Resolving Image Saving Issues with canvas.toDataURL()

When attempting to utilize canvas.toDataURL() to save&&]When attempting to utilize canvas.toDataURL() to savean a canvasas s , you may encounter difficulties. Here's how to approach the situation:

問題與解決方案

問題：

.是用來保存畫布圖像的程式碼，但它不起作用：

// Canvas named "canvasSignature"

JavaScript:

function putImage() {
  var canvas1 = document.getElementById("canvasSignature");
  if (canvas1.getContext) {
    var ctx = canvas1.getContext("2d");
    var myImage = canvas1.toDataURL("image/png");
  }
  var imageElement = document.getElementById("MyPix");
  imageElement.src = myImage;
}

HTML5:


  Save as Image

解決方案：

程式碼中缺少將映像轉換為二進位流的步驟。修改程式碼為：

var image = canvas.toDataURL("image/png").replace("image/png", "image/octet-stream");

window.location.href = image; // Save locally

透過將圖像轉換為二進位流並將其視為文件，程式碼可以本地保存該映像。