ios tableview单选

最新推荐文章于 2024-08-01 04:34:57 发布

转载最新推荐文章于 2024-08-01 04:34:57 发布 · 413 阅读

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本文介绍了如何在Objective-C中设置默认选中项，并实现滑动时选择项的变化效果，包括记录上一次选择的行、更新当前选择的行样式以及更新默认选择项。

 //设置默认选中

<code class="hljs objectivec has-numbering">    <span class="hljs-built_in">NSIndexPath</span>*defaultIndexPath = [<span class="hljs-built_in">NSIndexPath</span> indexPathForRow:<span class="hljs-number">0</span> inSection:<span class="hljs-number">0</span>];
    [<span class="hljs-keyword">self</span> tableView:<span class="hljs-keyword">self</span><span class="hljs-variable">.tableView</span> didSelectRowAtIndexPath:defaultIndexPath];</code>

<code class="hljs objectivec has-numbering"></code>

<code class="hljs objectivec has-numbering">- (<span class="hljs-keyword">void</span>)tableView:(<span class="hljs-built_in">UITableView</span> *)tableView didSelectRowAtIndexPath:(<span class="hljs-built_in">NSIndexPath</span> *)indexPath{         <span class="hljs-comment">//当前cell row  </span>         <span class="hljs-built_in">NSInteger</span> newRow = [indexPath row];         <span class="hljs-comment">//记录上一次cell row</span>         <span class="hljs-built_in">NSInteger</span> oldRow = (<span class="hljs-keyword">self</span><span class="hljs-variable">.lastIndexPath</span> != <span class="hljs-literal">nil</span>) ? [<span class="hljs-keyword">self</span><span class="hljs-variable">.lastIndexPath</span> row] : -<span class="hljs-number">1</span>;        <span class="hljs-keyword">if</span> (newRow != oldRow)          {               <span class="hljs-comment">//选中cell</span>               CustomTableViewCell *newcell =  [tableView cellForRowAtIndexPath:indexPath];               newcell<span class="hljs-variable">.selectImage</span><span class="hljs-variable">.hidden</span> = <span class="hljs-literal">NO</span>;               <span class="hljs-comment">//取消上一次选中cell</span>              CustomTableViewCell *oldCell = [tableView cellForRowAtIndexPath:<span class="hljs-keyword">self</span><span class="hljs-variable">.lastIndexPath</span>];               oldCell<span class="hljs-variable">.selectImage</span><span class="hljs-variable">.hidden</span> = <span class="hljs-literal">YES</span>;          }            <span class="hljs-keyword">self</span><span class="hljs-variable">.lastIndexPath</span> = indexPath;}</code>