[iOS] Textarea组件在使用的时候，首次出现异常卡顿的情况

[zbser]

使用的weex版本是 0.28.0，iOS环境下，Xcode Version 11.3 (11C29) 第一次渲染会出现卡顿的情况，卡顿时间有点长，感受很明显。 而且把整个vue文件就精简到就一个<textarea>的依然如此...</p> <p>Xcode还会打印出如下的信息： 2019-12-29 23:19:54.618318+0800 weextoolkit[9827:2216298] [reports] Main Thread Checker: UI API called on a background thread: -[UITextView font] PID: 9827, TID: 2216298, Thread name: com.taobao.weex.component, Queue name: com.apple.root.default-qos.overcommit, QoS: 0 Backtrace: 4 weextoolkit 0x0000000100fc570c __35-[WXTextAreaComponent measureBlock]_block_invoke + 340 5 weextoolkit 0x0000000100e7293c ZL18flexCssNodeMeasurePN8WeexCore16WXCoreLayoutNodeEfNS_11MeasureModeEfS2 + 336 6 weextoolkit 0x0000000100d6d188 _ZN8WeexCore16WXCoreLayoutNode15measureLeafNodeEffbb + 304 7 weextoolkit 0x0000000100d6cb08 _ZN8WeexCore16WXCoreLayoutNode19hypotheticalMeasureEffb + 116 8 weextoolkit 0x0000000100d6dca4 _ZN8WeexCore16WXCoreLayoutNode12measureChildEPS0_fffbb + 364 9 weextoolkit 0x0000000100d6ccd4 _ZN8WeexCore16WXCoreLayoutNode19measureInternalNodeEffbb + 404 10 weextoolkit 0x0000000100d6cae4 _ZN8WeexCore16WXCoreLayoutNode19hypotheticalMeasureEffb + 80 11 weextoolkit 0x0000000100d6ba6c _ZN8WeexCore16WXCoreLayoutNode7measureEffb + 68 12 weextoolkit 0x0000000100d6b410 _ZN8WeexCore16WXCoreLayoutNode15calculateLayoutERKNSt3<strong>14pairIffEE + 252 13 weextoolkit 0x0000000100deb978 _ZN8WeexCore10RenderPage15CalculateLayoutEv + 116 14 weextoolkit 0x0000000100def884 _ZN8WeexCore10RenderPage11LayoutInnerEv + 28 15 weextoolkit 0x0000000100def970 _ZN8WeexCore10RenderPage17LayoutImmediatelyEv + 40 16 weextoolkit 0x0000000100d2b154 _ZN8WeexCore18CoreSideInPlatform11ForceLayoutERKNSt3</strong>112basic_stringIcNS1_11char_traitsIcEENS1_9allocatorIcEEEE + 72 17 weextoolkit 0x0000000100ec1b34 +[WXCoreBridge layoutPage:forced:] + 424 18 weextoolkit 0x0000000100ea0e60 -[WXComponentManager _layout] + 156 19 weextoolkit 0x0000000100ea0d38 -[WXComponentManager _layoutAndSyncUI] + 40 20 weextoolkit 0x0000000100ea0a20 -[WXComponentManager _handleDisplayLink] + 352 21 weextoolkit 0x0000000100ea2170 -[WXComponentManager handleDisplayLink] + 40 22 weextoolkit 0x0000000100ee4b64 -[WXDisplayLinkManager _handleDisplayLink] + 304 23 GPUToolsCore 0x00000001020695f8 -[DYDisplayLinkInterposer forwardDisplayLinkCallback:] + 168 24 QuartzCore 0x00000001a2ebb88c 84C3CD6E-F832-3F6F-BE62-5A4348853273 + 71820 25 QuartzCore 0x00000001a2f85694 84C3CD6E-F832-3F6F-BE62-5A4348853273 + 898708 26 CoreFoundation 0x000000019c4e38ac 1B9B1E61-8CB4-3903-9870-402C3DE959BB + 526508 27 CoreFoundation 0x000000019c50d07c 1B9B1E61-8CB4-3903-9870-402C3DE959BB + 696444 28 CoreFoundation 0x000000019c50c7a8 1B9B1E61-8CB4-3903-9870-402C3DE959BB + 694184 29 CoreFoundation 0x000000019c50767c 1B9B1E61-8CB4-3903-9870-402C3DE959BB + 673404 30 CoreFoundation 0x000000019c506adc CFRunLoopRunSpecific + 464 31 Foundation 0x000000019c8467f4 503900AF-2ECD-329F-B742-C07C3E672BEB + 30708 32 weextoolkit 0x0000000100e93c38 -[WXComponentManager _runLoopThread] + 332 33 Foundation 0x000000019c9770a4 503900AF-2ECD-329F-B742-C07C3E672BEB + 1278116 34 libsystem_pthread.dylib 0x000000019c2a9d8c _pthread_start + 156 35 libsystem_pthread.dylib 0x000000019c2ad76c thread_start + 8</p> <p>有具体解决方案吗？</p> </div> </div> <div class="comment"> <div class="user"> <a rel="noreferrer nofollow" target="_blank" href="https://github.com/YorkShen"><img src="https://avatars.githubusercontent.com/u/4162544?v=4" />YorkShen</a> commented <strong> 4 years ago</strong> </div> <div class="markdown-body"> <p>Try a release app, not debug one.</p> <p>And don't bundle any debug toolkit in it.</p> <p>The <code>weextoolkit</code> you're using is for debugging purpose only.</p> </div> </div> <div class="comment"> <div class="user"> <a rel="noreferrer nofollow" target="_blank" href="https://github.com/zbser"><img src="https://avatars.githubusercontent.com/u/20149809?v=4" />zbser</a> commented <strong> 4 years ago</strong> </div> <div class="markdown-body"> <p>我们尝试了发布 TestFlight，进行测试，确实这个问题没有再发生，整个加载没有卡顿，很神奇...</p> </div> </div> <div class="page-bar-simple"> </div> <div class="footer"> <ul class="body"> <li>© <script> document.write(new Date().getFullYear()) </script> Githubissues.</li> <li>Githubissues is a development platform for aggregating issues.</li> </ul> </div> <script src="https://cdn.jsdelivr.net/npm/jquery@3.5.1/dist/jquery.min.js"></script> <script src="/githubissues/assets/js.js"></script> <script src="/githubissues/assets/markdown.js"></script> <script src="https://cdn.jsdelivr.net/gh/highlightjs/cdn-release@11.4.0/build/highlight.min.js"></script> <script src="https://cdn.jsdelivr.net/gh/highlightjs/cdn-release@11.4.0/build/languages/go.min.js"></script> <script> hljs.highlightAll(); </script> </body> </html>