script>
image 1
<input id="fileupa1" type="file" >
<div class="container">
</div>
</head>
答案 0 :(得分：1)
json部分正常。但是之后
var mask1 = $(".container").mask({
maskImageUrl: maskedImageUrla, // get image
您仅创建一个图像，最后一个值为maskedImageUrla。
您可以做的就是将图像存储在数组中并对其进行迭代，如下所示：
$.getJSON('2images.json', function(json)
{
const images = [];
for (let layer of json.layers)
...
for (let tl of temp.layers)
if (tl.src) {
images.push({
maskedImageUrla = 'http://piccellsapp.com:1337/parse/files/PfAppId/' + tl.src,
coordinates.x = temp.x,
coordinates.y = temp.y
})
}
...
images.forEach(image => {
var mask1 = $(".container").mask({
maskImageUrl: image.maskedImageUrla, // get image
onMaskImageCreate: function(img) {
img.css({
"position": "fixed",
"left": image.coordinates.x + "px", // get x
"top": image.coordinates.y + "px" // get y
});
}
});
fileupa1.onchange = function() {
mask1.loadImage(URL.createObjectURL(fileupa1.files[0]));
};
});
答案 1 :(得分：1)
let jsonData2 = {
"path" : " newyear collage\/",
"info" : {
"author" : "",
"keywords" : "",
"file" : "newyear collage",
"date" : "sRGB",
"title" : "",
"description" : "Normal",
"generator" : "Export Kit v1.2.8"
},
"name" : "newyear collage",
"layers" : [
{
"x" : 0,
"height" : 612,
"layers" : [
{
"x" : 0,
"color" : "0xFFFFFF",
"height" : 612,
"y" : 0,
"width" : 612,
"shapeType" : "rectangle",
"type" : "shape",
"name" : "bg_rectangle"
},
{
"x" : 160,
"height" : 296,
"layers" : [
{
"x" : 0,
"height" : 296,
"src" : "6b8e734c46539dbc73f51e8f65d29fe3_frame0.png",
"y" : 0,
"width" : 429,
"type" : "image",
"name" : "mask_image_1"
},
{
"radius" : "26 \/ 27",
"color" : "0xACACAC",
"x" : 188,
"y" : 122,
"height" : 53,
"width" : 53,
"shapeType" : "ellipse",
"type" : "shape",
"name" : "useradd_ellipse1"
}
],
"y" : 291,
"width" : 429,
"type" : "group",
"name" : "user_image_1"
},
{
"x" : 25,
"height" : 324,
"layers" : [
{
"x" : 0,
"height" : 324,
"src" : "eb8e531ec340da14688a6343769286c0_frame1.png",
"y" : 0,
"width" : 471,
"type" : "image",
"name" : "mask_image_2"
},
{
"radius" : "26 \/ 27",
"color" : "0xACACAC",
"x" : 209,
"y" : 136,
"height" : 53,
"width" : 53,
"shapeType" : "ellipse",
"type" : "shape",
"name" : "useradd_ellipse_2"
}
],
"y" : 22,
"width" : 471,
"type" : "group",
"name" : "user_image_2"
}
],
"y" : 0,
"width" : 612,
"type" : "group",
"name" : "newyearcollage08"
}
]
};
let jsonData = {
"path": " UNEVENSHAPES\/",
"info": {
"author": "",
"keywords": "",
"file": "UNEVENSHAPES",
"date": "Uncalibrated",
"title": "",
"description": "Normal",
"generator": "Export Kit v1.2.8"
},
"name": "UNEVENSHAPES",
"layers": [{
"x": 0,
"height": 612,
"layers": [{
"x": 0,
"color": "0xFFFFFF",
"height": 612,
"y": 0,
"width": 612,
"shapeType": "rectangle",
"type": "shape",
"name": "rectangle1"
},
{
"x": 20,
"height": 377,
"layers": [{
"x": 0,
"height": 377,
"src": "d15ad70281961be451263b418a07798b_frame0.png",
"y": 0,
"width": 218,
"type": "image",
"name": "mask_pic1"
},
{
"radius": "27 \/ 27",
"color": "0xACACAC",
"x": 52,
"y": 257,
"height": 53,
"width": 53,
"shapeType": "ellipse",
"type": "shape",
"name": "useradd_ellipse1"
}
],
"y": 215,
"width": 218,
"type": "group",
"name": "user_pic1"
},
{
"x": 191,
"height": 120,
"layers": [{
"x": 0,
"height": 120,
"src": "2b5d28d0439bc3ce1d856e6c4e5607be_frame1.png",
"y": 0,
"width": 268,
"type": "image",
"name": "mask_pic2"
},
{
"radius": "26 \/ 27",
"color": "0xACACAC",
"x": 115,
"y": 43,
"height": 53,
"width": 53,
"shapeType": "ellipse",
"type": "shape",
"name": "useradd_ellipse2"
}
],
"y": 472,
"width": 268,
"type": "group",
"name": "user_pic2"
},
{
"x": 414,
"height": 302,
"layers": [{
"x": 0,
"height": 302,
"src": "52c93b6e0a0ffeeb670d0981f89f7fa5_frame2.png",
"y": 0,
"width": 178,
"type": "image",
"name": "mask_pic3"
},
{
"radius": "26 \/ 27",
"color": "0xACACAC",
"x": 69,
"y": 182,
"height": 53,
"width": 53,
"shapeType": "ellipse",
"type": "shape",
"name": "useradd_ellipse3"
}
],
"y": 290,
"width": 178,
"type": "group",
"name": "user_pic3"
},
{
"x": 374,
"height": 377,
"layers": [{
"x": 0,
"height": 377,
"src": "e92f354018aa8f7e6d279601a868a6b2_frame3.png",
"y": 0,
"width": 218,
"type": "image",
"name": "mask_pic4"
},
{
"radius": "26 \/ 27",
"color": "0xACACAC",
"x": 129,
"y": 60,
"height": 53,
"width": 53,
"shapeType": "ellipse",
"type": "shape",
"name": "useradd_ellipse4"
}
],
"y": 20,
"width": 218,
"type": "group",
"name": "user_pic4"
},
{
"x": 150,
"height": 120,
"layers": [{
"x": 0,
"height": 120,
"src": "010054750abb290d1bd7fcecfab60524_frame4.png",
"y": 0,
"width": 269,
"type": "image",
"name": "mask_pic5"
},
{
"radius": "27 \/ 27",
"color": "0xACACAC",
"x": 103,
"y": 15,
"height": 53,
"width": 53,
"shapeType": "ellipse",
"type": "shape",
"name": "useradd_ellipse5"
}
],
"y": 20,
"width": 269,
"type": "group",
"name": "user_pic5"
},
{
"x": 20,
"height": 302,
"layers": [{
"x": 0,
"height": 302,
"src": "e7a5874b58376883adbeafea7ce5e572_frame5.png",
"y": 0,
"width": 176,
"type": "image",
"name": "mask_pic6"
},
{
"radius": "26 \/ 27",
"color": "0xACACAC",
"x": 50,
"y": 68,
"height": 53,
"width": 53,
"shapeType": "ellipse",
"type": "shape",
"name": "useradd_ellipse6"
}
],
"y": 20,
"width": 176,
"type": "group",
"name": "user_pic6"
},
{
"x": 222,
"height": 335,
"layers": [{
"x": 0,
"height": 335,
"src": "591743efa89d8ee936a6d660d52e82b2_frame6.png",
"y": 0,
"width": 265,
"type": "image",
"name": "mask_pic7"
},
{
"radius": "26 \/ 27",
"color": "0xACACAC",
"x": 126,
"y": 114,
"height": 53,
"width": 53,
"shapeType": "ellipse",
"type": "shape",
"name": "useradd_ellipse7"
}
],
"y": 123,
"width": 265,
"type": "group",
"name": "user_pic7"
},
{
"x": 123,
"height": 334,
"layers": [{
"x": 0,
"height": 334,
"src": "22997a60cf61d7b59e92620b86ab86d6_frame7.png",
"y": 0,
"width": 264,
"type": "image",
"name": "mask_pic8"
},
{
"radius": "27 \/ 27",
"color": "0xACACAC",
"x": 73,
"y": 167,
"height": 53,
"width": 53,
"shapeType": "ellipse",
"type": "shape",
"name": "useradd_ellipse8"
}
],
"y": 155,
"width": 264,
"type": "group",
"name": "user_pic8"
}
],
"y": 0,
"width": 612,
"type": "group",
"name": "unevenshape04"
}]
};
function getData(data) {
var dataObj = {};
let layer1 = data.layers;
let layer2 = layer1[0].layers;
console.log('New Data');
for (i = 1; i < layer2.length; i++) {
var x = layer2[i].x;
var y = layer2[i].y;
var src = layer2[i].layers[0].src;
console.log(x,y,src);
}
}
getData(jsonData);
getData(jsonData2);