Ios 在UIScrollView中自动调整UITextView的大小

我正在设置一个滚动视图来显示一些内容。我试图找出如何根据文本视图中的文本量更改滚动视图的大小（当然还要更改文本视图的高度，但保持宽度不变）。我使用了一个故事板的滚动视图。视图控制器内部是滚动视图，其中包含一个容器视图（这是保存文本视图的地方）。我所说的文本视图是在内容描述下面。我尝试了很多不同的方法，但没有找到一种有效的方法。任何帮助都将不胜感激。谢谢（还值得注意的是，我正在使用DeckTransition库演示此视图控制器）

我的Xcode故事板

---

它目前在模拟器中的外观如何

如果将

scrollEnabled

设置为false，文本视图将适合其内容。如果它不起作用，您应该检查您的约束。e、 g.内容拥抱优先，抗压优先。确保文本视图缩小到小于固有内容大小。

以下是一个基本示例。点击“更改文本”按钮将在文本视图中的短文本、中文本和长文本之间切换，产生以下结果：

以下是所需的所有代码（它所做的只是更改文本-其他什么都没有）：

下面是故事板：

<?xml version="1.0" encoding="UTF-8"?>
<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="14460.31" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES" initialViewController="HAr-gQ-Ow4">
    <device id="retina4_7" orientation="portrait">
        <adaptation id="fullscreen"/>
    </device>
    <dependencies>
        <deployment identifier="iOS"/>
        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="14460.20"/>
        <capability name="Safe area layout guides" minToolsVersion="9.0"/>
        <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
    </dependencies>
    <scenes>
        <!--Text Viewin Scroll View Controller-->
        <scene sceneID="0zs-mA-Zcw">
            <objects>
                <viewController id="HAr-gQ-Ow4" customClass="TextViewinScrollViewController" customModule="XC10SWScratch" customModuleProvider="target" sceneMemberID="viewController">
                    <view key="view" contentMode="scaleToFill" id="oNR-og-qiK">
                        <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="XBn-Je-V51">
                                <rect key="frame" x="40" y="60" width="295" height="567"/>
                                <subviews>
                                    <view contentMode="scaleToFill" translatesAutoresizingMaskIntoConstraints="NO" id="oNQ-i1-b49" userLabel="Container">
                                        <rect key="frame" x="0.0" y="0.0" width="295" height="675.5"/>
                                        <subviews>
                                            <imageView userInteractionEnabled="NO" contentMode="scaleToFill" horizontalHuggingPriority="251" verticalHuggingPriority="251" translatesAutoresizingMaskIntoConstraints="NO" id="VAf-T0-cKT">
                                                <rect key="frame" x="0.0" y="0.0" width="295" height="240"/>
                                                <color key="backgroundColor" white="0.0" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
                                                <constraints>
                                                    <constraint firstAttribute="height" constant="240" id="NzL-9L-Ybs"/>
                                                </constraints>
                                            </imageView>
                                            <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="K3u-yi-BbX">
                                                <rect key="frame" x="51.5" y="252" width="192" height="26"/>
                                                <color key="backgroundColor" red="0.92143100499999997" green="0.92145264149999995" blue="0.92144101860000005" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
                                                <inset key="contentEdgeInsets" minX="10" minY="4" maxX="10" maxY="4"/>
                                                <state key="normal" title="Change Text in Text View"/>
                                                <connections>
                                                    <action selector="didTap:" destination="HAr-gQ-Ow4" eventType="touchUpInside" id="dnw-ff-qw3"/>
                                                </connections>
                                            </button>
                                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Content Description" textAlignment="center" lineBreakMode="tailTruncation" numberOfLines="0" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="gXD-0q-Avm">
                                                <rect key="frame" x="8" y="290" width="153.5" height="20.5"/>
                                                <color key="backgroundColor" red="0.92143100499999997" green="0.92145264149999995" blue="0.92144101860000005" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
                                                <fontDescription key="fontDescription" type="system" pointSize="17"/>
                                                <nil key="textColor"/>
                                                <nil key="highlightedColor"/>
                                            </label>
                                            <textView clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="scaleToFill" scrollEnabled="NO" editable="NO" text="This is the Text View" textAlignment="natural" translatesAutoresizingMaskIntoConstraints="NO" id="Mwg-70-9L2">
                                                <rect key="frame" x="20" y="322.5" width="255" height="33"/>
                                                <color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
                                                <fontDescription key="fontDescription" type="system" pointSize="14"/>
                                                <textInputTraits key="textInputTraits" autocapitalizationType="sentences"/>
                                            </textView>
                                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" textAlignment="center" lineBreakMode="tailTruncation" numberOfLines="0" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="1ox-xZ-Teo" userLabel="Example View">
                                                <rect key="frame" x="20" y="367.5" width="255" height="300"/>
                                                <color key="backgroundColor" red="0.92143100499999997" green="0.92145264149999995" blue="0.92144101860000005" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
                                                <constraints>
                                                    <constraint firstAttribute="height" constant="300" id="hXk-ck-CvF"/>
                                                </constraints>
                                                <string key="text">Example View
(300-pts Height)</string>
                                                <fontDescription key="fontDescription" type="system" pointSize="17"/>
                                                <nil key="textColor"/>
                                                <nil key="highlightedColor"/>
                                            </label>
                                        </subviews>
                                        <color key="backgroundColor" red="1" green="0.83234566450000003" blue="0.47320586440000001" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
                                        <constraints>
                                            <constraint firstItem="gXD-0q-Avm" firstAttribute="top" secondItem="K3u-yi-BbX" secondAttribute="bottom" constant="12" id="7gX-pC-zmh"/>
                                            <constraint firstItem="Mwg-70-9L2" firstAttribute="width" secondItem="oNQ-i1-b49" secondAttribute="width" constant="-40" id="9pZ-ja-g7R"/>
                                            <constraint firstItem="Mwg-70-9L2" firstAttribute="centerX" secondItem="oNQ-i1-b49" secondAttribute="centerX" id="Byo-5N-WXf"/>
                                            <constraint firstAttribute="trailing" secondItem="VAf-T0-cKT" secondAttribute="trailing" id="FyF-by-edM"/>
                                            <constraint firstItem="1ox-xZ-Teo" firstAttribute="width" secondItem="Mwg-70-9L2" secondAttribute="width" id="Lic-3Q-vWZ"/>
                                            <constraint firstAttribute="bottom" secondItem="1ox-xZ-Teo" secondAttribute="bottom" constant="8" id="MQK-MS-dCA"/>
                                            <constraint firstItem="K3u-yi-BbX" firstAttribute="centerX" secondItem="oNQ-i1-b49" secondAttribute="centerX" id="UPN-FD-gxb"/>
                                            <constraint firstItem="K3u-yi-BbX" firstAttribute="top" secondItem="VAf-T0-cKT" secondAttribute="bottom" constant="12" id="WMi-Vl-xBu"/>
                                            <constraint firstItem="1ox-xZ-Teo" firstAttribute="centerX" secondItem="oNQ-i1-b49" secondAttribute="centerX" id="dno-nR-zvQ"/>
                                            <constraint firstItem="Mwg-70-9L2" firstAttribute="top" secondItem="gXD-0q-Avm" secondAttribute="bottom" constant="12" id="fDe-GP-gs4"/>
                                            <constraint firstItem="VAf-T0-cKT" firstAttribute="top" secondItem="oNQ-i1-b49" secondAttribute="top" id="hRj-XY-fnb"/>
                                            <constraint firstItem="gXD-0q-Avm" firstAttribute="leading" secondItem="oNQ-i1-b49" secondAttribute="leading" constant="8" id="ks5-IH-yrt"/>
                                            <constraint firstItem="1ox-xZ-Teo" firstAttribute="top" secondItem="Mwg-70-9L2" secondAttribute="bottom" constant="12" id="lYY-L9-pb6"/>
                                            <constraint firstItem="VAf-T0-cKT" firstAttribute="leading" secondItem="oNQ-i1-b49" secondAttribute="leading" id="urO-i9-GQ7"/>
                                        </constraints>
                                    </view>
                                </subviews>
                                <color key="backgroundColor" red="0.46202266219999999" green="0.83828371759999998" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
                                <constraints>
                                    <constraint firstItem="oNQ-i1-b49" firstAttribute="top" secondItem="XBn-Je-V51" secondAttribute="top" id="FGL-wN-OHg"/>
                                    <constraint firstItem="oNQ-i1-b49" firstAttribute="leading" secondItem="XBn-Je-V51" secondAttribute="leading" id="f4T-Mh-ZdB"/>
                                    <constraint firstAttribute="bottom" secondItem="oNQ-i1-b49" secondAttribute="bottom" id="qwX-hf-UtO"/>
                                    <constraint firstAttribute="trailing" secondItem="oNQ-i1-b49" secondAttribute="trailing" id="tdW-x1-DtX"/>
                                    <constraint firstItem="oNQ-i1-b49" firstAttribute="width" secondItem="XBn-Je-V51" secondAttribute="width" id="urs-jZ-3Hi"/>
                                </constraints>
                            </scrollView>
                        </subviews>
                        <color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
                        <constraints>
                            <constraint firstItem="VsF-QR-ZgP" firstAttribute="trailing" secondItem="XBn-Je-V51" secondAttribute="trailing" constant="40" id="bww-Xy-uZ6"/>
                            <constraint firstItem="XBn-Je-V51" firstAttribute="top" secondItem="VsF-QR-ZgP" secondAttribute="top" constant="40" id="dP4-Ax-cgr"/>
                            <constraint firstItem="XBn-Je-V51" firstAttribute="leading" secondItem="VsF-QR-ZgP" secondAttribute="leading" constant="40" id="eof-fi-9Ml"/>
                            <constraint firstItem="VsF-QR-ZgP" firstAttribute="bottom" secondItem="XBn-Je-V51" secondAttribute="bottom" constant="40" id="euP-M7-rBT"/>
                        </constraints>
                        <viewLayoutGuide key="safeArea" id="VsF-QR-ZgP"/>
                    </view>
                    <connections>
                        <outlet property="theTextView" destination="Mwg-70-9L2" id="IWV-hn-TRM"/>
                    </connections>
                </viewController>
                <placeholder placeholderIdentifier="IBFirstResponder" id="q25-D5-Cge" userLabel="First Responder" sceneMemberID="firstResponder"/>
            </objects>
            <point key="canvasLocation" x="-114.40000000000001" y="58.920539730134934"/>
        </scene>
    </scenes>
</document>

示例视图
（300分高）

好的，原来我有一些限制，不允许文本视图正确调整大小。我禁用了文本视图上的滚动，删除了滚动视图和内容视图上的高度限制，现在一切都正常了。我很感激你给我的建议！你们真是帮了大忙

0请参阅下面的链接：--将动态高度设置为UIScrollView Swift@Mayankwawahwa，该链接对我没有帮助。我试着照他们说的做。请您进一步解释一下，如果您禁用文本视图上的滚动，它将自动调整大小，就像带有nu的标签一样

<?xml version="1.0" encoding="UTF-8"?>
<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="14460.31" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES" initialViewController="HAr-gQ-Ow4">
    <device id="retina4_7" orientation="portrait">
        <adaptation id="fullscreen"/>
    </device>
    <dependencies>
        <deployment identifier="iOS"/>
        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="14460.20"/>
        <capability name="Safe area layout guides" minToolsVersion="9.0"/>
        <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
    </dependencies>
    <scenes>
        <!--Text Viewin Scroll View Controller-->
        <scene sceneID="0zs-mA-Zcw">
            <objects>
                <viewController id="HAr-gQ-Ow4" customClass="TextViewinScrollViewController" customModule="XC10SWScratch" customModuleProvider="target" sceneMemberID="viewController">
                    <view key="view" contentMode="scaleToFill" id="oNR-og-qiK">
                        <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="XBn-Je-V51">
                                <rect key="frame" x="40" y="60" width="295" height="567"/>
                                <subviews>
                                    <view contentMode="scaleToFill" translatesAutoresizingMaskIntoConstraints="NO" id="oNQ-i1-b49" userLabel="Container">
                                        <rect key="frame" x="0.0" y="0.0" width="295" height="675.5"/>
                                        <subviews>
                                            <imageView userInteractionEnabled="NO" contentMode="scaleToFill" horizontalHuggingPriority="251" verticalHuggingPriority="251" translatesAutoresizingMaskIntoConstraints="NO" id="VAf-T0-cKT">
                                                <rect key="frame" x="0.0" y="0.0" width="295" height="240"/>
                                                <color key="backgroundColor" white="0.0" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
                                                <constraints>
                                                    <constraint firstAttribute="height" constant="240" id="NzL-9L-Ybs"/>
                                                </constraints>
                                            </imageView>
                                            <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="K3u-yi-BbX">
                                                <rect key="frame" x="51.5" y="252" width="192" height="26"/>
                                                <color key="backgroundColor" red="0.92143100499999997" green="0.92145264149999995" blue="0.92144101860000005" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
                                                <inset key="contentEdgeInsets" minX="10" minY="4" maxX="10" maxY="4"/>
                                                <state key="normal" title="Change Text in Text View"/>
                                                <connections>
                                                    <action selector="didTap:" destination="HAr-gQ-Ow4" eventType="touchUpInside" id="dnw-ff-qw3"/>
                                                </connections>
                                            </button>
                                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Content Description" textAlignment="center" lineBreakMode="tailTruncation" numberOfLines="0" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="gXD-0q-Avm">
                                                <rect key="frame" x="8" y="290" width="153.5" height="20.5"/>
                                                <color key="backgroundColor" red="0.92143100499999997" green="0.92145264149999995" blue="0.92144101860000005" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
                                                <fontDescription key="fontDescription" type="system" pointSize="17"/>
                                                <nil key="textColor"/>
                                                <nil key="highlightedColor"/>
                                            </label>
                                            <textView clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="scaleToFill" scrollEnabled="NO" editable="NO" text="This is the Text View" textAlignment="natural" translatesAutoresizingMaskIntoConstraints="NO" id="Mwg-70-9L2">
                                                <rect key="frame" x="20" y="322.5" width="255" height="33"/>
                                                <color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
                                                <fontDescription key="fontDescription" type="system" pointSize="14"/>
                                                <textInputTraits key="textInputTraits" autocapitalizationType="sentences"/>
                                            </textView>
                                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" textAlignment="center" lineBreakMode="tailTruncation" numberOfLines="0" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="1ox-xZ-Teo" userLabel="Example View">
                                                <rect key="frame" x="20" y="367.5" width="255" height="300"/>
                                                <color key="backgroundColor" red="0.92143100499999997" green="0.92145264149999995" blue="0.92144101860000005" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
                                                <constraints>
                                                    <constraint firstAttribute="height" constant="300" id="hXk-ck-CvF"/>
                                                </constraints>
                                                <string key="text">Example View
(300-pts Height)</string>
                                                <fontDescription key="fontDescription" type="system" pointSize="17"/>
                                                <nil key="textColor"/>
                                                <nil key="highlightedColor"/>
                                            </label>
                                        </subviews>
                                        <color key="backgroundColor" red="1" green="0.83234566450000003" blue="0.47320586440000001" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
                                        <constraints>
                                            <constraint firstItem="gXD-0q-Avm" firstAttribute="top" secondItem="K3u-yi-BbX" secondAttribute="bottom" constant="12" id="7gX-pC-zmh"/>
                                            <constraint firstItem="Mwg-70-9L2" firstAttribute="width" secondItem="oNQ-i1-b49" secondAttribute="width" constant="-40" id="9pZ-ja-g7R"/>
                                            <constraint firstItem="Mwg-70-9L2" firstAttribute="centerX" secondItem="oNQ-i1-b49" secondAttribute="centerX" id="Byo-5N-WXf"/>
                                            <constraint firstAttribute="trailing" secondItem="VAf-T0-cKT" secondAttribute="trailing" id="FyF-by-edM"/>
                                            <constraint firstItem="1ox-xZ-Teo" firstAttribute="width" secondItem="Mwg-70-9L2" secondAttribute="width" id="Lic-3Q-vWZ"/>
                                            <constraint firstAttribute="bottom" secondItem="1ox-xZ-Teo" secondAttribute="bottom" constant="8" id="MQK-MS-dCA"/>
                                            <constraint firstItem="K3u-yi-BbX" firstAttribute="centerX" secondItem="oNQ-i1-b49" secondAttribute="centerX" id="UPN-FD-gxb"/>
                                            <constraint firstItem="K3u-yi-BbX" firstAttribute="top" secondItem="VAf-T0-cKT" secondAttribute="bottom" constant="12" id="WMi-Vl-xBu"/>
                                            <constraint firstItem="1ox-xZ-Teo" firstAttribute="centerX" secondItem="oNQ-i1-b49" secondAttribute="centerX" id="dno-nR-zvQ"/>
                                            <constraint firstItem="Mwg-70-9L2" firstAttribute="top" secondItem="gXD-0q-Avm" secondAttribute="bottom" constant="12" id="fDe-GP-gs4"/>
                                            <constraint firstItem="VAf-T0-cKT" firstAttribute="top" secondItem="oNQ-i1-b49" secondAttribute="top" id="hRj-XY-fnb"/>
                                            <constraint firstItem="gXD-0q-Avm" firstAttribute="leading" secondItem="oNQ-i1-b49" secondAttribute="leading" constant="8" id="ks5-IH-yrt"/>
                                            <constraint firstItem="1ox-xZ-Teo" firstAttribute="top" secondItem="Mwg-70-9L2" secondAttribute="bottom" constant="12" id="lYY-L9-pb6"/>
                                            <constraint firstItem="VAf-T0-cKT" firstAttribute="leading" secondItem="oNQ-i1-b49" secondAttribute="leading" id="urO-i9-GQ7"/>
                                        </constraints>
                                    </view>
                                </subviews>
                                <color key="backgroundColor" red="0.46202266219999999" green="0.83828371759999998" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
                                <constraints>
                                    <constraint firstItem="oNQ-i1-b49" firstAttribute="top" secondItem="XBn-Je-V51" secondAttribute="top" id="FGL-wN-OHg"/>
                                    <constraint firstItem="oNQ-i1-b49" firstAttribute="leading" secondItem="XBn-Je-V51" secondAttribute="leading" id="f4T-Mh-ZdB"/>
                                    <constraint firstAttribute="bottom" secondItem="oNQ-i1-b49" secondAttribute="bottom" id="qwX-hf-UtO"/>
                                    <constraint firstAttribute="trailing" secondItem="oNQ-i1-b49" secondAttribute="trailing" id="tdW-x1-DtX"/>
                                    <constraint firstItem="oNQ-i1-b49" firstAttribute="width" secondItem="XBn-Je-V51" secondAttribute="width" id="urs-jZ-3Hi"/>
                                </constraints>
                            </scrollView>
                        </subviews>
                        <color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
                        <constraints>
                            <constraint firstItem="VsF-QR-ZgP" firstAttribute="trailing" secondItem="XBn-Je-V51" secondAttribute="trailing" constant="40" id="bww-Xy-uZ6"/>
                            <constraint firstItem="XBn-Je-V51" firstAttribute="top" secondItem="VsF-QR-ZgP" secondAttribute="top" constant="40" id="dP4-Ax-cgr"/>
                            <constraint firstItem="XBn-Je-V51" firstAttribute="leading" secondItem="VsF-QR-ZgP" secondAttribute="leading" constant="40" id="eof-fi-9Ml"/>
                            <constraint firstItem="VsF-QR-ZgP" firstAttribute="bottom" secondItem="XBn-Je-V51" secondAttribute="bottom" constant="40" id="euP-M7-rBT"/>
                        </constraints>
                        <viewLayoutGuide key="safeArea" id="VsF-QR-ZgP"/>
                    </view>
                    <connections>
                        <outlet property="theTextView" destination="Mwg-70-9L2" id="IWV-hn-TRM"/>
                    </connections>
                </viewController>
                <placeholder placeholderIdentifier="IBFirstResponder" id="q25-D5-Cge" userLabel="First Responder" sceneMemberID="firstResponder"/>
            </objects>
            <point key="canvasLocation" x="-114.40000000000001" y="58.920539730134934"/>
        </scene>
    </scenes>
</document>