预先道歉，我对React非常陌生。

在printDocument我设置oHiddFrame.onload = this.setPrint;
甚至this.setPrint，但我得到的误差Cannot set property '__container__' of undefined为this在setPrint第一个任务。

我onClick={this.printDocument.bind(null, this.props.document.view_href)}在render（）中设置按钮。如何将“ this”绑定到分配给它的实际事件？

非常感谢任何帮助或建议。

  closePrint: function () {
    document.body.removeChild(this.oHiddFrame.__container__);
  },

  setPrint: function () {
    this.contentWindow.__container__ = this;
    this.contentWindow.onbeforeunload = this.closePrint;
    this.contentWindow.onafterprint = this.closePrint;
    this.contentWindow.focus();
    this.contentWindow.print();
  },

  printDocument: function (url) {
    var oHiddFrame = document.createElement("iframe");
    oHiddFrame.onload = this.setPrint;
    oHiddFrame.style.visibility = "hidden";
    oHiddFrame.style.position = "fixed";
    oHiddFrame.style.right = "0";
    oHiddFrame.style.bottom = "0";
    oHiddFrame.src = url;
    document.body.appendChild(oHiddFrame);
  },