無法刪除帆布和變化SRC通過其ID：面料JS

Question

我想通過自己的ID刪除帆布我試着給它們分配ID可以調用刪除方法，但它不工作：

見鏈接：http://jsfiddle.net/mishragaurav31/kcyKJ/

的html代碼：

刪除itchange它

js代碼

var canvas = new fabric.Canvas('c'); 

     function getObjectById(id) { 
      canvas.forEachObject(function(o) { 
       if (o.id === id) { 
        return o; 
       } 
      }); 
      return null; 
     } 

    var img = "http://edudemic.com/wp-content/uploads/2012/09/jail_photo.jpg"; 

     fabric.Image.fromURL(img, function (source) { 
     img = source.set({ 
      left: 0, 
      top: 0, 
      angle: 0, 
      id:'moveit' 
     }); 
     canvas.add(img); 
     canvas.renderAll(); 
     }); 

     document.getElementById('download').onclick = function() { 
      alert('hii'); 
     var removeit = getObjectById('moveit'); 
      canvas.remove(removeit); 
     }; 

     document.getElementById('changeimage').onclick = function() { 
      alert('hii'); 
     getObjectById('moveit').src="http://www.meandmylaptop.com/uploads/5/8/1/2/5812329/7801574.png"; 
      canvas.renderAll(); 
     }; 

document.getElementById('changeimage').onclick = function() { 
      alert('hii'); 
     getObjectById('moveit').src="http://www.meandmylaptop.com/uploads/5/8/1/2/5812329/7801574.png"; 
      canvas.renderAll(); 
     }; 

Answer 1

Demo

變化

alert('hii'); 
    var removeit = getObjectById('moveit'); 
    canvas.remove(removeit); 

要

//  alert('hii'); 
canvas.remove(img); 
// var removeit = getObjectById('moveit'); 
//  canvas.remove(removeit);