Clips from my post on web vs. native

Storyboard Fragment

<view key="view" contentMode="scaleToFill" id="SHh-SP-yVu">
    <rect key="frame" x="0.0" y="0.0" width="320" height="568"/>
    <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMaxY="YES"/>
    <subviews>
        <mapView mapType="standard" showsUserLocation="YES" showsBuildings="NO" id="UIZ-1B-l3e">
            <rect key="frame" x="0.0" y="0.0" width="320" height="568"/>
        </mapView>
        <button opaque="NO" contentMode="scaleAspectFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="233-h5-Yuj">
            <rect key="frame" x="10" y="30" width="40" height="40"/>
            <constraints>
                <constraint firstAttribute="width" constant="40" id="819-1Q-k2P"/>
                <constraint firstAttribute="height" constant="40" id="Nwc-d8-Aed"/>
            </constraints>
        </button>
        <view clipsSubviews="YES" contentMode="scaleToFill" id="oS1-FG-K1g">
            <rect key="frame" x="0.0" y="414" width="320" height="100"/>
            <subviews>
                <toolbar hidden="YES" opaque="NO" clearsContextBeforeDrawing="NO" contentMode="scaleToFill" translatesAutoresizingMaskIntoConstraints="NO" id="132-KC-MzF">
                    <rect key="frame" x="0.0" y="0.0" width="320" height="100"/>
                    <items/>
                </toolbar>
                <collectionView opaque="NO" multipleTouchEnabled="YES" contentMode="scaleToFill" alwaysBounceHorizontal="YES" showsHorizontalScrollIndicator="NO" showsVerticalScrollIndicator="NO" minimumZoomScale="0.0" maximumZoomScale="0.0" dataMode="prototypes" translatesAutoresizingMaskIntoConstraints="NO" id="XrZ-bO-LgQ" customClass="BTNProductPickerView">
                    <rect key="frame" x="0.0" y="0.0" width="320" height="100"/>
                    <color key="backgroundColor" white="0.0" alpha="0.0" colorSpace="calibratedWhite"/>
                    <collectionViewLayout key="collectionViewLayout" id="8m2-5S-iTN" customClass="UBRProductFlowLayout"/>
                    <cells/>
                </collectionView>
            </subviews>
        </view>
    </subviews>
</view>