不能全屏后，也尝试了其他设置，比如xcode右侧View的Content Mode的各种模式充满不充满，靠上靠下，xcode也能显示我设置的变化，可是到android studio运行后的ios模拟器，没有任何变化，一直都是那样的显示。是哪里没有做到吗？

ios/Runner/Base.lproj/LaunchScreen.storyboard

<?xml version="1.0" encoding="UTF-8"?>
<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="23504" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" launchScreen="YES" colorMatched="YES" initialViewController="01J-lp-oVM">
    <device id="retina6_5" orientation="portrait" appearance="light"/>
    <dependencies>
        <deployment identifier="iOS"/>
        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="23506"/>
        <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
    </dependencies>
    <scenes>
        <!--View Controller-->
        <scene sceneID="EHf-IW-A2E">
            <objects>
                <viewController id="01J-lp-oVM" sceneMemberID="viewController">
                    <layoutGuides>
                        <viewControllerLayoutGuide type="top" id="Ydg-fD-yQy"/>
                        <viewControllerLayoutGuide type="bottom" id="xbc-2k-c8Z"/>
                    </layoutGuides>
                    <view key="view" contentMode="scaleToFill" id="Ze5-6b-2t3">
                        <rect key="frame" x="0.0" y="0.0" width="414" height="896"/>
                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
                        <subviews>
                            <imageView opaque="NO" clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="scaleAspectFit" misplaced="YES" image="LaunchImage" translatesAutoresizingMaskIntoConstraints="NO" id="noM-Bc-0yW">
                                <rect key="frame" x="0.0" y="-244" width="440" height="1439"/>
                            </imageView>
                        </subviews>
                        <color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
                        <constraints>
                            <constraint firstItem="noM-Bc-0yW" firstAttribute="centerY" secondItem="Ze5-6b-2t3" secondAttribute="centerY" id="1CD-vO-gHn"/>
                            <constraint firstItem="noM-Bc-0yW" firstAttribute="height" secondItem="Ze5-6b-2t3" secondAttribute="height" multiplier="0.937238" id="Hc5-F7-wDN"/>
                            <constraint firstItem="noM-Bc-0yW" firstAttribute="centerX" secondItem="Ze5-6b-2t3" secondAttribute="centerX" id="pDk-OR-WOx"/>
                            <constraint firstItem="noM-Bc-0yW" firstAttribute="width" secondItem="Ze5-6b-2t3" secondAttribute="width" multiplier="0.940909" id="wVf-BS-Rbh"/>
                        </constraints>
                    </view>
                </viewController>
                <placeholder placeholderIdentifier="IBFirstResponder" id="iYj-Kq-Ea1" userLabel="First Responder" sceneMemberID="firstResponder"/>
            </objects>
            <point key="canvasLocation" x="80.454545454545453" y="263.59832635983264"/>
        </scene>
    </scenes>
    <resources>
        <image name="LaunchImage" width="414" height="896"/>
    </resources>
</document>