ios - UIPageViewController 有条件地转到下一页
<p><p>我有 <code>UIPageViewController</code>，我可以使用下面的委托(delegate)方法进入下一页和上一页。</p>
<pre><code>- (UIViewController *)pageViewController:(UIPageViewController *)pageViewController viewControllerBeforeViewController:(UIViewController *)viewController
{
if (])
return nil;
if(_counter < 1) {
return nil;
}
self.view.backgroundColor = ;
return ;
}
</code></pre>
<p><strong>编辑:</strong></p>
<pre><code>- (UIViewController *)pageViewController:(UIPageViewController *)pageViewController viewControllerAfterViewController:(UIViewController *)viewController
{
//NSLog(@"Child controller count= %lu",(unsigned long)pageViewController.childViewControllers.count);
if (])
return nil;
if(])
{
TableViewController *viewController1 = (TableViewController*) viewController;
if (viewController1.dataArr.count < 5) {
return nil;
}
}
return ;
}
</code></pre>
<p>现在如果满足某些条件，我想转到下一页。喜欢最后一页<strong>viewController.isCheck == true</strong>。</p>
<p>我怎样才能做到这一点？</p></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>您可以将该条件添加到现有 if 之一，如果条件未得到验证，则返回 nil。比如:</p>
<pre><code>- (UIViewController *)pageViewController:(UIPageViewController *)pageViewController viewControllerAfterViewController:(UIViewController *)viewController
{
if (] || ((YourViewControllerClass *)viewController).isCheck == false)
return nil;
return ;
}
</code></pre></p>
<p style="font-size: 20px;">关于ios - UIPageViewController 有条件地转到下一页，我们在Stack Overflow上找到一个类似的问题：
<a href="https://stackoverflow.com/questions/40213526/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/40213526/
</a>
</p>
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