我在 iPhone 11 Pro Max 上使用 Ionic 应用程序时遇到一些外观问题：
如何改善和解决屏幕上下有空白的问题？
**UPDATE
这是我的 config.xml：
<platform name="ios">
<allow-intent href="itms:*" />
<allow-intent href="itms-apps:*" />
<icon height="57" src="resources/ios/icon/icon.png" width="57" />
<icon height="114" src="resources/ios/icon/[email protected] /cdn-cgi/l/email-protection" width="114" />
<icon height="29" src="resources/ios/icon/icon-small.png" width="29" />
<icon height="58" src="resources/ios/icon/[email protected] /cdn-cgi/l/email-protection" width="58" />
<icon height="87" src="resources/ios/icon/[email protected] /cdn-cgi/l/email-protection" width="87" />
<icon height="20" src="resources/ios/icon/icon-20.png" width="20" />
<icon height="40" src="resources/ios/icon/[email protected] /cdn-cgi/l/email-protection" width="40" />
<icon height="60" src="resources/ios/icon/[email protected] /cdn-cgi/l/email-protection" width="60" />
<icon height="48" src="resources/ios/icon/[email protected] /cdn-cgi/l/email-protection" width="48" />
<icon height="55" src="resources/ios/icon/[email protected] /cdn-cgi/l/email-protection" width="55" />
<icon height="29" src="resources/ios/icon/icon-29.png" width="29" />
<icon height="58" src="resources/ios/icon/[email protected] /cdn-cgi/l/email-protection" width="58" />
<icon height="87" src="resources/ios/icon/[email protected] /cdn-cgi/l/email-protection" width="87" />
<icon height="40" src="resources/ios/icon/icon-40.png" width="40" />
<icon height="80" src="resources/ios/icon/[email protected] /cdn-cgi/l/email-protection" width="80" />
<icon height="120" src="resources/ios/icon/[email protected] /cdn-cgi/l/email-protection" width="120" />
<icon height="88" src="resources/ios/icon/[email protected] /cdn-cgi/l/email-protection" width="88" />
<icon height="50" src="resources/ios/icon/icon-50.png" width="50" />
<icon height="100" src="resources/ios/icon/[email protected] /cdn-cgi/l/email-protection" width="100" />
<icon height="60" src="resources/ios/icon/icon-60.png" width="60" />
<icon height="120" src="resources/ios/icon/[email protected] /cdn-cgi/l/email-protection" width="120" />
<icon height="180" src="resources/ios/icon/[email protected] /cdn-cgi/l/email-protection" width="180" />
<icon height="72" src="resources/ios/icon/icon-72.png" width="72" />
<icon height="144" src="resources/ios/icon/[email protected] /cdn-cgi/l/email-protection" width="144" />
<icon height="76" src="resources/ios/icon/icon-76.png" width="76" />
<icon height="152" src="resources/ios/icon/[email protected] /cdn-cgi/l/email-protection" width="152" />
<icon height="167" src="resources/ios/icon/[email protected] /cdn-cgi/l/email-protection" width="167" />
<icon height="172" src="resources/ios/icon/[email protected] /cdn-cgi/l/email-protection" width="172" />
<icon height="196" src="resources/ios/icon/[email protected] /cdn-cgi/l/email-protection" width="196" />
<icon height="1024" src="resources/ios/icon/icon-1024.png" width="1024" />
<splash height="480" src="resources/ios/splash/Default~iphone.png" width="320" />
<splash height="960" src="resources/ios/splash/Default@2x~iphone.png" width="640" />
<splash height="1024" src="resources/ios/splash/Default-Portrait~ipad.png" width="768" />
<splash height="768" src="resources/ios/splash/Default-Landscape~ipad.png" width="1024" />
<splash height="1125" src="resources/ios/splash/Default-Landscape-2436h.png" width="2436" />
<splash height="1242" src="resources/ios/splash/Default-Landscape-736h.png" width="2208" />
<splash height="2048" src="resources/ios/splash/Default-Portrait@2x~ipad.png" width="1536" />
<splash height="1536" src="resources/ios/splash/Default-Landscape@2x~ipad.png" width="2048" />
<splash height="2732" src="resources/ios/splash/Default-Portrait@~ipadpro.png" width="2048" />
<splash height="2048" src="resources/ios/splash/Default-Landscape@~ipadpro.png" width="2732" />
<splash height="1136" src="resources/ios/splash/Default-568h@2x~iphone.png" width="640" />
<splash height="1334" src="resources/ios/splash/Default-667h.png" width="750" />
<splash height="2208" src="resources/ios/splash/Default-736h.png" width="1242" />
<splash height="2436" src="resources/ios/splash/Default-2436h.png" width="1125" />
<splash height="2732" src="resources/ios/splash/Default@2x~universal~anyany.png" width="2732" />
</platform>
<plugin name="cordova-plugin-whitelist" spec="1.3.3" />
<plugin name="cordova-plugin-statusbar" spec="2.4.2" />
<plugin name="cordova-plugin-device" spec="2.0.2" />
<plugin name="cordova-plugin-splashscreen" spec="5.0.2" />
<plugin name="cordova-plugin-ionic-webview" spec="^4.0.0" />
<plugin name="cordova-plugin-ionic-keyboard" spec="^2.0.5" />
我已点击可能重复的链接，但不幸的是我无法全屏显示该应用程序。我还添加了这个元信息index.html:
<meta name="viewport" content="initial-scale=1, width=device-width, height=device-height, viewport-fit=cover">
省略viewport-fit=cover声明： ionic-webview 基于 WKWebview，如果您不在该元标记中覆盖它，WKWebview 会为您处理它。
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