iphone - 将 IndexPath 传递给 subview
<p><p>您好，我正在尝试将 indexvalue 从我的父 View 传递到我的 subview ，如下所示
//main.m</p>
<pre><code>SubViewController *subViewController = [ init];
subViewController.parentViewSelectedIndexPath = indexPath;
</code></pre>
<p>但是，当我尝试检查该值是否已像这样传递给 subview 时</p>
<p>//sub.m</p>
<pre><code>- (void)viewDidLoad
{
//
NSLog(@"%@", parentViewSelectedIndexPath);
//
</code></pre>
<p>侧倾
子.h</p>
<pre><code>//
@interface VehicleResultViewController : UITableViewController {
//
NSIndexPath *parentViewSelectedIndexPath;
//
@property (nonatomic, retain) NSIndexPath *parentViewSelectedIndexPath;
//
@end
</code></pre>
<blockquote>
<p>//Answer</p>
<p>subview loads before it gets the indexpath being passed to is.. so I
had to use a method that is executed later
i.s.(didselectrowatindexpath) this printed out the correct indexpath
that was sent to it from the main view.</p>
</blockquote>
<p>它在控制台上打印 (null).. 我做错了吗？</p></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>添加一些 <code>NSLog</code> 来确定调用顺序，@Kevin 指出 <code>viewDidLoad</code> 可能会在设置属性之前被调用。</p>
<p>另外，如果 <code>indexPath</code> 总是在 <code>subViewController</code> 被实例化时设置，最好使用 <code>indexPath</code> 作为参数来创建您自己的指定初始化程序.如果@Kevin 给出了这个答案。</p></p>
<p style="font-size: 20px;">关于iphone - 将 IndexPath 传递给 subview ，我们在Stack Overflow上找到一个类似的问题：
<a href="https://stackoverflow.com/questions/7640140/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/7640140/
</a>
</p>
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