iOS: set contentMode to ScaleAspectFit

Author: kuznetsov-online

ios/RCTSplashScreen/RCTSplashScreen/RCTSplashScreen.m

@@ -23,7 +23,8 @@ + (void)open:(RCTRootView *)v withImageNamed:(NSString *)imageName {
     UIImageView *view = [[UIImageView alloc]initWithFrame:[UIScreen mainScreen].bounds];
 
     view.image = [UIImage imageNamed:imageName];
-    
+    view.contentMode = UIViewContentModeScaleAspectFit;
+
     [[NSNotificationCenter defaultCenter] removeObserver:rootView  name:RCTContentDidAppearNotification object:rootView];
 
     [rootView setLoadingView:view];

ios/SplashScreenResource/LaunchScreen.xib

@@ -7,11 +7,11 @@
     <objects>
         <placeholder placeholderIdentifier="IBFilesOwner" id="-1" userLabel="File's Owner"/>
         <placeholder placeholderIdentifier="IBFirstResponder" id="-2" customClass="UIResponder"/>
-        <view contentMode="scaleToFill" id="iN0-l3-epB">
+        <view contentMode="scaleAspectFill" id="iN0-l3-epB">
             <rect key="frame" x="0.0" y="0.0" width="480" height="480"/>
             <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
             <subviews>
-                <imageView userInteractionEnabled="NO" contentMode="scaleToFill" horizontalHuggingPriority="251" verticalHuggingPriority="251" image="splash.png" translatesAutoresizingMaskIntoConstraints="NO" id="ZkI-RL-69Z">
+                <imageView userInteractionEnabled="NO" contentMode="scaleAspectFill" horizontalHuggingPriority="251" verticalHuggingPriority="251" image="splash.png" translatesAutoresizingMaskIntoConstraints="NO" id="ZkI-RL-69Z">
                     <rect key="frame" x="0.0" y="0.0" width="480" height="480"/>
                 </imageView>
             </subviews>