问题
sorry,I have a problem.I don't use storyBoard.
I want to make a view like this.
photo by terenceLuffy/AppStoreStyleHorizontalScrollView
but I try to do this. Finlly,scrollView just show last button like this.
This is code:
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)
}
please help me. Thanks all!
回答1:
I have tried your code and changed it a bit. It works as expected, unless you have something other going on:
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)
}
回答2:
There are two ways of achieving it :) One the hard way using scrollView and calculating offset and setting views programmatically on ScrollView as subView else use CollectionView
Step 1:
Add a UICollectionView to storyboard, set the height of collectionView to match your requirement :)
Step 2
Create a cell, size of which depends on your requirement. I have created a cell with background colour orange/pink. Added a label on it to show your number.
Step 3:
Set the reusable cell identifier to the cell and set its class as well :)
Step 4 :
Set collectionView scroll direction to horizontal :)
Step 5:
Now implement collectionView delegates and data source methods :)
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;
}
}
Thats all :)
Final O/P
Look at collectionView with cell ABCD :D
Additional Info
If you are dragging a collectionView on UIViewController, you might see that the collectionView leaves a gap at the top which you can solve by unchecking Adjust ScrollView Insets of ViewController :)
回答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)
}
}
回答4:
Its easy with minimal use of storyboard. You can avoid that rather easily. All you need are:
- Scroll view
- Horizontal stack view
- Set the constraints of the above as shown in the project
- A number of buttons - as many view controllers that need to be displayed.
- A container view - this will be the view that will hold the active view controller.
Please refer to this project for some sample code: https://github.com/equitronix/horizontalScrollMenu
回答5:
//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 = []
//Call 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)
}
}
}
回答6:
Doing it from the storyboard using scroll view and stack views makes this a very simple solution. Along with a bunch of sub view controllers and transitions. I have posted sample code on GitHub. Please take a look here:
https://github.com/equitronix/horizontalScrollMenu
Let me know if this works.
来源：https://stackoverflow.com/questions/41279356/how-to-make-horizontal-scrollview-and-some-buttons-in-it-programming