带有UITableView的contentView不在UIScrollView中滚动
我正在创建一个包含许多字段的简单“创建个人资料”。尽管内容大于滚动视图的大小，但我的视图仍未滚动。我认为部分问题是contentView内部内容之间的关系。我希望表格视图中的单元格是动态的，以便以后可以添加更多信息，并且滚动仍会执行。我在viewDidLoad()
我查看了其他答案，并尝试将其实现无效。例如，我引用了Height of contentView of UIScrollView based on inside content using Storyboard。
要动态调整表格视图的内容，我编写了以下内容：
override func viewDidLayoutSubviews() {
DispatchQueue.main.async {
var frame = self.tableView.frame
frame.size.height = self.tableView.contentSize.height
self.tableView.frame = frame
self.updateViewConstraints()
}
}
对于约束，我的层次结构是“超级视图”>“滚动视图”>“内容视图”>“元素”。
从本质上讲，每个元素都取决于其上一个相邻元素，并且每个元素都有设置的高度。 TableView例外，其高度不固定，并将根据其下方的邻居（错误标签）进行拉伸。然后将错误标签限制在视图的底部。这是更直观的表示。
这是实际结果：
我认为问题在于错误标签对表视图的约束没有被更新，但是我在这里没有看到什么吗？顶部栏下方的所有内容均应滚动。
1 个答案:
答案 0 :(得分：1)
这是一个基本示例，使用“自我调整”表视图。不需要heightForRowAt或显式设置.contentSize，这些都由自动布局和约束来处理。
有几行（无滚动）：
还有几行（仍然没有滚动）：
现在有了足够的行，我们 需要滚动：
这是在IB /故事板中的设置方式：
这是源代码：
//
// DaveViewController.swift
//
// Created by Don Mag on 7/1/19.
//
import UIKit
final class ContentSizedTableView: UITableView {
override var contentSize:CGSize {
didSet {
invalidateIntrinsicContentSize()
}
}
override var intrinsicContentSize: CGSize {
layoutIfNeeded()
return CGSize(width: UIView.noIntrinsicMetric, height: contentSize.height)
}
}
class DaveCell: UITableViewCell {
@IBOutlet var theLabel: UILabel!
@IBOutlet var theTextField: UITextField!
}
class DaveViewController: UIViewController {
@IBOutlet var theTableView: ContentSizedTableView!
@IBOutlet var theScrollView: UIScrollView!
let theLabels: [String] = [
"NAME",
"COMPANY",
"POSITION",
"CITY, STATE",
"EMAIL ADDRESS",
"ADDTL EMAIL\nADDRESS",
"WORK NUMBER",
"CELL NUMBER",
]
let thePlaceholders: [String] = [
"your name",
"e.g. Bizee Inc.",
"e.g. Regional Manager",
"e.g. Denver, Colorado",
"name@email.com",
"name@email.com",
"(XXX) XXX-XXXX",
"(XXX) XXX-XXXX",
]
override func viewDidLoad() {
super.viewDidLoad()
theTableView.dataSource = self
theTableView.delegate = self
theTableView.isScrollEnabled = false
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillShow), name: UIResponder.keyboardWillShowNotification, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillHide), name: UIResponder.keyboardWillHideNotification, object: nil)
// add a "Done" button to dismiss the keyboard
let doneBtn = UIBarButtonItem(barButtonSystemItem: .done, target: self, action: #selector(doneTapped))
self.navigationItem.rightBarButtonItem = doneBtn
}
@objc private func doneTapped() {
view.endEditing(true)
}
@objc private func keyboardWillShow(notification: NSNotification){
guard let keyboardFrame = notification.userInfo![UIResponder.keyboardFrameEndUserInfoKey] as? NSValue else { return }
theScrollView.contentInset.bottom = view.convert(keyboardFrame.cgRectValue, from: nil).size.height
}
@objc private func keyboardWillHide(notification: NSNotification){
theScrollView.contentInset.bottom = 0
}
}
extension DaveViewController: UITableViewDataSource, UITableViewDelegate {
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return theLabels.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "DaveCell", for: indexPath) as! DaveCell
cell.theLabel.text = theLabels[indexPath.row]
cell.theTextField.placeholder = thePlaceholders[indexPath.row]
cell.selectionStyle = .none
return cell
}
}
这是情节提要的源代码：
<?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="OCG-fk-O07">
<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>
<!--Dave View Controller-->
<scene sceneID="gYy-6C-lIo">
<objects>
<viewController id="ByF-jo-q34" customClass="DaveViewController" customModule="LaunchTest2" customModuleProvider="target" sceneMemberID="viewController">
<view key="view" contentMode="scaleToFill" id="KzY-ir-ZNp">
<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="sfU-bN-guh">
<rect key="frame" x="0.0" y="64" width="375" height="603"/>
<subviews>
<view contentMode="scaleToFill" translatesAutoresizingMaskIntoConstraints="NO" id="SCY-zE-Vif">
<rect key="frame" x="0.0" y="0.0" width="375" height="603"/>
<subviews>
<label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Import Using LinkedIn" textAlignment="center" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="kg2-26-RDd">
<rect key="frame" x="104" y="12" width="167.5" height="20.5"/>
<color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
<fontDescription key="fontDescription" type="system" pointSize="17"/>
<nil key="textColor"/>
<nil key="highlightedColor"/>
</label>
<view contentMode="scaleToFill" translatesAutoresizingMaskIntoConstraints="NO" id="d56-0u-ihe">
<rect key="frame" x="0.0" y="44.5" width="375" height="102.5"/>
<subviews>
<label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Choose Profile Photo" textAlignment="center" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="8zb-Kb-NJY">
<rect key="frame" x="108" y="20" width="159.5" height="20.5"/>
<fontDescription key="fontDescription" type="system" weight="thin" pointSize="17"/>
<nil key="textColor"/>
<nil key="highlightedColor"/>
</label>
<stackView opaque="NO" contentMode="scaleToFill" distribution="fillEqually" spacing="6" translatesAutoresizingMaskIntoConstraints="NO" id="KiU-vK-XXr">
<rect key="frame" x="12" y="50.5" width="351" height="32"/>
<subviews>
<button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="7Ri-fC-xIB">
<rect key="frame" x="0.0" y="0.0" width="172.5" height="32"/>
<color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
<fontDescription key="fontDescription" type="system" weight="thin" pointSize="16"/>
<state key="normal" title="Use Camera">
<color key="titleColor" white="0.0" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
</state>
</button>
<button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="RYr-md-Xbc">
<rect key="frame" x="178.5" y="0.0" width="172.5" height="32"/>
<color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
<fontDescription key="fontDescription" type="system" weight="thin" pointSize="16"/>
<state key="normal" title="Use Photo Library">
<color key="titleColor" white="0.0" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
</state>
</button>
</subviews>
</stackView>
</subviews>
<color key="backgroundColor" red="0.91764705882352937" green="0.91764705882352937" blue="0.91764705882352937" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
<constraints>
<constraint firstItem="8zb-Kb-NJY" firstAttribute="centerX" secondItem="d56-0u-ihe" secondAttribute="centerX" id="Ipm-mu-u52"/>
<constraint firstAttribute="trailing" secondItem="KiU-vK-XXr" secondAttribute="trailing" constant="12" id="M6p-kS-2Wj"/>
<constraint firstItem="8zb-Kb-NJY" firstAttribute="top" secondItem="d56-0u-ihe" secondAttribute="top" constant="20" id="R3e-cc-Fer"/>
<constraint firstAttribute="bottom" secondItem="KiU-vK-XXr" secondAttribute="bottom" constant="20" id="gX4-Zs-QVl"/>
<constraint firstItem="KiU-vK-XXr" firstAttribute="top" secondItem="8zb-Kb-NJY" secondAttribute="bottom" constant="10" id="inN-ct-lOI"/>
<constraint firstItem="KiU-vK-XXr" firstAttribute="leading" secondItem="d56-0u-ihe" secondAttribute="leading" constant="12" id="sFN-WJ-e2x"/>
</constraints>
</view>
<tableView clipsSubviews="YES" contentMode="scaleToFill" alwaysBounceVertical="YES" dataMode="prototypes" style="plain" separatorStyle="default" rowHeight="-1" estimatedRowHeight="-1" sectionHeaderHeight="28" sectionFooterHeight="28" translatesAutoresizingMaskIntoConstraints="NO" id="lnj-TZ-tdQ" customClass="ContentSizedTableView" customModule="LaunchTest2" customModuleProvider="target">
<rect key="frame" x="20" y="159" width="335" height="160"/>
<color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
<constraints>
<constraint firstAttribute="height" priority="250" constant="160" id="OWa-SK-1bb"/>
</constraints>
<prototypes>
<tableViewCell clipsSubviews="YES" contentMode="scaleToFill" preservesSuperviewLayoutMargins="YES" selectionStyle="default" indentationWidth="10" reuseIdentifier="DaveCell" rowHeight="67" id="UZ0-mW-z3R" customClass="DaveCell" customModule="LaunchTest2" customModuleProvider="target">
<rect key="frame" x="0.0" y="28" width="335" height="67"/>
<autoresizingMask key="autoresizingMask"/>
<tableViewCellContentView key="contentView" opaque="NO" clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="center" preservesSuperviewLayoutMargins="YES" insetsLayoutMarginsFromSafeArea="NO" tableViewCell="UZ0-mW-z3R" id="Bpu-ZK-jmH">
<rect key="frame" x="0.0" y="0.0" width="335" height="66.5"/>
<autoresizingMask key="autoresizingMask"/>
<subviews>
<label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Label" textAlignment="natural" lineBreakMode="tailTruncation" numberOfLines="0" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="cta-dh-NKD">
<rect key="frame" x="15" y="23" width="42" height="21"/>
<fontDescription key="fontDescription" type="system" pointSize="17"/>
<nil key="textColor"/>
<nil key="highlightedColor"/>
</label>
<textField opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="left" contentVerticalAlignment="center" borderStyle="roundedRect" textAlignment="right" minimumFontSize="17" translatesAutoresizingMaskIntoConstraints="NO" id="CgS-ib-w4y">
<rect key="frame" x="69" y="18.5" width="251" height="30"/>
<nil key="textColor"/>
<fontDescription key="fontDescription" type="system" pointSize="14"/>
<textInputTraits key="textInputTraits"/>
</textField>
</subviews>
<constraints>
<constraint firstItem="cta-dh-NKD" firstAttribute="top" secondItem="Bpu-ZK-jmH" secondAttribute="topMargin" constant="12" id="We1-kz-q2C"/>
<constraint firstAttribute="bottomMargin" secondItem="cta-dh-NKD" secondAttribute="bottom" constant="12" id="Xrk-31-tpM"/>
<constraint firstItem="cta-dh-NKD" firstAttribute="leading" secondItem="Bpu-ZK-jmH" secondAttribute="leadingMargin" id="gWG-0p-rAe"/>
<constraint firstItem="CgS-ib-w4y" firstAttribute="centerY" secondItem="Bpu-ZK-jmH" secondAttribute="centerY" id="lQV-0f-plQ"/>
<constraint firstItem="CgS-ib-w4y" firstAttribute="leading" secondItem="cta-dh-NKD" secondAttribute="trailing" constant="12" id="t9H-NP-Nun"/>
<constraint firstAttribute="trailingMargin" secondItem="CgS-ib-w4y" secondAttribute="trailing" id="zfb-h1-T31"/>
</constraints>
</tableViewCellContentView>
<connections>
<outlet property="theLabel" destination="cta-dh-NKD" id="E47-0o-OD8"/>
<outlet property="theTextField" destination="CgS-ib-w4y" id="pNN-td-M2T"/>
</connections>
</tableViewCell>
</prototypes>
</tableView>
<label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Please put in a profile photo." textAlignment="center" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="rAu-zB-NyR">
<rect key="frame" x="74.5" y="573.5" width="226.5" height="21.5"/>
<color key="backgroundColor" red="1" green="0.14913141730000001" blue="0.0" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
<fontDescription key="fontDescription" type="system" weight="thin" pointSize="18"/>
<color key="textColor" white="1" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
<nil key="highlightedColor"/>
</label>
</subviews>
<color key="backgroundColor" red="0.45138680930000002" green="0.99309605359999997" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
<constraints>
<constraint firstItem="kg2-26-RDd" firstAttribute="top" secondItem="SCY-zE-Vif" secondAttribute="top" constant="12" id="80C-f1-Inf"/>
<constraint firstItem="rAu-zB-NyR" firstAttribute="top" relation="greaterThanOrEqual" secondItem="lnj-TZ-tdQ" secondAttribute="bottom" constant="8" id="9Sg-Aa-wir"/>
<constraint firstItem="lnj-TZ-tdQ" firstAttribute="top" secondItem="d56-0u-ihe" secondAttribute="bottom" constant="12" id="EhF-Gu-8vx"/>
<constraint firstAttribute="trailing" secondItem="d56-0u-ihe" secondAttribute="trailing" id="NuV-lh-WRd"/>
<constraint firstItem="d56-0u-ihe" firstAttribute="top" secondItem="kg2-26-RDd" secondAttribute="bottom" constant="12" id="Ppo-X8-gdk"/>
<constraint firstItem="lnj-TZ-tdQ" firstAttribute="leading" secondItem="SCY-zE-Vif" secondAttribute="leading" constant="20" id="QBd-ca-Itt"/>
<constraint firstItem="kg2-26-RDd" firstAttribute="centerX" secondItem="SCY-zE-Vif" secondAttribute="centerX" id="TLP-ZG-cWf"/>
<constraint firstItem="rAu-zB-NyR" firstAttribute="centerX" secondItem="SCY-zE-Vif" secondAttribute="centerX" id="Zat-D4-CeV"/>
<constraint firstAttribute="bottom" secondItem="rAu-zB-NyR" secondAttribute="bottom" constant="8" id="jdI-I6-eub"/>
<constraint firstAttribute="trailing" secondItem="lnj-TZ-tdQ" secondAttribute="trailing" constant="20" id="qls-uL-RxI"/>
<constraint firstItem="d56-0u-ihe" firstAttribute="leading" secondItem="SCY-zE-Vif" secondAttribute="leading" id="yBB-ls-1fU"/>
</constraints>
</view>
</subviews>
<color key="backgroundColor" red="0.99942404029999998" green="0.98555368190000003" blue="0.0" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
<constraints>
<constraint firstItem="SCY-zE-Vif" firstAttribute="width" secondItem="sfU-bN-guh" secondAttribute="width" id="0AS-Bw-vgM"/>
<constraint firstItem="SCY-zE-Vif" firstAttribute="height" secondItem="sfU-bN-guh" secondAttribute="height" priority="250" id="1nY-0L-LLo"/>
<constraint firstItem="SCY-zE-Vif" firstAttribute="top" secondItem="sfU-bN-guh" secondAttribute="top" id="Rqy-JP-jge"/>
<constraint firstAttribute="bottom" secondItem="SCY-zE-Vif" secondAttribute="bottom" id="S3L-Zg-fgS"/>
<constraint firstItem="SCY-zE-Vif" firstAttribute="leading" secondItem="sfU-bN-guh" secondAttribute="leading" id="fON-cd-chM"/>
<constraint firstAttribute="trailing" secondItem="SCY-zE-Vif" secondAttribute="trailing" id="vYb-7j-GxU"/>
</constraints>
</scrollView>
</subviews>
<color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
<constraints>
<constraint firstItem="6HN-hq-UwM" firstAttribute="bottom" secondItem="sfU-bN-guh" secondAttribute="bottom" id="1QS-4N-gEW"/>
<constraint firstItem="sfU-bN-guh" firstAttribute="leading" secondItem="6HN-hq-UwM" secondAttribute="leading" id="5Ur-Gf-8pP"/>
<constraint firstItem="sfU-bN-guh" firstAttribute="top" secondItem="6HN-hq-UwM" secondAttribute="top" id="7DE-le-6vP"/>
<constraint firstItem="6HN-hq-UwM" firstAttribute="trailing" secondItem="sfU-bN-guh" secondAttribute="trailing" id="N4k-MG-Uef"/>
</constraints>
<viewLayoutGuide key="safeArea" id="6HN-hq-UwM"/>
</view>
<navigationItem key="navigationItem" id="Wwb-5l-bvB"/>
<connections>
<outlet property="theScrollView" destination="sfU-bN-guh" id="Mtz-hh-9i3"/>
<outlet property="theTableView" destination="lnj-TZ-tdQ" id="Rqn-pk-icA"/>
</connections>
</viewController>
<placeholder placeholderIdentifier="IBFirstResponder" id="mX1-qt-jnP" userLabel="First Responder" sceneMemberID="firstResponder"/>
</objects>
<point key="canvasLocation" x="928.79999999999995" y="132.68365817091455"/>
</scene>
<!--Navigation Controller-->
<scene sceneID="1J1-9A-mRF">
<objects>
<navigationController automaticallyAdjustsScrollViewInsets="NO" id="OCG-fk-O07" sceneMemberID="viewController">
<toolbarItems/>
<navigationBar key="navigationBar" contentMode="scaleToFill" insetsLayoutMarginsFromSafeArea="NO" id="RAe-Db-aHt">
<rect key="frame" x="0.0" y="20" width="375" height="44"/>
<autoresizingMask key="autoresizingMask"/>
</navigationBar>
<nil name="viewControllers"/>
<connections>
<segue destination="ByF-jo-q34" kind="relationship" relationship="rootViewController" id="9V8-EB-duR"/>
</connections>
</navigationController>
<placeholder placeholderIdentifier="IBFirstResponder" id="Asf-IX-RlV" userLabel="First Responder" sceneMemberID="firstResponder"/>
</objects>
<point key="canvasLocation" x="-10.4" y="132.68365817091455"/>
</scene>
</scenes>
</document>
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