如何制作Horizontal scrollView和其中的一些按钮（编程）

Question

抱歉，我有一个 problem.I 不要使用故事板。

我想做一个这样的视图
photo by terenceLuffy/AppStoreStyleHorizontalScrollView

但我尝试这样做。最后，scrollView 只是像这样显示最后一个按钮。

这是代码：

var scView:UIScrollView = UIScrollView()
var buttonPadding:CGFloat = 10
var xOffset:CGFloat = 10


scView.backgroundColor = UIColor.blue
scView.translatesAutoresizingMaskIntoConstraints = false


func viewDidLoad() {

for i in 0 ... 10 {

    let button = UIButton()

    button.tag = i
    button.backgroundColor = UIColor.darkGray
    button.setTitle("\(i)", for: .normal)
    button.addTarget(self, action: #selector(btnTouch), for: UIControlEvents.touchUpInside)

    button.frame = CGRect(x: xOffset, y: CGFloat(buttonPadding), width: 70, height: 30)

    xOffset = xOffset + CGFloat(buttonPadding) + button.frame.size.width
    scView.addSubview(button)


}

scView.contentSize = CGSize(width: xOffset, height: scView.frame.height)

}

请帮帮我。谢谢大家！

Answer 1

我试过你的代码并做了一些修改。它按预期工作，除非你有其他事情发生：

var scView:UIScrollView!
let buttonPadding:CGFloat = 10
var xOffset:CGFloat = 10

override func viewDidLoad() {
    super.viewDidLoad()
    scView = UIScrollView(frame: CGRect(x: 0, y: 120, width: view.bounds.width, height: 50))
    view.addSubview(scView)

    scView.backgroundColor = UIColor.blue
    scView.translatesAutoresizingMaskIntoConstraints = false

    for i in 0 ... 10 {
        let button = UIButton()
        button.tag = i
        button.backgroundColor = UIColor.darkGray
        button.setTitle("\(i)", for: .normal)
        //button.addTarget(self, action: #selector(btnTouch), for: UIControlEvents.touchUpInside)

        button.frame = CGRect(x: xOffset, y: CGFloat(buttonPadding), width: 70, height: 30)

        xOffset = xOffset + CGFloat(buttonPadding) + button.frame.size.width
        scView.addSubview(button)


    }

    scView.contentSize = CGSize(width: xOffset, height: scView.frame.height)
}

Answer 2

有两种实现方法:) 一种困难的方法是使用 scrollView 并计算偏移量并以编程方式在 ScrollView 上将视图设置为子视图，否则使用 CollectionView

第 1 步：

将 UICollectionView 添加到故事板，设置 collectionView 的高度以满足您的要求:)

步骤 2

创建一个单元格，其大小取决于您的要求。我创建了一个背景色为 orange/pink 的单元格。在上面添加了一个标签以显示您的号码。

第 3 步：

将可重复使用的单元标识符设置为单元并设置其 class :)

第 4 步：

将 collectionView 滚动方向设置为水平:)

第 5 步：

现在实现 collectionView 委托和数据源方法:)

extension ViewController : UICollectionViewDataSource,UICollectionViewDelegate {
    func numberOfSections(in collectionView: UICollectionView) -> Int {
        return 1
    }

    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return 10
    }

    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "myCell", for: indexPath) as! MyCollectionViewCell
        cell.myLabel.text = "ABCD"
        return cell;
    }
}

就这些:)

决赛O/P

查看带有单元格 ABCD 的 collectionView :D

附加信息

如果您在 UIViewController 上拖动 collectionView，您可能会看到 collectionView 在顶部留下一个空隙，您可以通过取消选中 Adjust ScrollView Insets of ViewController 来解决这个问题:)

Answer 3

import UIKit

class ViewController: UIViewController {

    var imageStrings:[String] = []
     var myScrollView:UIScrollView!


    @IBOutlet weak var previewView: UIImageView!



    var scrollWidth : CGFloat = 320
    let scrollHeight : CGFloat = 100
    let thumbNailWidth : CGFloat = 80
    let thumbNailHeight : CGFloat = 80
    let padding: CGFloat = 10

    override func viewDidLoad() {
        super.viewDidLoad()

        imageStrings = ["image01","image02","image03","image04","image05","image06","image07","image08"]

        scrollWidth = self.view.frame.width

        //setup scrollView
        myScrollView = UIScrollView(frame: CGRectMake(0, self.view.frame.height - scrollHeight, scrollWidth, scrollHeight))

        //setup content size for scroll view
        let contentSizeWidth:CGFloat = (thumbNailWidth + padding) * (CGFloat(imageStrings.count))
        let contentSize = CGSize(width: contentSizeWidth ,height: thumbNailHeight)

        myScrollView.contentSize = contentSize
        myScrollView.autoresizingMask = UIViewAutoresizing.FlexibleWidth


        for(index,value) in enumerate(imageStrings) {
            var button:UIButton = UIButton.buttonWithType(.Custom) as! UIButton
            //calculate x for uibutton
            var xButton = CGFloat(padding * (CGFloat(index) + 1) + (CGFloat(index) * thumbNailWidth))
            button.frame = CGRectMake(xButton,padding, thumbNailWidth, thumbNailHeight)
            button.tag = index

            let image = UIImage(named:value)
            button.setBackgroundImage(image, forState: .Normal)
            button.addTarget(self, action: Selector("changeImage:"), forControlEvents: .TouchUpInside)

            myScrollView.addSubview(button)
        }
        previewView.image = UIImage(named: imageStrings[0])
        self.view.addSubview(myScrollView)
    }
        // Do any additional setup after loading the view, typically from a nib.


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

    func changeImage(sender:UIButton){
        let name = imageStrings[sender.tag]
        previewView.image = UIImage(named: name)
    }


}

Answer 4

    //make that variable gloabl
   let button = UIButton.init(type: .custom)
    var arrMmenu :  NSMutableArray = []
    var  selectedIndex : Int = 0
     @IBOutlet weak var btnScrollView: UIScrollView!
    var lineArray : NSMutableArray = []
    var buttonArray : NSMutableArray = []

//调用buttonCreated()

  //MARK:- Create an Horizontral LayOut
func buttonCreated()
{

    btnScrollView.contentSize.width = 0
 namesOfMenu = ["GMC","GPA","GTL"]
    var scrollwidth: CGFloat = 10.0

    for j in 0..<namesOfMenu.count
    {
        let name = namesOfMenu[j] as! String
        let size : CGSize? = name.size(withAttributes : [NSAttributedStringKey.font : UIFont.systemFont(ofSize: 10.0)])


        let textsize = CGSize(width : CGFloat(ceilf(Float(size!.width))), height : CGFloat(ceilf(Float(size!.height))))

        var strikwidth : CGFloat = textsize.width
        strikwidth = textsize.width + 30
        let frame = CGRect(x: scrollwidth , y : CGFloat(7),width :CGFloat(strikwidth + 20) , height :CGFloat(20))
        let frameLine = CGRect(x: scrollwidth , y : CGFloat(30),width :CGFloat(strikwidth + 20) , height :CGFloat(2))
        let button = UIButton(type: .custom)
        let line = UIView()
        line.frame = frameLine
        button.tag = j
        view.tag = j
        button.frame = frame
        line .backgroundColor = UIColor.red
        button.backgroundColor = UIColor.red
        button.setTitleColor(UIColor.white, for: UIControlState.normal)
        button.layer.borderColor = UIColor.white.cgColor
        button.titleLabel?.textAlignment = .center
        button.addTarget(self, action: #selector(self.buttonEvent(_:)), for: .touchUpInside)
        button.setTitle(name, for : .normal)
        scrollwidth = scrollwidth + strikwidth + 30
        let strofMenu = namesOfMenu[selectedIndex] as! String

        if (j == selectedIndex)
        {

            if(strofMenu == "GMC")
            {
                // apicall()
            }

            line.backgroundColor = hexStringToUIColor(hex: "#3174C7")
            button.backgroundColor = UIColor.clear

            button.setTitleColor(hexStringToUIColor(hex: "#3174C7"), for: UIControlState.normal)


        }else
        {
            line.backgroundColor = UIColor.clear
            button.backgroundColor = UIColor.clear

            button.setTitleColor(MyConstant.Color.dark_gray_shade, for: UIControlState.normal)

        }
        button.titleLabel?.font =  MyConstant.fontApp.Regular

        buttonArray.add(button)

        lineArray.add(line)

        btnScrollView.addSubview(button)

        btnScrollView.addSubview(line)

    }

    btnScrollView.contentSize = CGSize(width : CGFloat(scrollwidth), height :  CGFloat(40.0))

    btnScrollView.isPagingEnabled = false

    btnScrollView.showsHorizontalScrollIndicator = false

    btnScrollView.showsVerticalScrollIndicator = false
}

//MARK:- Button Event

@objc func buttonEvent(_ sender : UIButton)

{

    let index = sender.tag

    selectedIndex = index

    let getRepoName = namesOfMenu[index] as! String

    print(getRepoName)


    for i in 0..<buttonArray.count

    {

        let buttonone : UIButton = (buttonArray[i] as! UIButton)

        let line : UIView  = (lineArray[i]) as! UIView

        if i == selectedIndex
        {
            buttonone.backgroundColor = UIColor.clear

            line.backgroundColor = hexStringToUIColor(hex: "#3174C7")

            buttonone.setTitleColor(hexStringToUIColor(hex: "#3174C7"), for: .normal)
            //
            //                if(getRepoName == "GMC")
            //                {
            //                    clickedCellIndexes.add(0)
            //
            //                    arrmutablefordata.removeAllObjects()
            //                    tblhome.reloadData()
            //                    apicall()
            //                }


            //buttonone.titleLabel
        }else
        {
            buttonone.backgroundColor = UIColor.clear

            line.backgroundColor = UIColor.clear

            buttonone.setTitleColor(MyConstant.Color.dark_gray_shade, for: .normal)

        }





    }

}

Answer 5

只需使用最少的情节提要即可轻松完成。你可以很容易地避免这种情况。您只需要：

滚动视图
水平堆栈视图
如项目所示设置上面的约束条件
按钮的数量 - 需要显示的视图控制器的数量。
容器视图 - 这将是包含活动视图控制器的视图。

示例代码请参考本项目： https://github.com/equitronix/horizontalScrollMenu

Answer 6

使用滚动视图和堆栈视图从情节提要中执行此操作使这是一个非常简单的解决方案。以及一堆子视图控制器和转换。我已经在 GitHub 上发布了示例代码。请看这里：

https://github.com/equitronix/horizontalScrollMenu

让我知道这是否可行。

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