| 注册
请输入搜索内容

热门搜索

Java Linux MySQL PHP JavaScript Hibernate jQuery Nginx
pxjm2077
7年前发布

iOS开源:UITableView - 高度缓存库

   <h2>It is translation of the <a href="/misc/goto?guid=4958873479117876841" rel="nofollow,noindex">UITableView-FDTemplateLayoutCell</a> by Swift</h2>    <h2>Overview</h2>    <p>It can be through the Auto layout and Frame layout way to obtain the height of the cell, and you can use the same key or indexpath way to cache the height of the cell</p>    <p style="text-align:center"><img src="https://simg.open-open.com/show/aae13cc2fa93e24103c63e819c0dad88.gif"></p>    <h2>Installation</h2>    <ul>     <li>CocoaPods</li>    </ul>    <pre>  <code class="language-objectivec">pod 'FDTemplateLayoutCell'</code></pre>    <ul>     <li>Carthage</li>    </ul>    <pre>  <code class="language-objectivec">github "huangboju/FDTemplateLayoutCell.swift"</code></pre>    <h2>Usage</h2>    <ul>     <li>No cache</li>    </ul>    <pre>  <code class="language-objectivec">override func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {          return tableView.fd_heightForCell(with: "cell") { (cell) in          // Configure this cell with data, same as what you've done in "-tableView:cellForRowAtIndexPath:"          // Like:          //    cell.data = datas[indexPath.row]          }    }</code></pre>    <ul>     <li>IndexPath cache</li>    </ul>    <pre>  <code class="language-objectivec">override func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {          return tableView.fd_heightForCell(with: "cell", cacheBy: indexPath) { (cell) in          // Configure this cell with data, same as what you've done in "-tableView:cellForRowAtIndexPath:"          // Like:          //    cell.data = datas[indexPath.row]          }    }</code></pre>    <ul>     <li>Key cache</li>    </ul>    <pre>  <code class="language-objectivec">override func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {          return tableView.fd_heightForCell(with: "cell", cacheByKey: entity.identifier ?? "") { (cell) in          // Configure this cell with data, same as what you've done in "-tableView:cellForRowAtIndexPath:"          // Like:          //    cell.data = datas[indexPath.row]          }    }</code></pre>    <h2>Frame layout mode</h2>    <p>FDTemplateLayoutCell.swift offers 2 modes for asking cell's height.</p>    <ul>     <li>Auto layout mode using "-systemLayoutSizeFittingSize:"</li>     <li>Frame layout mode using "-sizeThatFits:"</li>    </ul>    <p>You can use this API change mode for asking cell's height,default is true, because use "frame layout" rather than "auto layout".</p>    <pre>  <code class="language-objectivec">cell.fd_usingFrameLayout = false</code></pre>    <p>And if you're using frame layout mode, you must override func sizeThatFits(_ size: CGSize) -> CGSize in your customized cell and return content view's height (separator excluded)</p>    <pre>  <code class="language-objectivec">override func sizeThatFits(_ size: CGSize) -> CGSize {          return CGSize(width: size.width, height: h1 + h2 + ... + hn)      }</code></pre>    <h2>Debug log</h2>    <p>Debug log helps to debug or inspect what is this "FDTemplateLayoutCell.swift" extention doing, turning on to print logs when "calculating", "precaching" or "hitting cache".Default to "false", log by "print".</p>    <pre>  <code class="language-objectivec">tableView.fd_debugLogEnabled = true</code></pre>    <p>It will print like this:</p>    <pre>  <code class="language-objectivec">** FDTemplateLayoutCell ** hit cache by index path[0, 17] - 123.5  ** FDTemplateLayoutCell ** hit cache by index path[0, 18] - 237.5  ** FDTemplateLayoutCell ** hit cache by index path[0, 18] - 237.5  ** FDTemplateLayoutCell ** hit cache by index path[0, 19] - 159.5  ** FDTemplateLayoutCell ** hit cache by index path[0, 19] - 159.5  ** FDTemplateLayoutCell ** hit cache by index path[0, 20] - 262.0  ** FDTemplateLayoutCell ** hit cache by index path[0, 20] - 262.0  ** FDTemplateLayoutCell ** hit cache by index path[0, 21] - 288.0  ** FDTemplateLayoutCell ** hit cache by index path[0, 21] - 288.0  ** FDTemplateLayoutCell ** hit cache by index path[0, 22] - 299.0  ** FDTemplateLayoutCell ** hit cache by index path[0, 22] - 299.0  ** FDTemplateLayoutCell ** hit cache by index path[0, 23] - 176.5</code></pre>    <h2>About self-satisfied cell</h2>    <p>a fully <strong>self-satisfied</strong> cell is constrainted by auto layout and each edge("top", "left", "bottom", "right") has at least one layout constraint against it. It's the same concept introduced as "self-sizing cell" in iOS8 using auto layout.</p>    <p>A bad one :( - missing right and bottom <img src="https://simg.open-open.com/show/87a46393fdc687c9d19a3642fb2c22f1.png"></p>    <p>A good one :)</p>    <p style="text-align:center"><img src="https://simg.open-open.com/show/86689059d173e77a1da6cd0a1065e609.png"></p>    <h2>Notes</h2>    <p>A template layout cell is created by dequeueReusableCell(withIdentifier: <#T##String#>) method, it means that you MUST have registered this cell reuse identifier by one of:</p>    <ul>     <li>A prototype cell of UITableView in storyboard.</li>     <li>Use register(UINib, forCellReuseIdentifier: String)</li>     <li>Use register(AnyClass, forCellReuseIdentifier: String)</li>    </ul>    <h2>Contact</h2>    <p>If you find an issue, just open a ticket. Pull requests are warmly welcome as well.</p>    <h3>License</h3>    <p>FDTemplateLayoutCell.swift is released under the MIT license. See LICENSE for details.</p>    <p> </p>    
 本文由用户 pxjm2077 自行上传分享,仅供网友学习交流。所有权归原作者,若您的权利被侵害,请联系管理员。
 转载本站原创文章,请注明出处,并保留原始链接、图片水印。
 本站是一个以用户分享为主的开源技术平台,欢迎各类分享!
 本文地址:https://www.open-open.com/lib/view/open1488174010158.html
iOS开发 移动开发 UITableView