当受限于包含多行UILabel的UIStackview时，UITableViewCell高度不是动态的
问题描述 投票：1回答：1
我有一个包含UIStackView的tableview单元格。堆栈视图包含两个标签，可以是多行，另一个是底部的堆栈视图。这是细胞应该出现的方式，但有更多的余量。这在配置文件picView的顶部和底部有一个15点约束到superview。理想情况下，15pt顶部和底部约束将位于堆栈视图上。
当我将堆栈视图中的顶部和底部约束添加到superview时，中间的多行标签被强制为1行。
我想要所有标签的顶部和底部边距正确显示多行。
如果我将底部标签的垂直阻力设置为高于顶部标签，则顶部标签会消失。
如果我将垂直内容拥抱优先级设置为一个Label，则另一个Label会被剪裁。如果我将两个标签Hugting Priority设置为相等，则不满足约束，并且它要求我提高一个。
我不明白逻辑，我希望两个标签都根据内容增长，并相应地调整单元格的大小。为什么我需要给一个优先权？
如果我从堆栈视图中删除顶部和底部约束到单元格的内容视图，则不必将一个标签的Content Hugging优先级设置为高于另一个。但我想要保证金的上限和下限。
我尝试将标签约束到堆栈视图，但它产生了相同的结果。堆栈视图“对齐”设置为“填充”。分配设置为按比例填写。改变这些值并没有太大变化。 tableview是估计行高和行高设置为自动维度。
有什么建议？
1个回答
1
投票
投票
同时提供图像视图和堆栈视图：
>=15的顶部和底部限制- CenturY约束
单元格高度将成为两者中较大的一个，而另一个将保持垂直居中。
这是一个例子：
结果：
注意：您还需要为某些元素调整内容拥抱和压缩阻力优先级（这在使用堆栈视图时很常见）。
以下是我使用的单元格和视图控制器类（显然，我只设置了演示此内容所需的元素）：
class StackedCell: UITableViewCell {
@IBOutlet var titleLabel: UILabel!
@IBOutlet var descriptionLabel: UILabel!
}
class StackCellTableViewController: UITableViewController {
var theData : [[String]] = [
["John Bradford", "This is short text."],
["Tom Bradford", "This is long enough text to cause wrapping."],
["Fred Bradford", "This text is also long enough to wrap, but this time onto a couple lines -- which will be no problem."],
["Mr. David With a Wrapping Name Bradford", "This is short text"],
["Mr. Edward With a Wrapping Name Bradford", "Both labels should have enough text to cause wrapping."],
]
override func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return theData.count
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "StackedCell", for: indexPath) as! StackedCell
cell.titleLabel.text = theData[indexPath.row][0]
cell.descriptionLabel.text = theData[indexPath.row][1]
return cell
}
}
以下是故事板的来源，可帮助您顺利前进：
<?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="MSE-mh-zOH">
<device id="retina4_7" orientation="portrait">
<adaptation id="fullscreen"/>
</device>
<dependencies>
<plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="14460.20"/>
<capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
</dependencies>
<scenes>
<!--Stack Cell Table View Controller-->
<scene sceneID="diu-E1-9Ab">
<objects>
<tableViewController id="mgB-HM-TNh" customClass="StackCellTableViewController" customModule="XC10SWScratch" customModuleProvider="target" sceneMemberID="viewController">
<tableView key="view" clipsSubviews="YES" contentMode="scaleToFill" alwaysBounceVertical="YES" dataMode="prototypes" style="plain" separatorStyle="default" rowHeight="-1" estimatedRowHeight="-1" sectionHeaderHeight="28" sectionFooterHeight="28" id="NLY-of-j1O">
<rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
<autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
<color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
<prototypes>
<tableViewCell clipsSubviews="YES" contentMode="scaleToFill" preservesSuperviewLayoutMargins="YES" selectionStyle="default" indentationWidth="10" reuseIdentifier="StackedCell" rowHeight="137" id="8QS-VE-jU8" customClass="StackedCell" customModule="XC10SWScratch" customModuleProvider="target">
<rect key="frame" x="0.0" y="28" width="375" height="137"/>
<autoresizingMask key="autoresizingMask"/>
<tableViewCellContentView key="contentView" opaque="NO" clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="center" preservesSuperviewLayoutMargins="YES" insetsLayoutMarginsFromSafeArea="NO" tableViewCell="8QS-VE-jU8" id="Sks-7v-DrQ">
<rect key="frame" x="0.0" y="0.0" width="375" height="136.5"/>
<autoresizingMask key="autoresizingMask"/>
<subviews>
<imageView userInteractionEnabled="NO" contentMode="scaleToFill" horizontalHuggingPriority="251" verticalHuggingPriority="251" translatesAutoresizingMaskIntoConstraints="NO" id="e9C-Vu-DFw" userLabel="ProfileImage">
<rect key="frame" x="16" y="38.5" width="60" height="60"/>
<color key="backgroundColor" red="0.46202266219999999" green="0.83828371759999998" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
<constraints>
<constraint firstAttribute="width" secondItem="e9C-Vu-DFw" secondAttribute="height" multiplier="1:1" id="6dF-Hg-kn8"/>
<constraint firstAttribute="width" constant="60" id="cAO-Ur-Qay"/>
</constraints>
</imageView>
<stackView opaque="NO" contentMode="scaleToFill" axis="vertical" spacing="4" translatesAutoresizingMaskIntoConstraints="NO" id="lS6-6c-Vgn" userLabel="LabelsStack">
<rect key="frame" x="88" y="36.5" width="226" height="63.5"/>
<subviews>
<label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="1000" verticalCompressionResistancePriority="1000" text="John Bradford" textAlignment="natural" lineBreakMode="tailTruncation" numberOfLines="0" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="bi0-SV-Oba">
<rect key="frame" x="0.0" y="0.0" width="226" height="21.5"/>
<fontDescription key="fontDescription" type="system" weight="semibold" pointSize="18"/>
<nil key="textColor"/>
<nil key="highlightedColor"/>
</label>
<label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="1000" verticalCompressionResistancePriority="1000" text="This is the Description Label." textAlignment="natural" lineBreakMode="tailTruncation" numberOfLines="0" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="VrD-Zq-XEM">
<rect key="frame" x="0.0" y="25.5" width="226" height="17"/>
<fontDescription key="fontDescription" type="system" pointSize="14"/>
<nil key="textColor"/>
<nil key="highlightedColor"/>
</label>
<view contentMode="scaleToFill" verticalHuggingPriority="1000" translatesAutoresizingMaskIntoConstraints="NO" id="TVE-Sc-9ZR" userLabel="StarsView">
<rect key="frame" x="0.0" y="46.5" width="226" height="17"/>
<subviews>
<stackView opaque="NO" contentMode="scaleToFill" verticalHuggingPriority="1000" spacing="8" translatesAutoresizingMaskIntoConstraints="NO" id="Bxs-Tn-foO" userLabel="StarsStack">
<rect key="frame" x="0.0" y="0.0" width="148" height="17"/>
<subviews>
<label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="1000" text="★" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="nvJ-Q5-WhG">
<rect key="frame" x="0.0" y="0.0" width="16" height="17"/>
<fontDescription key="fontDescription" type="system" pointSize="18"/>
<color key="textColor" red="1" green="0.83234566450000003" blue="0.47320586440000001" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
<nil key="highlightedColor"/>
</label>
<label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="1000" text="★" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="QzW-RR-1Er">
<rect key="frame" x="24" y="0.0" width="16" height="17"/>
<fontDescription key="fontDescription" type="system" pointSize="18"/>
<color key="textColor" red="1" green="0.83234566450000003" blue="0.47320586440000001" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
<nil key="highlightedColor"/>
</label>
<label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="1000" text="★" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="3HC-Vh-iSJ">
<rect key="frame" x="48" y="0.0" width="16" height="17"/>
<fontDescription key="fontDescription" type="system" pointSize="18"/>
<color key="textColor" red="1" green="0.83234566450000003" blue="0.47320586440000001" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
<nil key="highlightedColor"/>
</label>
<label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="1000" text="★" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="KC3-u8-XWI">
<rect key="frame" x="72" y="0.0" width="16" height="17"/>
<fontDescription key="fontDescription" type="system" pointSize="18"/>
<color key="textColor" red="1" green="0.83234566450000003" blue="0.47320586440000001" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
<nil key="highlightedColor"/>
</label>
<label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="1000" text="★" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="m51-4b-ADh">
<rect key="frame" x="96" y="0.0" width="16" height="17"/>
<fontDescription key="fontDescription" type="system" pointSize="18"/>
<color key="textColor" red="0.75406885150000003" green="0.75408679249999999" blue="0.75407713649999997" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
<nil key="highlightedColor"/>
</label>
<label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="1000" text="(53)" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="aJw-Yl-uQh">
<rect key="frame" x="120" y="0.0" width="28" height="17"/>
<fontDescription key="fontDescription" type="system" pointSize="14"/>
<color key="textColor" white="0.66666666666666663" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
<nil key="highlightedColor"/>
</label>
</subviews>
</stackView>
</subviews>
<color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
<constraints>
<constraint firstItem="Bxs-Tn-foO" firstAttribute="top" secondItem="TVE-Sc-9ZR" secondAttribute="top" id="1C6-g6-TFj"/>
<constraint firstAttribute="bottom" secondItem="Bxs-Tn-foO" secondAttribute="bottom" id="A5M-bL-fmw"/>
<constraint firstItem="Bxs-Tn-foO" firstAttribute="leading" secondItem="TVE-Sc-9ZR" secondAttribute="leading" id="gBy-fg-xaP"/>
</constraints>
</view>
</subviews>
</stackView>
<button opaque="NO" contentMode="scaleToFill" horizontalHuggingPriority="1000" horizontalCompressionResistancePriority="1000" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="22x-DH-zgf" userLabel="EditButton">
<rect key="frame" x="326" y="53.5" width="33" height="30"/>
<state key="normal" title="EDIT"/>
</button>
</subviews>
<constraints>
<constraint firstAttribute="bottomMargin" relation="greaterThanOrEqual" secondItem="22x-DH-zgf" secondAttribute="bottom" constant="15" id="6ko-9c-f8E"/>
<constraint firstAttribute="bottomMargin" relation="greaterThanOrEqual" secondItem="e9C-Vu-DFw" secondAttribute="bottom" constant="15" id="E8y-Nx-e6k"/>
<constraint firstItem="e9C-Vu-DFw" firstAttribute="centerY" secondItem="Sks-7v-DrQ" secondAttribute="centerY" id="Fsi-Ia-Vh7"/>
<constraint firstItem="22x-DH-zgf" firstAttribute="leading" secondItem="lS6-6c-Vgn" secondAttribute="trailing" constant="12" id="I1T-WO-RhK"/>
<constraint firstItem="22x-DH-zgf" firstAttribute="top" relation="greaterThanOrEqual" secondItem="Sks-7v-DrQ" secondAttribute="topMargin" constant="15" id="Oqf-MF-AyE"/>
<constraint firstItem="lS6-6c-Vgn" firstAttribute="leading" secondItem="e9C-Vu-DFw" secondAttribute="trailing" constant="12" id="Y46-0s-kcr"/>
<constraint firstAttribute="trailingMargin" secondItem="22x-DH-zgf" secondAttribute="trailing" id="c67-Xj-1i7"/>
<constraint firstItem="lS6-6c-Vgn" firstAttribute="top" relation="greaterThanOrEqual" secondItem="Sks-7v-DrQ" secondAttribute="top" constant="15" id="ei6-pz-Bnr"/>
<constraint firstItem="lS6-6c-Vgn" firstAttribute="centerY" secondItem="Sks-7v-DrQ" secondAttribute="centerY" id="mys-LE-jkm"/>
<constraint firstAttribute="bottom" relation="greaterThanOrEqual" secondItem="lS6-6c-Vgn" secondAttribute="bottom" constant="15" id="rHM-XF-n4C"/>
<constraint firstItem="e9C-Vu-DFw" firstAttribute="leading" secondItem="Sks-7v-DrQ" secondAttribute="leadingMargin" id="uP4-26-6Uc"/>
<constraint firstItem="e9C-Vu-DFw" firstAttribute="top" relation="greaterThanOrEqual" secondItem="Sks-7v-DrQ" secondAttribute="topMargin" constant="15" id="x1z-ox-koN"/>
<constraint firstItem="22x-DH-zgf" firstAttribute="centerY" secondItem="Sks-7v-DrQ" secondAttribute="centerY" id="zxj-IG-DbW"/>
</constraints>
</tableViewCellContentView>
<connections>
<outlet property="descriptionLabel" destination="VrD-Zq-XEM" id="YT1-t7-FtK"/>
<outlet property="titleLabel" destination="bi0-SV-Oba" id="wu2-Ty-yge"/>
</connections>
</tableViewCell>
</prototypes>
<connections>
<outlet property="dataSource" destination="mgB-HM-TNh" id="Fsm-c0-afH"/>
<outlet property="delegate" destination="mgB-HM-TNh" id="Uht-Ga-aoa"/>
</connections>
</tableView>
<navigationItem key="navigationItem" id="VCY-uQ-EQ7"/>
</tableViewController>
<placeholder placeholderIdentifier="IBFirstResponder" id="uPF-XE-23l" userLabel="First Responder" sceneMemberID="firstResponder"/>
</objects>
<point key="canvasLocation" x="924" y="737.18140929535241"/>
</scene>
<!--Navigation Controller-->
<scene sceneID="F8k-zt-Ijc">
<objects>
<navigationController automaticallyAdjustsScrollViewInsets="NO" id="MSE-mh-zOH" sceneMemberID="viewController">
<toolbarItems/>
<navigationBar key="navigationBar" contentMode="scaleToFill" insetsLayoutMarginsFromSafeArea="NO" id="9T6-F6-vim">
<rect key="frame" x="0.0" y="20" width="375" height="44"/>
<autoresizingMask key="autoresizingMask"/>
</navigationBar>
<nil name="viewControllers"/>
<connections>
<segue destination="mgB-HM-TNh" kind="relationship" relationship="rootViewController" id="Dpn-ba-QhM"/>
</connections>
</navigationController>
<placeholder placeholderIdentifier="IBFirstResponder" id="zHK-UX-1Sq" userLabel="First Responder" sceneMemberID="firstResponder"/>
</objects>
<point key="canvasLocation" x="-15.199999999999999" y="737.18140929535241"/>
</scene>
</scenes>
</document>
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