我有关于将图像写入图像的问题。我需要循环图像。但是我遇到了一些问题。当我这样做时,最后一个图像显示和图像大小很小。有人帮帮我吗?
var div=document.getElementById("locations");
var canvas;
window.onload = function(){
for(var i=0;i<10;i++){
canvas=document.createElement("canvas");
canvas.style.width="75px";
canvas.style.height="75px"
var context = canvas.getContext("2d");
var imageObj = new Image();
imageObj.onload = function(){
context.drawImage(imageObj, 0, 0);
context.font = "17px Calibri";
context.fillText(i, 30, 36);
};
imageObj.src = "image.png";
div.appendChild(canvas);
};
}
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<div id="locations"></div>
<canvas id="myCanvas" width="75" height="75"></canvas>
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结果图片
答案 0 :(得分:0)
使用canvas.height和width值代替CSS样式。绘制画布后应用的CSS样式值。
var div=document.getElementById("locations");
var canvas;
window.onload = function(){
for(var i=0;i<10;i++){
canvas=document.createElement("canvas");
canvas.width=75;
canvas.height=75;
var context = canvas.getContext("2d");
var imageObj = new Image();
imageObj.onload = function(){
context.drawImage(imageObj, 0, 0);
context.font = "17px Calibri";
context.fillText(i, 30, 36);
};
imageObj.src = "http://placehold.it/350x150";
div.appendChild(canvas);
};
}
&#13;
<div id="locations"></div>
&#13;