使用 Backbone 0.9.2 我试图取消绑定视图中的某些元素,但出现以下错误
未捕获的类型错误:无法调用未定义的方法“取消绑定”
console.log('+++ Kill: ', this);
this.model.unbind( 'change', this.render, this ); // Unbind reference to the model
this.options.parent.unbind( 'close:all', this.close, this ); // Unbind reference to the parent view
delete this.$el; // Delete the jQuery wrapped object variable
delete this.el; // Delete the variable reference to this node
知道如何解决这个错误吗?