滚动视图中的多行可编辑文本和图像填充全部 space
Multiline editable text and image in a scrollview filling all space
我正试图在 iOS 上实现一些在 Android 上很容易做到的事情，那就是有一个正常的约束屏幕但是如果在某些时候视图比屏幕高，那么它的行为就像一个滚动视图：
这就是我想要的但是 iOS:
（android 实现只是在带有 fillViewport="true" 的 ScrollView 中使用 ConstraintLayout）
这是正常情况下的样子。底部视图被限制在底部，EditText（在 iOS 上我会使用 UITextView 因为我需要多行可编辑文本）在顶部。
当文本字段变大时，它只是垂直扩展。
您也可以正常滚动。
我在 iOS 上尝试了很多东西，将视图限制为内容布局指南 and/or 到框架布局指南，但没有任何东西能像这样工作。总是有一个奇怪的行为或者它甚至不滚动...
如果在 UITextView 上禁用滚动，其高度将自动调整为内容的高度——即使在输入内容时也是如此。
在正确设置约束的情况下，包含文本视图的滚动视图将根据嵌入的子视图的总高度自动启用/禁用滚动。
这是它在 Storyboard/Interface Builder 中的样子：
.systemTeal 视图是滚动视图。- 黄色背景视图是文本视图。
- 绿色背景视图只是另一种视图。
滚动视图被限制在顶部/前导/尾随 20 点，高度为 288。
文本视图和某些视图受限于滚动视图的内容布局指南，具有 12 磅“填充”。
这是 运行 时间的样子：
这里是情节提要的源代码，因此您可以检查并试用（无需 ViewController 代码）。只需新建一个项目，右键单击默认的Main.storyboard、select Open As -> Source Code，将整个xml源替换为以下内容：
<?xml version="1.0" encoding="UTF-8"?>
<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="17701" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES" initialViewController="End-pl-wnP">
<device id="retina4_7" orientation="portrait" appearance="light"/>
<dependencies>
<plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="17703"/>
<capability name="Safe area layout guides" minToolsVersion="9.0"/>
<capability name="System colors in document resources" minToolsVersion="11.0"/>
<capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
</dependencies>
<scenes>
<!--View Controller-->
<scene sceneID="GaN-aS-ajy">
<objects>
<viewController id="End-pl-wnP" sceneMemberID="viewController">
<view key="view" contentMode="scaleToFill" id="8Qt-g9-qT2">
<rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
<autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
<subviews>
<scrollView clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="scaleToFill" translatesAutoresizingMaskIntoConstraints="NO" id="eZS-Cx-qYs" userLabel="TealScrollView">
<rect key="frame" x="20" y="20" width="335" height="288"/>
<subviews>
<textView clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="scaleToFill" scrollEnabled="NO" text="This is the text view." textAlignment="natural" translatesAutoresizingMaskIntoConstraints="NO" id="7Se-XO-OPS" userLabel="YellowTextView">
<rect key="frame" x="12" y="12" width="311" height="45"/>
<color key="backgroundColor" red="0.99953407049999998" green="0.98835557699999999" blue="0.47265523669999998" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
<color key="textColor" systemColor="labelColor"/>
<fontDescription key="fontDescription" type="system" pointSize="24"/>
<textInputTraits key="textInputTraits" autocapitalizationType="sentences"/>
</textView>
<label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Some View" textAlignment="center" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="2Mx-yX-VZg" userLabel="GreenSomeView">
<rect key="frame" x="47.5" y="77" width="240" height="60"/>
<color key="backgroundColor" red="0.45009386540000001" green="0.98132258650000004" blue="0.4743030667" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
<constraints>
<constraint firstAttribute="width" constant="240" id="AqV-is-i0i"/>
<constraint firstAttribute="height" constant="60" id="fff-dn-2i5"/>
</constraints>
<fontDescription key="fontDescription" type="system" pointSize="30"/>
<nil key="textColor"/>
<nil key="highlightedColor"/>
</label>
</subviews>
<color key="backgroundColor" systemColor="systemTealColor"/>
<constraints>
<constraint firstItem="2Mx-yX-VZg" firstAttribute="centerX" secondItem="7Se-XO-OPS" secondAttribute="centerX" id="45Q-oe-nAR"/>
<constraint firstItem="2Mx-yX-VZg" firstAttribute="bottom" secondItem="eBA-LY-1GE" secondAttribute="bottom" constant="-12" id="4NU-Uv-m9I"/>
<constraint firstItem="7Se-XO-OPS" firstAttribute="leading" secondItem="eBA-LY-1GE" secondAttribute="leading" constant="12" id="BYn-bQ-6KV"/>
<constraint firstItem="2Mx-yX-VZg" firstAttribute="top" secondItem="7Se-XO-OPS" secondAttribute="bottom" constant="20" id="Hzr-4N-5Ql"/>
<constraint firstAttribute="height" constant="288" id="U0g-vv-Ze5"/>
<constraint firstItem="7Se-XO-OPS" firstAttribute="width" secondItem="QZA-CN-WnC" secondAttribute="width" constant="-24" id="VPa-39-0aV"/>
<constraint firstItem="7Se-XO-OPS" firstAttribute="trailing" secondItem="eBA-LY-1GE" secondAttribute="trailing" constant="12" id="ZVh-Fb-ig9"/>
<constraint firstItem="7Se-XO-OPS" firstAttribute="top" secondItem="eBA-LY-1GE" secondAttribute="top" constant="12" id="kWx-ff-DeQ"/>
</constraints>
<viewLayoutGuide key="contentLayoutGuide" id="eBA-LY-1GE"/>
<viewLayoutGuide key="frameLayoutGuide" id="QZA-CN-WnC"/>
</scrollView>
</subviews>
<viewLayoutGuide key="safeArea" id="NOq-jz-yuG"/>
<color key="backgroundColor" systemColor="systemBackgroundColor"/>
<constraints>
<constraint firstItem="eZS-Cx-qYs" firstAttribute="top" secondItem="NOq-jz-yuG" secondAttribute="top" constant="20" id="Oh5-z6-HeB"/>
<constraint firstItem="eZS-Cx-qYs" firstAttribute="leading" secondItem="NOq-jz-yuG" secondAttribute="leading" constant="20" id="ZeN-Gb-OvE"/>
<constraint firstItem="NOq-jz-yuG" firstAttribute="trailing" secondItem="eZS-Cx-qYs" secondAttribute="trailing" constant="20" id="bxt-As-NfZ"/>
</constraints>
</view>
</viewController>
<placeholder placeholderIdentifier="IBFirstResponder" id="waK-s5-f38" userLabel="First Responder" customClass="UIResponder" sceneMemberID="firstResponder"/>
</objects>
<point key="canvasLocation" x="341" y="155"/>
</scene>
</scenes>
<resources>
<systemColor name="labelColor">
<color white="0.0" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
</systemColor>
<systemColor name="systemBackgroundColor">
<color white="1" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
</systemColor>
<systemColor name="systemTealColor">
<color red="0.35294117647058826" green="0.78431372549019607" blue="0.98039215686274506" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
</systemColor>
</resources>
</document>
编辑 - 评论后...
如果您希望“其他视图”固定在底部直到它需要滚动:
- 在“holder”视图中嵌入文本视图和其他视图
- 将持有者视图限制在内容布局指南中
- 从文本视图底部限制“某些视图”顶部 >= 20
- 将持有人视图高度限制为框架布局指南高度（减去一些顶部和底部“填充”）
- 给出高度限制
Priority: 250 (Default Low)
外观如下：
这是修改后的情节提要来源：
<?xml version="1.0" encoding="UTF-8"?>
<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="17701" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES" initialViewController="End-pl-wnP">
<device id="retina4_7" orientation="portrait" appearance="light"/>
<dependencies>
<plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="17703"/>
<capability name="Safe area layout guides" minToolsVersion="9.0"/>
<capability name="System colors in document resources" minToolsVersion="11.0"/>
<capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
</dependencies>
<scenes>
<!--View Controller-->
<scene sceneID="GaN-aS-ajy">
<objects>
<viewController id="End-pl-wnP" sceneMemberID="viewController">
<view key="view" contentMode="scaleToFill" id="8Qt-g9-qT2">
<rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
<autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
<subviews>
<scrollView clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="scaleToFill" translatesAutoresizingMaskIntoConstraints="NO" id="eZS-Cx-qYs" userLabel="TealScrollView">
<rect key="frame" x="20" y="20" width="335" height="288"/>
<subviews>
<view contentMode="scaleToFill" translatesAutoresizingMaskIntoConstraints="NO" id="TZH-n0-mbL" userLabel="OrangeHolderView">
<rect key="frame" x="12" y="12" width="311" height="264"/>
<subviews>
<textView clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="scaleToFill" scrollEnabled="NO" text="This is the text view." textAlignment="natural" translatesAutoresizingMaskIntoConstraints="NO" id="7Se-XO-OPS" userLabel="YellowTextView">
<rect key="frame" x="0.0" y="0.0" width="311" height="45"/>
<color key="backgroundColor" red="0.99953407049999998" green="0.98835557699999999" blue="0.47265523669999998" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
<color key="textColor" systemColor="labelColor"/>
<fontDescription key="fontDescription" type="system" pointSize="24"/>
<textInputTraits key="textInputTraits" autocapitalizationType="sentences"/>
</textView>
<label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Some View" textAlignment="center" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="2Mx-yX-VZg" userLabel="GreenSomeView">
<rect key="frame" x="35.5" y="204" width="240" height="60"/>
<color key="backgroundColor" red="0.45009386540000001" green="0.98132258650000004" blue="0.4743030667" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
<constraints>
<constraint firstAttribute="width" constant="240" id="AqV-is-i0i"/>
<constraint firstAttribute="height" constant="60" id="fff-dn-2i5"/>
</constraints>
<fontDescription key="fontDescription" type="system" pointSize="30"/>
<nil key="textColor"/>
<nil key="highlightedColor"/>
</label>
</subviews>
<color key="backgroundColor" systemColor="systemOrangeColor"/>
<constraints>
<constraint firstItem="7Se-XO-OPS" firstAttribute="leading" secondItem="TZH-n0-mbL" secondAttribute="leading" id="2Qh-gf-Aqd"/>
<constraint firstItem="7Se-XO-OPS" firstAttribute="top" secondItem="TZH-n0-mbL" secondAttribute="top" id="34Q-R4-aJ7"/>
<constraint firstItem="2Mx-yX-VZg" firstAttribute="centerX" secondItem="7Se-XO-OPS" secondAttribute="centerX" id="Leg-dA-7qH"/>
<constraint firstAttribute="bottom" secondItem="2Mx-yX-VZg" secondAttribute="bottom" id="RxT-uL-vKL"/>
<constraint firstAttribute="trailing" secondItem="7Se-XO-OPS" secondAttribute="trailing" id="UFn-D6-4fs"/>
<constraint firstItem="2Mx-yX-VZg" firstAttribute="top" relation="greaterThanOrEqual" secondItem="7Se-XO-OPS" secondAttribute="bottom" constant="20" id="Vfv-7A-o9l"/>
</constraints>
</view>
</subviews>
<color key="backgroundColor" systemColor="systemTealColor"/>
<constraints>
<constraint firstItem="TZH-n0-mbL" firstAttribute="width" secondItem="QZA-CN-WnC" secondAttribute="width" constant="-24" id="F0n-tQ-VZs"/>
<constraint firstItem="TZH-n0-mbL" firstAttribute="trailing" secondItem="eBA-LY-1GE" secondAttribute="trailing" constant="-12" id="Qzd-kt-eRV"/>
<constraint firstAttribute="height" constant="288" id="U0g-vv-Ze5"/>
<constraint firstItem="TZH-n0-mbL" firstAttribute="leading" secondItem="eBA-LY-1GE" secondAttribute="leading" constant="12" id="Xcd-EH-rvM"/>
<constraint firstItem="TZH-n0-mbL" firstAttribute="height" secondItem="QZA-CN-WnC" secondAttribute="height" priority="250" constant="-24" id="eWO-d1-VMo"/>
<constraint firstItem="TZH-n0-mbL" firstAttribute="top" secondItem="eBA-LY-1GE" secondAttribute="top" constant="12" id="jg5-71-Hyn"/>
<constraint firstItem="TZH-n0-mbL" firstAttribute="bottom" secondItem="eBA-LY-1GE" secondAttribute="bottom" constant="-12" id="yc1-tC-Xsw"/>
</constraints>
<viewLayoutGuide key="contentLayoutGuide" id="eBA-LY-1GE"/>
<viewLayoutGuide key="frameLayoutGuide" id="QZA-CN-WnC"/>
</scrollView>
</subviews>
<viewLayoutGuide key="safeArea" id="NOq-jz-yuG"/>
<color key="backgroundColor" systemColor="systemBackgroundColor"/>
<constraints>
<constraint firstItem="eZS-Cx-qYs" firstAttribute="top" secondItem="NOq-jz-yuG" secondAttribute="top" constant="20" id="Oh5-z6-HeB"/>
<constraint firstItem="eZS-Cx-qYs" firstAttribute="leading" secondItem="NOq-jz-yuG" secondAttribute="leading" constant="20" id="ZeN-Gb-OvE"/>
<constraint firstItem="NOq-jz-yuG" firstAttribute="trailing" secondItem="eZS-Cx-qYs" secondAttribute="trailing" constant="20" id="bxt-As-NfZ"/>
</constraints>
</view>
</viewController>
<placeholder placeholderIdentifier="IBFirstResponder" id="waK-s5-f38" userLabel="First Responder" customClass="UIResponder" sceneMemberID="firstResponder"/>
</objects>
<point key="canvasLocation" x="341" y="155"/>
</scene>
</scenes>
<resources>
<systemColor name="labelColor">
<color white="0.0" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
</systemColor>
<systemColor name="systemBackgroundColor">
<color white="1" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
</systemColor>
<systemColor name="systemOrangeColor">
<color red="1" green="0.58431372549019611" blue="0.0" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
</systemColor>
<systemColor name="systemTealColor">
<color red="0.35294117647058826" green="0.78431372549019607" blue="0.98039215686274506" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
</systemColor>
</resources>
</document>
我正试图在 iOS 上实现一些在 Android 上很容易做到的事情，那就是有一个正常的约束屏幕但是如果在某些时候视图比屏幕高，那么它的行为就像一个滚动视图：
这就是我想要的但是 iOS:
（android 实现只是在带有 fillViewport="true" 的 ScrollView 中使用 ConstraintLayout）
这是正常情况下的样子。底部视图被限制在底部，EditText（在 iOS 上我会使用 UITextView 因为我需要多行可编辑文本）在顶部。
当文本字段变大时，它只是垂直扩展。
您也可以正常滚动。
我在 iOS 上尝试了很多东西，将视图限制为内容布局指南 and/or 到框架布局指南，但没有任何东西能像这样工作。总是有一个奇怪的行为或者它甚至不滚动...
如果在 UITextView 上禁用滚动，其高度将自动调整为内容的高度——即使在输入内容时也是如此。
在正确设置约束的情况下，包含文本视图的滚动视图将根据嵌入的子视图的总高度自动启用/禁用滚动。
这是它在 Storyboard/Interface Builder 中的样子：
.systemTeal视图是滚动视图。- 黄色背景视图是文本视图。
- 绿色背景视图只是另一种视图。
滚动视图被限制在顶部/前导/尾随 20 点，高度为 288。
文本视图和某些视图受限于滚动视图的内容布局指南，具有 12 磅“填充”。
这是 运行 时间的样子：
这里是情节提要的源代码，因此您可以检查并试用（无需 ViewController 代码）。只需新建一个项目，右键单击默认的Main.storyboard、select Open As -> Source Code，将整个xml源替换为以下内容：
<?xml version="1.0" encoding="UTF-8"?>
<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="17701" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES" initialViewController="End-pl-wnP">
<device id="retina4_7" orientation="portrait" appearance="light"/>
<dependencies>
<plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="17703"/>
<capability name="Safe area layout guides" minToolsVersion="9.0"/>
<capability name="System colors in document resources" minToolsVersion="11.0"/>
<capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
</dependencies>
<scenes>
<!--View Controller-->
<scene sceneID="GaN-aS-ajy">
<objects>
<viewController id="End-pl-wnP" sceneMemberID="viewController">
<view key="view" contentMode="scaleToFill" id="8Qt-g9-qT2">
<rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
<autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
<subviews>
<scrollView clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="scaleToFill" translatesAutoresizingMaskIntoConstraints="NO" id="eZS-Cx-qYs" userLabel="TealScrollView">
<rect key="frame" x="20" y="20" width="335" height="288"/>
<subviews>
<textView clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="scaleToFill" scrollEnabled="NO" text="This is the text view." textAlignment="natural" translatesAutoresizingMaskIntoConstraints="NO" id="7Se-XO-OPS" userLabel="YellowTextView">
<rect key="frame" x="12" y="12" width="311" height="45"/>
<color key="backgroundColor" red="0.99953407049999998" green="0.98835557699999999" blue="0.47265523669999998" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
<color key="textColor" systemColor="labelColor"/>
<fontDescription key="fontDescription" type="system" pointSize="24"/>
<textInputTraits key="textInputTraits" autocapitalizationType="sentences"/>
</textView>
<label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Some View" textAlignment="center" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="2Mx-yX-VZg" userLabel="GreenSomeView">
<rect key="frame" x="47.5" y="77" width="240" height="60"/>
<color key="backgroundColor" red="0.45009386540000001" green="0.98132258650000004" blue="0.4743030667" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
<constraints>
<constraint firstAttribute="width" constant="240" id="AqV-is-i0i"/>
<constraint firstAttribute="height" constant="60" id="fff-dn-2i5"/>
</constraints>
<fontDescription key="fontDescription" type="system" pointSize="30"/>
<nil key="textColor"/>
<nil key="highlightedColor"/>
</label>
</subviews>
<color key="backgroundColor" systemColor="systemTealColor"/>
<constraints>
<constraint firstItem="2Mx-yX-VZg" firstAttribute="centerX" secondItem="7Se-XO-OPS" secondAttribute="centerX" id="45Q-oe-nAR"/>
<constraint firstItem="2Mx-yX-VZg" firstAttribute="bottom" secondItem="eBA-LY-1GE" secondAttribute="bottom" constant="-12" id="4NU-Uv-m9I"/>
<constraint firstItem="7Se-XO-OPS" firstAttribute="leading" secondItem="eBA-LY-1GE" secondAttribute="leading" constant="12" id="BYn-bQ-6KV"/>
<constraint firstItem="2Mx-yX-VZg" firstAttribute="top" secondItem="7Se-XO-OPS" secondAttribute="bottom" constant="20" id="Hzr-4N-5Ql"/>
<constraint firstAttribute="height" constant="288" id="U0g-vv-Ze5"/>
<constraint firstItem="7Se-XO-OPS" firstAttribute="width" secondItem="QZA-CN-WnC" secondAttribute="width" constant="-24" id="VPa-39-0aV"/>
<constraint firstItem="7Se-XO-OPS" firstAttribute="trailing" secondItem="eBA-LY-1GE" secondAttribute="trailing" constant="12" id="ZVh-Fb-ig9"/>
<constraint firstItem="7Se-XO-OPS" firstAttribute="top" secondItem="eBA-LY-1GE" secondAttribute="top" constant="12" id="kWx-ff-DeQ"/>
</constraints>
<viewLayoutGuide key="contentLayoutGuide" id="eBA-LY-1GE"/>
<viewLayoutGuide key="frameLayoutGuide" id="QZA-CN-WnC"/>
</scrollView>
</subviews>
<viewLayoutGuide key="safeArea" id="NOq-jz-yuG"/>
<color key="backgroundColor" systemColor="systemBackgroundColor"/>
<constraints>
<constraint firstItem="eZS-Cx-qYs" firstAttribute="top" secondItem="NOq-jz-yuG" secondAttribute="top" constant="20" id="Oh5-z6-HeB"/>
<constraint firstItem="eZS-Cx-qYs" firstAttribute="leading" secondItem="NOq-jz-yuG" secondAttribute="leading" constant="20" id="ZeN-Gb-OvE"/>
<constraint firstItem="NOq-jz-yuG" firstAttribute="trailing" secondItem="eZS-Cx-qYs" secondAttribute="trailing" constant="20" id="bxt-As-NfZ"/>
</constraints>
</view>
</viewController>
<placeholder placeholderIdentifier="IBFirstResponder" id="waK-s5-f38" userLabel="First Responder" customClass="UIResponder" sceneMemberID="firstResponder"/>
</objects>
<point key="canvasLocation" x="341" y="155"/>
</scene>
</scenes>
<resources>
<systemColor name="labelColor">
<color white="0.0" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
</systemColor>
<systemColor name="systemBackgroundColor">
<color white="1" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
</systemColor>
<systemColor name="systemTealColor">
<color red="0.35294117647058826" green="0.78431372549019607" blue="0.98039215686274506" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
</systemColor>
</resources>
</document>
编辑 - 评论后...
如果您希望“其他视图”固定在底部直到它需要滚动:
- 在“holder”视图中嵌入文本视图和其他视图
- 将持有者视图限制在内容布局指南中
- 从文本视图底部限制“某些视图”顶部 >= 20
- 将持有人视图高度限制为框架布局指南高度（减去一些顶部和底部“填充”）
- 给出高度限制
Priority: 250 (Default Low)
外观如下：
这是修改后的情节提要来源：
<?xml version="1.0" encoding="UTF-8"?>
<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="17701" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES" initialViewController="End-pl-wnP">
<device id="retina4_7" orientation="portrait" appearance="light"/>
<dependencies>
<plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="17703"/>
<capability name="Safe area layout guides" minToolsVersion="9.0"/>
<capability name="System colors in document resources" minToolsVersion="11.0"/>
<capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
</dependencies>
<scenes>
<!--View Controller-->
<scene sceneID="GaN-aS-ajy">
<objects>
<viewController id="End-pl-wnP" sceneMemberID="viewController">
<view key="view" contentMode="scaleToFill" id="8Qt-g9-qT2">
<rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
<autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
<subviews>
<scrollView clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="scaleToFill" translatesAutoresizingMaskIntoConstraints="NO" id="eZS-Cx-qYs" userLabel="TealScrollView">
<rect key="frame" x="20" y="20" width="335" height="288"/>
<subviews>
<view contentMode="scaleToFill" translatesAutoresizingMaskIntoConstraints="NO" id="TZH-n0-mbL" userLabel="OrangeHolderView">
<rect key="frame" x="12" y="12" width="311" height="264"/>
<subviews>
<textView clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="scaleToFill" scrollEnabled="NO" text="This is the text view." textAlignment="natural" translatesAutoresizingMaskIntoConstraints="NO" id="7Se-XO-OPS" userLabel="YellowTextView">
<rect key="frame" x="0.0" y="0.0" width="311" height="45"/>
<color key="backgroundColor" red="0.99953407049999998" green="0.98835557699999999" blue="0.47265523669999998" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
<color key="textColor" systemColor="labelColor"/>
<fontDescription key="fontDescription" type="system" pointSize="24"/>
<textInputTraits key="textInputTraits" autocapitalizationType="sentences"/>
</textView>
<label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Some View" textAlignment="center" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="2Mx-yX-VZg" userLabel="GreenSomeView">
<rect key="frame" x="35.5" y="204" width="240" height="60"/>
<color key="backgroundColor" red="0.45009386540000001" green="0.98132258650000004" blue="0.4743030667" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
<constraints>
<constraint firstAttribute="width" constant="240" id="AqV-is-i0i"/>
<constraint firstAttribute="height" constant="60" id="fff-dn-2i5"/>
</constraints>
<fontDescription key="fontDescription" type="system" pointSize="30"/>
<nil key="textColor"/>
<nil key="highlightedColor"/>
</label>
</subviews>
<color key="backgroundColor" systemColor="systemOrangeColor"/>
<constraints>
<constraint firstItem="7Se-XO-OPS" firstAttribute="leading" secondItem="TZH-n0-mbL" secondAttribute="leading" id="2Qh-gf-Aqd"/>
<constraint firstItem="7Se-XO-OPS" firstAttribute="top" secondItem="TZH-n0-mbL" secondAttribute="top" id="34Q-R4-aJ7"/>
<constraint firstItem="2Mx-yX-VZg" firstAttribute="centerX" secondItem="7Se-XO-OPS" secondAttribute="centerX" id="Leg-dA-7qH"/>
<constraint firstAttribute="bottom" secondItem="2Mx-yX-VZg" secondAttribute="bottom" id="RxT-uL-vKL"/>
<constraint firstAttribute="trailing" secondItem="7Se-XO-OPS" secondAttribute="trailing" id="UFn-D6-4fs"/>
<constraint firstItem="2Mx-yX-VZg" firstAttribute="top" relation="greaterThanOrEqual" secondItem="7Se-XO-OPS" secondAttribute="bottom" constant="20" id="Vfv-7A-o9l"/>
</constraints>
</view>
</subviews>
<color key="backgroundColor" systemColor="systemTealColor"/>
<constraints>
<constraint firstItem="TZH-n0-mbL" firstAttribute="width" secondItem="QZA-CN-WnC" secondAttribute="width" constant="-24" id="F0n-tQ-VZs"/>
<constraint firstItem="TZH-n0-mbL" firstAttribute="trailing" secondItem="eBA-LY-1GE" secondAttribute="trailing" constant="-12" id="Qzd-kt-eRV"/>
<constraint firstAttribute="height" constant="288" id="U0g-vv-Ze5"/>
<constraint firstItem="TZH-n0-mbL" firstAttribute="leading" secondItem="eBA-LY-1GE" secondAttribute="leading" constant="12" id="Xcd-EH-rvM"/>
<constraint firstItem="TZH-n0-mbL" firstAttribute="height" secondItem="QZA-CN-WnC" secondAttribute="height" priority="250" constant="-24" id="eWO-d1-VMo"/>
<constraint firstItem="TZH-n0-mbL" firstAttribute="top" secondItem="eBA-LY-1GE" secondAttribute="top" constant="12" id="jg5-71-Hyn"/>
<constraint firstItem="TZH-n0-mbL" firstAttribute="bottom" secondItem="eBA-LY-1GE" secondAttribute="bottom" constant="-12" id="yc1-tC-Xsw"/>
</constraints>
<viewLayoutGuide key="contentLayoutGuide" id="eBA-LY-1GE"/>
<viewLayoutGuide key="frameLayoutGuide" id="QZA-CN-WnC"/>
</scrollView>
</subviews>
<viewLayoutGuide key="safeArea" id="NOq-jz-yuG"/>
<color key="backgroundColor" systemColor="systemBackgroundColor"/>
<constraints>
<constraint firstItem="eZS-Cx-qYs" firstAttribute="top" secondItem="NOq-jz-yuG" secondAttribute="top" constant="20" id="Oh5-z6-HeB"/>
<constraint firstItem="eZS-Cx-qYs" firstAttribute="leading" secondItem="NOq-jz-yuG" secondAttribute="leading" constant="20" id="ZeN-Gb-OvE"/>
<constraint firstItem="NOq-jz-yuG" firstAttribute="trailing" secondItem="eZS-Cx-qYs" secondAttribute="trailing" constant="20" id="bxt-As-NfZ"/>
</constraints>
</view>
</viewController>
<placeholder placeholderIdentifier="IBFirstResponder" id="waK-s5-f38" userLabel="First Responder" customClass="UIResponder" sceneMemberID="firstResponder"/>
</objects>
<point key="canvasLocation" x="341" y="155"/>
</scene>
</scenes>
<resources>
<systemColor name="labelColor">
<color white="0.0" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
</systemColor>
<systemColor name="systemBackgroundColor">
<color white="1" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
</systemColor>
<systemColor name="systemOrangeColor">
<color red="1" green="0.58431372549019611" blue="0.0" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
</systemColor>
<systemColor name="systemTealColor">
<color red="0.35294117647058826" green="0.78431372549019607" blue="0.98039215686274506" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
</systemColor>
</resources>
</document>