ios - filterContentForSearchText :scope: method come from? 在哪里
<p><p>最近，我注意到 <code>filterContentForSearchText:scope:</code> 出现在多个关于如何实现搜索栏的教程中。</p>
<p>但是，我查找了 <code>UISearchDisplayDelegate 和 UISearchBarDelegate</code> 的引用。我发现这个 <code>filterContentForSearchText:scope:</code> 既不是必需的也不是可选的方法。</p>
<p>我想知道 <code>filterContentForSearchText:scope:</code> 是否只是过滤搜索结果的常规方法名称？</p></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>是的，这只是从 <code>UISearchDisplayDelegate</code> 方法调用的常用方法的约定</p>
<pre><code>- (BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchString:(NSString *)searchString;
- (BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchScope:(NSInteger)searchOption;
</code></pre>
<p>当前<a href="https://developer.apple.com/library/ios/samplecode/TableSearch/Introduction/Intro.html" rel="noreferrer noopener nofollow">"Simple UISearchBar with State Restoration"</a>
Apple 的示例项目<em>不</em>使用此约定:</p>
<pre><code>- (BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchString:(NSString *)searchString
{
NSString *scope;
NSInteger selectedScopeButtonIndex = ;
if (selectedScopeButtonIndex > 0)
{
scope = [ objectAtIndex:(selectedScopeButtonIndex - 1)];
}
;
// Return YES to cause the search result table view to be reloaded.
return YES;
}
</code></pre></p>
<p style="font-size: 20px;">关于ios - filterContentForSearchText :scope: method come from? 在哪里，我们在Stack Overflow上找到一个类似的问题：
<a href="https://stackoverflow.com/questions/23199678/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/23199678/
</a>
</p>
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