Taro中子组件调用父组件方法的问题

[lightman]

父组件定义方法：

type PageStateProps = {
	OrderStore: {
		getOrders: Function;
		orders: Array<any>;
		onAcceipt: Function;
		confirmModalState: boolean;
	};
	onAcceptOrder: Function;
};

onAcceptOrder() {
  console.log(this);
}

{orders.map((item) => {
   return <OrderItem orderItem={item} key={item.workOrderId} onAcceptOrder={this.onAcceptOrder} />;
})}
};

子组件中

type PageStateProps = {
	orderItem: {
		workOrderId: string;
		workOrderNo: string;
		content: string;
		createTime: string;
		workOrderStatus: number;
		createUserName: string;
		acceptUserName: string;
		productName: string;
		productClassificationName: string;
	};
	onAcceptOrder: Function;



onAcceptOrder = () => {
   console.log(this);
  this.props.onAcceptOrder();
};

<AtButton className='btn-accept' onClick={this.onAcceptOrder}>接单</AtButton>

点击"接单"按钮以后会报this.props.onAcceptOrder is not a function，打印this.props中也没有onAcceptOrder这个方法