我需要更改可扩展表格视图单元格中的背景颜色。我所做的是，我在一个单元格中放置了三个UIViews。选择单元格中的第一个视图时，将展开剩余的两个视图。这是工作。现在，我需要在选择单元格时单独更改第一个视图的颜色。使用以下代码，它更改单元格中第三个视图的颜色。但我希望第一个视图更改并保持橙色，直到选中另一个单元格。有人可以帮忙吗？
import UIKit
import CoreData
class NewTableViewController: UIViewController,UITableViewDataSource,UITableViewDelegate{
let viewObj = CustomCellTableViewCell()
let managedObjectContext = (UIApplication.shared.delegate as! AppDelegate).persistentContainer.viewContext
@IBOutlet weak var tableView: UITableView!
var selectedIndex = -1
override func viewDidLoad() {
super.viewDidLoad()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return totalCustomer().0
}
func tableView(_ tableView: UITableView,heightForRowAt indexPath: IndexPath) ->CGFloat
{
if(selectedIndex == indexPath.row) {
return 160;
}
else {
return 40;
}
}
func tableView(_ tableView: UITableView,cellForRowAt indexPath: IndexPath) ->UITableViewCell{
print("entered")
let cellIdentifier = "Cell"
let cell = tableView.dequeueReusableCell(withIdentifier: cellIdentifier) as! CustomCellTableViewCell
let row = indexPath.row
var nameArray = [String]()
nameArray = totalCustomer().1
cell.firstViewLabel.text = nameArray[row]
var emailArray = [String]()
emailArray = totalCustomer().2
cell.secondViewLabel.text = emailArray[row]
return cell
}
func tableView(_ tableView: UITableView, didHighlightRowAt indexPath: IndexPath) {
let cell = tableView.cellForRow(at: indexPath)
cell?.contentView.backgroundColor = UIColor.orange
cell?.backgroundColor = UIColor.orange
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath)
{
if(selectedIndex == indexPath.row) {
selectedIndex = -1
} else {
selectedIndex = indexPath.row
}
self.tableView.beginUpdates()
self.tableView.reloadRows(at: [indexPath as IndexPath], with: UITableViewRowAnimation.automatic)
self.tableView.endUpdates()
}
func totalCustomer()->(Int,[String],[String])
{
let request: NSFetchRequest<Customers> = Customers.fetchRequest()
var customerList = [String]()
var customerEmailList = [String]()
var customerCount = 0
do {
let results = try managedObjectContext.fetch(request as! NSFetchRequest<NSFetchRequestResult>)
print(results.count)
if results.count > 0
{
for _ in 0..<results.count
{
let match = results[customerCount] as! NSManagedObject
print(match.value(forKey: "name") as! String)
customerList.append(match.value(forKey: "name") as! String)
customerEmailList.append(match.value(forKey: "email") as! String)
customerCount = customerCount + 1
}
}
else
{
//statusLabel.isHidden = false
}
}
catch let error
{
print("Label\(error.localizedDescription)")
}
print(customerCount)
return (customerCount,customerList,customerEmailList)
}
}
import UIKit
class CustomCellTableViewCell: UITableViewCell {
@IBOutlet weak var firstView: UIView!
@IBOutlet weak var firstViewLabel: UILabel!
@IBOutlet weak var secondView: UIView!
@IBOutlet weak var secondViewLabel: UILabel!
@IBOutlet weak var thirdView: UIView!
@IBOutlet weak var thirdViewLabel: UILabel!
@IBOutlet weak var secondHeightConstraint: NSLayoutConstraint!
@IBOutlet weak var thirdHeightConstraint: NSLayoutConstraint!
override func awakeFromNib() {
super.awakeFromNib()
secondView.layer.borderWidth = 0.1
secondView.layer.borderColor = UIColor.black.cgColor
thirdView.layer.borderWidth = 0.1
thirdView.layer.borderColor = UIColor.black.cgColor
}
override func setSelected(_ selected: Bool, animated: Bool) {
super.setSelected(selected, animated: animated)
}
var showsDetails = false {
didSet {
secondHeightConstraint.priority = showsDetails ? 250 : 999
thirdHeightConstraint.priority = showsDetails ? 250 : 999
}
}
}
答案 0 :(得分：2)
考虑到您将所选的open FSharp.Data
[<Literal>]
let JsonPath = "https://facebook.github.io/react-native/movies.json"
type Car = { Title:string ; ReleaseYear:int }
type MovieProvider = JsonProvider<JsonPath>
let getCars() =
async {
let! result = MovieProvider.AsyncLoad JsonPath
return result.Movies
|> Array.toList
|> List.map (fun m -> { Title=m.Title; ReleaseYear=m.ReleaseYear })
}
存储在IndexPath.row并且selectedIndex是公开的，并且您在选择单元格后重新加载firstView，请输入以下附加代码UITableView方法应该足够了。
cellForRowAt答案 1 :(得分：1)
将颜色更改登录名移至cellForRowAt方法。
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) ->UITableViewCell{
if self.selectedIndex == indexPath.row {
cell.firstView.backgroundColor = UIColor.orange // Highlight color
}else {
cell.firstView.backgroundColor = UIColor.blue // Original color
}
}
请记住也要更新上一行以删除背景颜色：
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath)
{
previousIndex = selectedIndex
if(selectedIndex == indexPath.row) {
selectedIndex = -1
} else {
selectedIndex = indexPath.row
}
var myPrevIP = IndexPath(row: previousIndex, section: indexPath.section)
var indexPathArray: [Any] = [myPrevIP, indexPath]
self.tableView.beginUpdates()
self.tableView.reloadRows(at:indexPathArray,with: UITableViewRowAnimation.automatic)
self.tableView.endUpdates()
}
答案 2 :(得分：1)
UITableView已经实施了选择机制。
在您的单元格中，您可以控制背景颜色：
class MyCustomCell: UITableViewCell {
@IBInspectable var normalColor: UIColor = UIColor.white
@IBInspectable var highlightedColor: UIColor = UIColor.red
@IBInspectable var selectedColor: UIColor = UIColor.blue
override func setHighlighted(_ highlighted: Bool, animated: Bool) {
super.setHighlighted(highlighted, animated: animated)
refreshBackground()
}
override func setSelected(_ selected: Bool, animated: Bool) {
super.setSelected(selected, animated: animated)
refreshBackground()
}
func refreshBackground() {
if isHighlighted {
backgroundColor = highlightedColor
}
else if isSelected {
backgroundColor = selectedColor
}
else {
backgroundColor = normalColor
}
}
}
在单元格中使用@IBInspectable，您可以直接在故事板中配置颜色。