ScrollViewが機能していません

Question

My ScrollViewにはコンテナビューが含まれています。コンテントビューには内容に応じた高さのdynamicViewがあります。テキストビューのスクロールが有効になっていますが、動作していません。 viewDidLayoutsでもスクロールビューのコンテンツサイズが、それも動作しません。 コードは以下の通りです：

import UIKit 

class DiaryViewViewController: UIViewController, UITextViewDelegate, UIScrollViewDelegate, TagListViewDelegate { 

var scrollView: UIScrollView! 
var containerView = UIView() 
let diaryDate = UITextView() 
var tagListView: TagListView! 
var assets: [DKAsset]? 
var diaryEntryText = UITextView() 

override func viewDidLoad() { 
    super.viewDidLoad() 

    self.scrollView = UIScrollView() 
    self.scrollView.delegate = self 
    containerView = UIView() 
    self.scrollView.delegate = self 
    scrollView.isDirectionalLockEnabled = true 
    containerView.translatesAutoresizingMaskIntoConstraints = false 

    //to fetch height of screen 
    let screenSize = UIScreen.main.bounds 
    let width = screenSize.width 
    let height = screenSize.height 


    //Top Bar 
    let topBar = UIView(frame:CGRect(x: 0,y: 0, width: width, height: 60)) 
    topBar.backgroundColor = UIColor.white 
    topBar.layer.shadowColor = UIColor.gray.cgColor 
    topBar.layer.shadowOffset = CGSize(width: 0, height: 3) 
    topBar.layer.shadowOpacity = 1 
    topBar.layer.masksToBounds = false 
    topBar.layer.shadowRadius = 8.0; 
    topBar.translatesAutoresizingMaskIntoConstraints = false 

    //Label - Title 
    let titleLabel = UILabel(frame:CGRect(x: width * 0.3, y: 13, width: width * 0.55, height: 40)) 
    titleLabel.text = "23 December 2018" 
    titleLabel.contentMode = UIViewContentMode.center 
    //include all in view 
    topBar.addSubview(titleLabel) 

    containerView.addSubview(topBar) 

    let contentSize = diaryEntryText.sizeThatFits(diaryEntryText.bounds.size) 
    diaryEntryText.text = "------Lorem ipsum dolor sit er elit lamet, consectetaur cillium adipisicing pecu, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum. Nam liber te conscient to factor tum poen legum odioque civiuda.Lorem ipsum dolor sit er elit lamet, consectetaur cillium adipisicing pecu, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum. Nam liber te conscient to factor tum poen legum odioque civiuda.Lorem ipsum dolor sit er elit lamet, consectetaur cillium adipisicing pecu, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum. Nam liber te conscient to factor tum poen legum odioque civiudaLorem ipsum dolor sit er elit lamet, consectetaur cillium adipisicing pecu, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. erunt mollit anim id est laborum. Nam liber te conscient to factor tum poen legum odioque civiudaLorem ipsum dolor sit er elit lamet, consectetaur cillium adipisicing pecu, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum. Nam liber te conscient to factor tum poen legum odioque civiuda.Lorem ipsum dolor sit er elit lamet, consectetaur cillium adipisicing pecu, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum. Nam liber te conscient to factor tum poen legum odioque civiuda.Lorem ipsum dolor sit er elit lamet, consectetaur cillium adipisicing pecu, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua., uda.-----------------" 
    diaryEntryText.frame.size.width = self.view.frame.width - 40 
    diaryEntryText.frame.size.height = contentSize.height 
    diaryEntryText.frame = CGRect(x:20, y:80, width:self.view.frame.width - 2, height:contentSize.height) 
    diaryEntryText.isScrollEnabled = true 
    diaryEntryText.textAlignment = .justified 

    containerView.addSubview(diaryEntryText) 

    let fixedWidthText = self.view.frame.width - 40 
    diaryEntryText.sizeThatFits(CGSize(width: fixedWidthText, height: CGFloat.greatestFiniteMagnitude)) 
    let newSizeText = diaryEntryText.sizeThatFits(CGSize(width: fixedWidthText, height: CGFloat.greatestFiniteMagnitude)) 
    var newFrameText = diaryEntryText.frame 
    newFrameText.size = CGSize(width: max(newSizeText.width, fixedWidthText), height: newSizeText.height) 
    diaryEntryText.frame = newFrameText 

    self.tagListView = TagListView() 
    tagListView.delegate = self 
    let contentSizeTag = tagListView.frame.size.height 
    let yTag = newSizeText.height + 10 + 80 

    var tagFrame = self.tagListView.frame 
    tagFrame.size.width = self.view.frame.width-2 
    tagFrame.size.height = contentSizeTag 
    tagFrame.origin.x = 20 
    tagFrame.origin.y = yTag 
    tagListView.frame = tagFrame 
    let tagArrayList = ["happy","enjoy","try"] 
    for element in tagArrayList { 
     tagListView.addTag(element) 
    } 
    containerView.addSubview(tagListView) 

    let fixedWidthTag = self.view.frame.width - 40 
    tagListView.sizeThatFits(CGSize(width: fixedWidthTag, height: CGFloat.greatestFiniteMagnitude)) 
    let newSizeTag = diaryEntryText.sizeThatFits(CGSize(width: fixedWidthTag, height: CGFloat.greatestFiniteMagnitude)) 
    var newFrameTag = tagListView.frame 
    newFrameTag.size = CGSize(width: max(newSizeTag.width, fixedWidthTag), height: newSizeTag.height) 
    tagListView.frame = newFrameTag 

    let contentSizeDate = diaryDate.frame.size.height 
    let yDate = yTag + 20 
    diaryDate.text = "HSR Layout, Bangalore" 
    diaryDate.frame = CGRect(x: 20, y: yDate, width: self.view.frame.width - 2, height:contentSizeTag+20) 
    diaryDate.textColor = UIColor.cyan 

    containerView.addSubview(diaryDate) 

    scrollView.addSubview(containerView) 
    self.view.addSubview(scrollView) 


    if #available(iOS 11.0, *) { 

     let top = NSLayoutConstraint.init(item: containerView, attribute: .top, relatedBy: .equal, toItem: self.view.safeAreaLayoutGuide, attribute: .top, multiplier: 1.0, constant: 0.0) 
     let leading = NSLayoutConstraint.init(item: containerView, attribute: .leading, relatedBy: .equal, toItem: self.view, attribute: .leading, multiplier: 1.0, constant: 0.0) 
     let trailing = NSLayoutConstraint.init(item: containerView, attribute: .trailing, relatedBy: .equal, toItem: self.view, attribute: .trailing, multiplier: 1.0, constant: 0.0) 
     let height = NSLayoutConstraint.init(item: containerView, attribute: .height, relatedBy: .equal, toItem: nil, attribute: .notAnAttribute, multiplier: 1.0, constant: 60.0) 

     NSLayoutConstraint.activate([top, leading, trailing, height]) 

    } else { 
     // Fallback on earlier versions 
    } 

    self.scrollView.contentSize = CGSize(width: self.view.frame.size.width, height: yDate + contentSizeDate) 

} 


override func viewDidLayoutSubviews() { 

    super.viewDidLayoutSubviews() 
    scrollView.frame = view.bounds 
    containerView.frame = CGRect(x:0, y:0, width:scrollView.contentSize.width, height:scrollView.contentSize.height) 

/* I tried using this, but doesn't seem to work 

let newSizeText = diaryEntryText.sizeThatFits(CGSize(width: self.view.frame.width - 40, height: CGFloat.greatestFiniteMagnitude)) 
    let yTag = newSizeText.height + 10 + 80 
    let yDate = yTag + 20 
    let contentSizeDate = diaryDate.frame.size.height 

    self.scrollView.contentSize = CGSize(width: self.view.frame.size.width, height: yDate + contentSizeDate) 
    */ 

} 

override func didReceiveMemoryWarning() { 
    super.didReceiveMemoryWarning() 
    // Dispose of any resources that can be recreated. 
} 
} 

Answer 1

あなたは、次のプロパティが欠落している：

スウィフト4.0

diaryDate.showsVerticalScrollIndicator = true 
diaryDate.isScrollEnabled = true 
diaryDate.scrollRangeToVisible(NSMakeRange(0, 0)) 
diaryDate.setContentOffset(CGPoint(x: 0, y: 0), animated: false) 

あなたはまた、YESとしてUserInteractionEnabledを設定する必要があるかもしれません。

出典： https://stackoverflow.com/posts/46882570/revisions