Ionic 3 - IOS启动画面以纵向而非横向显示

我将应用中的方向设置为横向 .

当我在IOS上启动我的应用程序时，启动画面以纵向显示，然后应用程序以横向显示 .

为什么启动画面以纵向而不是横向显示，如何修复？

在Android上，启动画面以横向显示 .

config.xml

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<widget id="com.ionicframework.someId" version="0.0.1" xmlns="http://www.w3.org/ns/widgets" xmlns:cdv="http://cordova.apache.org/ns/1.0">
    <name>Some Name</name>
    <description>Some Description</description>
    <author email="someEmail@gmail.com" href="http://someDomain.com/">Some Author</author>
    <content src="index.html"/>
    <access origin="*"/>
    <allow-navigation href="http://ionic.local/*"/>
    <allow-intent href="http://*/*"/>
    <allow-intent href="https://*/*"/>
    <allow-intent href="tel:*"/>
    <allow-intent href="sms:*"/>
    <allow-intent href="mailto:*"/>
    <allow-intent href="geo:*"/>
    <preference name="webviewbounce" value="false"/>
    <preference name="UIWebViewBounce" value="false"/>
    <preference name="DisallowOverscroll" value="true"/>
    <preference name="android-minSdkVersion" value="16"/>
    <preference name="BackupWebStorage" value="none"/>
    <preference name="SplashMaintainAspectRatio" value="true"/>
    <preference name="FadeSplashScreenDuration" value="300"/>
    <preference name="SplashShowOnlyFirstTime" value="false"/>
    <preference name="SplashScreen" value="screen"/>
    <preference name="SplashScreenDelay" value="3000"/>
    <preference name="ShowSplashScreenSpinner" value="false"/>
    <preference name="Orientation" value="landscape"/>
    <preference name="loadUrlTimeoutValue" value="700000"/>
    <platform name="android">
        <allow-intent href="market:*"/>
        <icon src="resources/android/icon/drawable-ldpi-icon.png" density="ldpi"/>
        <icon src="resources/android/icon/drawable-mdpi-icon.png" density="mdpi"/>
        <icon src="resources/android/icon/drawable-hdpi-icon.png" density="hdpi"/>
        <icon src="resources/android/icon/drawable-xhdpi-icon.png" density="xhdpi"/>
        <icon src="resources/android/icon/drawable-xxhdpi-icon.png" density="xxhdpi"/>
        <icon src="resources/android/icon/drawable-xxxhdpi-icon.png" density="xxxhdpi"/>
        <splash src="resources/android/splash/drawable-land-ldpi-screen.png" density="land-ldpi"/>
        <splash src="resources/android/splash/drawable-land-mdpi-screen.png" density="land-mdpi"/>
        <splash src="resources/android/splash/drawable-land-hdpi-screen.png" density="land-hdpi"/>
        <splash src="resources/android/splash/drawable-land-xhdpi-screen.png" density="land-xhdpi"/>
        <splash src="resources/android/splash/drawable-land-xxhdpi-screen.png" density="land-xxhdpi"/>
        <splash src="resources/android/splash/drawable-land-xxxhdpi-screen.png" density="land-xxxhdpi"/>
    </platform>
    <platform name="ios">
        <allow-intent href="itms:*"/>
        <allow-intent href="itms-apps:*"/>
        <icon src="resources/ios/icon/icon.png" width="57" height="57"/>
        <icon src="resources/ios/icon/icon@2x.png" width="114" height="114"/>
        <icon src="resources/ios/icon/icon-40.png" width="40" height="40"/>
        <icon src="resources/ios/icon/icon-40@2x.png" width="80" height="80"/>
        <icon src="resources/ios/icon/icon-40@3x.png" width="120" height="120"/>
        <icon src="resources/ios/icon/icon-50.png" width="50" height="50"/>
        <icon src="resources/ios/icon/icon-50@2x.png" width="100" height="100"/>
        <icon src="resources/ios/icon/icon-60.png" width="60" height="60"/>
        <icon src="resources/ios/icon/icon-60@2x.png" width="120" height="120"/>
        <icon src="resources/ios/icon/icon-60@3x.png" width="180" height="180"/>
        <icon src="resources/ios/icon/icon-72.png" width="72" height="72"/>
        <icon src="resources/ios/icon/icon-72@2x.png" width="144" height="144"/>
        <icon src="resources/ios/icon/icon-76.png" width="76" height="76"/>
        <icon src="resources/ios/icon/icon-76@2x.png" width="152" height="152"/>
        <icon src="resources/ios/icon/icon-83.5@2x.png" width="167" height="167"/>
        <icon src="resources/ios/icon/icon-small.png" width="29" height="29"/>
        <icon src="resources/ios/icon/icon-small@2x.png" width="58" height="58"/>
        <icon src="resources/ios/icon/icon-small@3x.png" width="87" height="87"/>
        <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="1536" src="resources/ios/splash/Default-Landscape@2x~ipad.png" width="2048" />
        <splash height="1242" src="resources/ios/splash/Default-Landscape-736h.png" width="2208" />
        <splash height="2048" src="resources/ios/splash/Default-Landscape@~ipadpro.png" width="2732" />
        <splash height="768" src="resources/ios/splash/Default-Landscape~ipad.png" width="1024" />
        <splash height="2048" src="resources/ios/splash/Default-Portrait@2x~ipad.png" width="1536" />
        <splash height="2732" src="resources/ios/splash/Default-Portrait@~ipadpro.png" width="2048" />
        <splash height="1024" src="resources/ios/splash/Default-Portrait~ipad.png" width="768" />
        <splash height="960" src="resources/ios/splash/Default@2x~iphone.png" width="640" />
        <splash height="480" src="resources/ios/splash/Default~iphone.png" width="320" />
    </platform>
    <platform name="wp8">
        <icon height="99" src="resources\wp8\icon\ApplicationIcon.png" width="99"/>
        <icon height="159" src="resources\wp8\icon\Background.png" width="159"/>
    </platform>
    <icon src="resources\android\icon\drawable-xhdpi-icon.png"/>
    <engine name="android" spec="^6.2.3"/>
    <engine name="ios" spec="^4.4.0"/>
    <plugin name="cordova-plugin-console" spec="1.0.5"/>
    <plugin name="cordova-plugin-device" spec="1.1.4"/>
    <plugin name="cordova-plugin-screen-orientation" spec="~2.0.1"/>
    <plugin name="cordova-plugin-splashscreen" spec="~4.0.1"/>
    <plugin name="cordova-plugin-statusbar" spec="2.2.1"/>
    <plugin name="cordova-plugin-whitelist" spec="1.3.1"/>
    <plugin name="ionic-plugin-keyboard" spec="~2.2.1"/>
    <plugin name="cordova-plugin-wkwebview-engine" spec="https://github.com/ionic-team/cordova-plugin-wkwebview-engine.git" />
</widget>

Ionic info:

global packages:

    @ionic/cli-utils : 1.5.0
    Cordova CLI      : 7.0.1
    Ionic CLI        : 3.5.0

local packages:

    @ionic/app-scripts              : 1.3.12
    @ionic/cli-plugin-cordova       : 1.4.1
    @ionic/cli-plugin-ionic-angular : 1.3.2
    Cordova Platforms               : android 6.2.3 ios 4.4.0
    Ionic Framework                 : ionic-angular 3.1.1

System:

    Node       : v6.9.5
    OS         : Windows 10
    Xcode      : not installed
    ios-deploy : not installed
    ios-sim    : not installed
    npm        : 3.10.10