角度图像裁剪

Question

我正在尝试上传文件并裁剪屏幕上显示的图像，但是我一直都在看到此错误-知道吗？

ERROR TypeError: Cannot read property 'setImage' of undefined
    at FileReader.myReader.onloadend

我在文件上传方法中设置了setImage（Image），如下所示，但仍然给我带来了问题-

fileChangeListener($event) {
    myReader.onloadend = function (loadEvent:any) {
    image.src = loadEvent.target.result;
    that.cropper1.setImage(image);
  };
}

Answer 1

fileChangeListener($event) {
  myReader.onloadend = (loadEvent:any) => {   // replace function with => arrow 
  image.src = loadEvent.target.result;
  this.cropper1.setImage(image);            // that should be this
 };
}