Base64 编码图像未显示 [重复]答案

【问题标题】：Base64 Encoded Image Not Showing Up [duplicate]Base64 编码图像未显示 [重复]
【发布时间】：2021-10-01 22:55:03
【问题描述】：

我正在使用 dataUrl 并将图像的 src 设置为 url，但是当我这样做时图像没有显示。为图像创建了空间，但它是空白的。

var rUrl = received.pngUrl;
var image = new Image();
image.onload = function(){

};   
image.src = rUrl;
document.body.appendChild(image);

Should setting an image src to data URL be available immediately?

我看到这篇关于使用 image.onload 的帖子。我尝试在 onload 函数中设置 image.src = rUrl 但它不会执行。我的 rUrl 格式为“data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAu4AAALu...”

其他相关代码：

$('#submit').click(function(){
   var pickedImage = new Image();
   pickedImage.src = "{% static '/draw/hurricane.PNG' %}"
   pickedImage.onload = function() {
       context.drawImage(pickedImage, 0, 0);
   }
   var pngUrl = canvas.toDataURL();
   socket.send(JSON.stringify({pngUrl}));
});

socket.onmessage = function(receivedMessage) {
    var received = JSON.parse(receivedMessage.data);
    
    ...(code from above)...
}

我正在使用这张灰色的飓风图像。它应该显示在汽车图像下方，并且有一个空白区域，但我看不到图像。开发工具显示它有一个 img src。

灰色飓风图片

开发工具

图片src是这个。有什么问题吗？

data:image/png;base64,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

【问题讨论】：

你的 Base64 是否正确？我用随机编码的图像测试了您的代码，并且运行良好。多一点概念可能会帮助我们解决您的问题。如果可能，请提供更多代码部分。
@NagySzabolcs 可以添加。嗯，那我不确定。当我在检查中单击时，图像 src 链接到白色/空白图像。
你的开发工具控制台说什么？
@Mike'Pomax'Kamermans 添加了
不，请记住：don't post pictures of text: post that text，但请记住只发布相关内容：是否存在控制台错误？如果是这样，请发布这些。按预期工作的事情，您不需要添加到您的帖子中。此外，此时您已经远离minimal reproducible example 领域：您想稍微控制一下。

标签： javascript base64 onload src todataurl

【解决方案1】：

嗯，base64 代码也不适用于我。我将该图像转换为base64并且工作正常。也许你的转换器有问题。尝试使用不同的图像转换您的图像。 Here 就是一个例子。

无论如何，您附加的相关代码并不是最好的，其中缺少很多东西。正如其他人之前链接的那样，有一些关于如何有效提问的基本教程。我建议jsfiddle 对您的代码进行基本修改，以便我们对其进行编辑，我们会更快地找到解决方案。

希望能帮到你！

【讨论】：

我猜我的照片是问题所在。不知道为什么。使用来自 webrtc-capture 的图片与我的代码配合使用。
也许你得到了错误的 base64 转换。尝试为此使用另一个功能，就像我建议的那样。我希望你的问题能得到解决！