.m

    // 监听通知
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(receiveCartDataChangedNotification:) name:@"CartDataChangedNotification" object:nil];

    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(receiveAlipayResultNotification:) name:@"AlipayResultNotification" object:nil];

- (void)dealloc {
    [[NSNotificationCenter defaultCenter] removeObserver:self];
}

/// 接收到购物车数据改变
- (void)receiveCartDataChangedNotification:(NSNotification *)notification {
    self.cartDataChanged = YES;
}

- (void)receiveAlipayResultNotification:(NSNotification *)notification {
    [self handleAlipayResult:notification.userInfo];
}
        // 通知购物车数据已改变
        [[NSNotificationCenter defaultCenter] postNotificationName:@"CartDataChangedNotification" object:self];

            [[NSNotificationCenter defaultCenter] postNotificationName:@"AlipayResultNotification" object:self userInfo:resultDic];