在有的時候，我們不需要手勢返回功能，那麼可以在頁面中新增以下程式碼：

- (void)viewDidAppear:(BOOL)animated
{
    [super viewDidAppear:animated];

    // 禁用 iOS7 返回手勢
    if ([self.navigationController respondsToSelector:@selector(interactivePopGestureRecognizer)]) {
        self.navigationController.interactivePopGestureRecognizer.enabled = NO;
    }
}

- (void)viewWillDisappear:(BOOL)animated
{
    [super viewWillDisappear:animated];

    // 開啟
    if ([self.navigationController respondsToSelector:@selector(interactivePopGestureRecognizer)]) {
        self.navigationController.interactivePopGestureRecognizer.enabled = YES;
    }
}