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[已解决]swift中让一个列表的高度随着内容的可视区域增加而增加

iOS crifan 684浏览 0评论

之前实现了一个tableview,和传统的写法一样,最底部是父视图的底部(去除tab高度)

        //3. Today Todo TableView

        initTaskItem()

        self.todoTableView.delegate = self

        self.todoTableView.dataSource = self

        self.todoTableView.tableFooterView = UIView()

        //self.todoTableView.backgroundColor = UIColor.whiteColor()

        self.todoTableView.backgroundColor = UIColor.clearColor()

//        self.todoTableView.estimatedRowHeight = UITableViewAutomaticDimension

        self.todoTableView.registerClass(TaskTableViewCell.self, forCellReuseIdentifier: TaskTableViewCellId)

        self.view.addSubview(self.todoTableView)

        constrain(todoTableView, newView) {todoTableView, newView in

            todoTableView.top == newView.bottom + 10

            todoTableView.left == todoTableView.superview!.left

            todoTableView.right == todoTableView.superview!.right

            //todoTableView.height == HomeNewHeight

            todoTableView.bottom == todoTableView.superview!.bottom – TabBarHeight

//            todoTableView.bottom == todoTableView.superview!.bottom

        }

而初始化了数据initTaskItem后,有了3个row

-》此时,tableview的可视区域,也就是可滚动区域,就只有3行高了:

而即使增加多行,能够滚动的高度,也只有3行高度:

-》此处希望实现,列表的可滚动区域,高度,是随着列表内容的高度去同步增加的

-》这样就不用在有限的高度内滚动列表了

-》而是整个页面的无限高度下,去滚动列表了。

swift tableview add scroll height

infinite scrolling uitableview swift

swift expand uitableview content height

ios – Expand label/cell size based on text size in UITableView Swift – Stack Overflow

ios – Resizing UITableView to fit content – Stack Overflow

去用了:

    override func viewWillLayoutSubviews() {

        super.viewWillLayoutSubviews()

        let todoFrameHeight = self.todoTableView.frame.height

        let todoContentHeight = self.todoTableView.contentSize.height

        gLog.verbose("todoFrameHeight=\(todoFrameHeight), todoContentHeight=\(todoContentHeight)")

        //todoFrameHeight=215.0, todoContentHeight=252.5

        if todoContentHeight > todoFrameHeight {

            let newContentHeight = todoContentHeight – todoFrameHeight

            let oldHomeFrame = self.view.frame

            let newHomeFrame = CGRectMake(oldHomeFrame.origin.x, oldHomeFrame.origin.y, oldHomeFrame.width, oldHomeFrame.height + newContentHeight)

            gLog.verbose("newContentHeight=\(newContentHeight), oldHomeFrame=\(oldHomeFrame), newHomeFrame=\(newHomeFrame)")

            //newContentHeight=37.5, oldHomeFrame=(0.0, 0.0, 320.0, 504.0), newHomeFrame=(0.0, 0.0, 320.0, 541.5)

            self.view.frame = newHomeFrame

        }

    }

没用。

swift tableview scroll with parent view

swift – IOS : Make entire view scrollable, not only subview – Stack Overflow

去调整父视图的contentsize

 结果self.view没有contentsize

swift self view no contentSize

ios – Swift ScrollView – contentSize can’t take a variable Int – Stack Overflow

ios – Cannot set contentSize of an UIScrollView created via loadView – Stack Overflow

ios – Setting contentSize of UIScrollView that is a child view – Stack Overflow

->

好像是,默认的继承了UIViewController的self.view是普通的UIView:

public class UIViewController : UIResponder, NSCoding, UIAppearanceContainer, UITraitEnvironment, UIContentContainer, UIFocusEnvironment {

    public var view: UIView! // The getter first invokes [self loadView] if the view hasn’t been set yet. Subclasses must call super if they override the setter or getter.

@available(iOS 2.0, *)

public class UIView : UIResponder, NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusEnvironment {

    public class func layerClass() -> AnyClass // default is [CALayer class]. Used when creating the underlying layer for the view.

    public init(frame: CGRect)

    public init?(coder aDecoder: NSCoder)

    public var userInteractionEnabled: Bool // default is YES. if set to NO, user events (touch, keys) are ignored and removed from the event queue.

    public var tag: Int // default is 0

    public var layer: CALayer { get } // returns view’s layer. Will always return a non-nil value. view is layer’s delegate

    @available(iOS 9.0, *)

    public func canBecomeFocused() -> Bool // NO by default

    @available(iOS 9.0, *)

    public var focused: Bool { get }

    @available(iOS 9.0, *)

    public class func userInterfaceLayoutDirectionForSemanticContentAttribute(attribute: UISemanticContentAttribute) -> UIUserInterfaceLayoutDirection

    @available(iOS 9.0, *)

    public var semanticContentAttribute: UISemanticContentAttribute

}

不支持scrollView中的contentSize:

public class UIScrollView : UIView, NSCoding {

    public var contentOffset: CGPoint // default CGPointZero

    public var contentSize: CGSize // default CGSizeZero

所以:

看来是要去新建一个scrollView

把当前视图的内容,都放到scrollView中

然后才可以根据子视图tableview的contentsize去更新父scroll视图的contentsize

才可以实现,整个页面的滚动。。

但是又出现:

[未解决]swift中tableview添加到scrollView后无法正常显示

【总结】

然后最后用:

把原先和tableview平级的view,都一股脑的,放到tableview的header view中,即可实现类似的效果了:

滚动tableview话,是整个页面一起滚动的

代码:

import UIKit

import Cartography

let HomeStatisticHeight:CGFloat = 120

let HomeNewHeight:CGFloat = 100

let HomeNewPaddingTop:CGFloat = 10

let HomeVerticalLineColor:UIColor = UIColor.lightGrayColor()

let HomeVerticalLineWidth:CGFloat = 1

let HomeVerticalLinePaddingY:CGFloat = 12

let HomeVerticalLineHeight:CGFloat = HomeStatisticHeight – (2 * HomeVerticalLinePaddingY)

let HomeTodayTodoHeight:CGFloat = 40

let HomeTodayTodoPaddingTop:CGFloat = 10

let HomeTodoTableHeaderHeight:CGFloat =

        HomeStatisticHeight +

        (HomeNewPaddingTop + HomeNewHeight) +

        (HomeTodayTodoPaddingTop + HomeTodayTodoHeight)

class HomeViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {

    //var contentView:UIScrollView

    var statisticView:UIView

    var statisticCustomView:SingleStatisticView

    var statisticReceiveView:SingleStatisticView

    var statisticOrderView:SingleStatisticView

    var newView:UIView

    let todayTodoView:UIView

    var todoTableView:UITableView

    var todoTableHeaderView:UIView

    var taskItemList:[TaskItem]

    init() {

        //self.contentView = UIScrollView()

        self.statisticView = UIView()

        self.statisticCustomView = SingleStatisticView()

        self.statisticReceiveView = SingleStatisticView()

        self.statisticOrderView = SingleStatisticView()

        self.newView = UIView()

        self.todayTodoView = UIView()

        self.todoTableView = UITableView()

        self.todoTableHeaderView = UIView()

        self.taskItemList = [TaskItem]()

        super.init(nibName: nil, bundle: nil)

    }

    override func viewDidLoad() {

        super.viewDidLoad()

        if let tabBarController = self.tabBarController {

            TabBarHeight = tabBarController.tabBar.frame.height //49

        }

        //Today Todo TableView

        initTaskItem()

        self.todoTableView.delegate = self

        self.todoTableView.dataSource = self

        self.todoTableView.tableFooterView = UIView()

//        self.todoTableView.backgroundColor = UIColor.clearColor()

        self.todoTableView.backgroundColor = UIColor.whiteColor()

        self.todoTableView.registerClass(TaskTableViewCell.self, forCellReuseIdentifier: TaskTableViewCellId)

        self.view.addSubview(self.todoTableView)

        constrain(todoTableView) {todoTableView in

            todoTableView.top == todoTableView.superview!.top

            todoTableView.left == todoTableView.superview!.left

            todoTableView.right == todoTableView.superview!.right

            todoTableView.bottom == todoTableView.superview!.bottom – TabBarHeight

        }

        let ScreenWidth:CGFloat = UIScreen.mainScreen().bounds.width

        //todo table header view

        self.todoTableHeaderView.frame = CGRectMake(0, 0, ScreenWidth, HomeTodoTableHeaderHeight)

        self.todoTableHeaderView.backgroundColor = AppBackgoundColor

        self.todoTableView.tableHeaderView = self.todoTableHeaderView

        //1. Today statistics views

        self.statisticView.backgroundColor = UIColor.whiteColor()

        self.todoTableHeaderView.addSubview(self.statisticView)

        constrain(statisticView) {statisticView in

            statisticView.top == statisticView.superview!.top

            statisticView.left == statisticView.superview!.left

            statisticView.right == statisticView.superview!.right

            statisticView.height == HomeStatisticHeight

        }

        let StatisticSubViewWidth:CGFloat = (ScreenWidth – (2 * HomeVerticalLineWidth))/3

        self.statisticCustomView = SingleStatisticView(todayNumber: 10, title: "今日客户", monthToNowNumber: 32)

        self.statisticView.addSubview(statisticCustomView)

        constrain(statisticCustomView) {statisticCustomView in

            statisticCustomView.top == statisticCustomView.superview!.top

            statisticCustomView.left == statisticCustomView.superview!.left

            statisticCustomView.width == StatisticSubViewWidth

            statisticCustomView.bottom == statisticCustomView.superview!.bottom

        }

        let verticalLineView1:UIView = UIView(frame: CGRectMake(StatisticSubViewWidth, HomeVerticalLinePaddingY, HomeVerticalLineWidth, HomeVerticalLineHeight))

        verticalLineView1.backgroundColor = HomeVerticalLineColor

        self.statisticView.addSubview(verticalLineView1)

        self.statisticReceiveView = SingleStatisticView(todayNumber: 6, title: "今日接收", monthToNowNumber: 23)

        self.statisticView.addSubview(statisticReceiveView)

        constrain(statisticReceiveView, statisticCustomView) {statisticReceiveView, statisticCustomView in

            statisticReceiveView.top == statisticReceiveView.superview!.top

            statisticReceiveView.left == statisticCustomView.right

            statisticReceiveView.width == StatisticSubViewWidth

            statisticReceiveView.bottom == statisticReceiveView.superview!.bottom

        }

        let verticalLineView2:UIView = UIView(frame: CGRectMake((StatisticSubViewWidth * 2) + HomeVerticalLineWidth, HomeVerticalLinePaddingY, HomeVerticalLineWidth, HomeVerticalLineHeight))

        verticalLineView2.backgroundColor = HomeVerticalLineColor

        self.statisticView.addSubview(verticalLineView2)

        self.statisticOrderView = SingleStatisticView(todayNumber: 8, title: "今日订单", monthToNowNumber: 68)

        self.statisticView.addSubview(statisticOrderView)

        constrain(statisticOrderView, statisticReceiveView) {statisticOrderView, statisticReceiveView in

            statisticOrderView.top == statisticOrderView.superview!.top

            statisticOrderView.left == statisticReceiveView.right

            statisticOrderView.width == StatisticSubViewWidth

            statisticOrderView.bottom == statisticOrderView.superview!.bottom

        }

        //2. New/add views

        self.newView.backgroundColor = UIColor.whiteColor()

        self.todoTableHeaderView.addSubview(self.newView)

        constrain(newView, statisticView) {newView, statisticView in

            newView.top == statisticView.bottom + HomeNewPaddingTop

            newView.left == newView.superview!.left

            newView.right == newView.superview!.right

            newView.height == HomeNewHeight

        }

        let NewButtonWidth:CGFloat = ScreenWidth/3

        //2.1 new customer

        let newCustomerButton:UIButton = CreateNewButton(newImage: UIImage(named: "new_customer")!, newTitle: "新增客户")

        newCustomerButton.addTarget(self, action: #selector(self.createCustomer(_:)), forControlEvents: UIControlEvents.TouchUpInside)

        self.newView.addSubview(newCustomerButton)

        constrain(newCustomerButton) {newCustomerButton in

            newCustomerButton.top == newCustomerButton.superview!.top

            newCustomerButton.left == newCustomerButton.superview!.left

            newCustomerButton.width == NewButtonWidth

            newCustomerButton.bottom == newCustomerButton.superview!.bottom

        }

        //2.2 new task

        let newTaskButton:UIButton = CreateNewButton(newImage: UIImage(named: "new_task")!, newTitle: "新增任务")

        newTaskButton.addTarget(self, action: #selector(self.createTask(_:)), forControlEvents: UIControlEvents.TouchUpInside)

        self.newView.addSubview(newTaskButton)

        constrain(newTaskButton, newCustomerButton) {newTaskButton, newCustomerButton in

            newTaskButton.top == newTaskButton.superview!.top

            newTaskButton.left == newCustomerButton.right

            newTaskButton.width == NewButtonWidth

            newTaskButton.bottom == newTaskButton.superview!.bottom

        }

        //2.3 new memo

        let newMemoButton:UIButton = CreateNewButton(newImage: UIImage(named: "new_memo")!, newTitle: "新增备忘")

        newMemoButton.addTarget(self, action: #selector(self.createMemo(_:)), forControlEvents: UIControlEvents.TouchUpInside)

        self.newView.addSubview(newMemoButton)

        constrain(newMemoButton, newTaskButton) {newMemoButton, newTaskButton in

            newMemoButton.top == newMemoButton.superview!.top

            newMemoButton.left == newTaskButton.right

            newMemoButton.width == NewButtonWidth

            newMemoButton.bottom == newMemoButton.superview!.bottom

        }

        //3. today todo label

        let curTodoNumber:Int = 6

        self.todayTodoView.backgroundColor = UIColor.clearColor()

//        self.todayTodoView.backgroundColor = UIColor.greenColor()

        self.todoTableHeaderView.addSubview(self.todayTodoView)

        constrain(todayTodoView, newView) {todayTodoView, newView in

            todayTodoView.top == newView.bottom + HomeTodayTodoPaddingTop

            todayTodoView.left == todayTodoView.superview!.left

            todayTodoView.width == todayTodoView.superview!.width

            todayTodoView.height == HomeTodayTodoHeight

        }

        let todoLabel:UILabel = UILabel()

//        todoLabel.backgroundColor = UIColor.brownColor()

        todoLabel.text = "今日代办"

        todoLabel.textAlignment = .Left

        todoLabel.font = UIFont.systemFontOfSize(14)

        self.todayTodoView.addSubview(todoLabel)

        constrain(todoLabel) {todoLabel in

            todoLabel.top == todoLabel.superview!.top

            todoLabel.left == todoLabel.superview!.left + 8

            todoLabel.bottom == todoLabel.superview!.bottom

        }

        let todoNumLabel:UILabel = UILabel()

        todoNumLabel.text = "(\(curTodoNumber))"

        todoNumLabel.textAlignment = .Left

        todoNumLabel.textColor = UIColor.redColor()

        todoNumLabel.font = todoLabel.font

        self.todayTodoView.addSubview(todoNumLabel)

        constrain(todoNumLabel, todoLabel) {todoNumLabel, todoLabel in

            todoNumLabel.top == todoNumLabel.superview!.top

            todoNumLabel.left == todoLabel.right + 4

            todoNumLabel.bottom == todoNumLabel.superview!.bottom

        }

        //todoNumLabel.text = "(\(23))"

    }

效果:

滚动时,是整个页面一起滚动:

转载请注明:在路上 » [已解决]swift中让一个列表的高度随着内容的可视区域增加而增加

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