什么时候selectCard被调用，通过注释掉我发现的代码的各个部分，只有在函数中更新viewDidLayoutSubviews时才被调用。只有当我们有 时才会更新分数。为什么会这样？scorecheckIfCardsMatchmatchedCards
我想viewDidLayoutSubviews每次selectCard都叫。我注意到如果我添加CardTable.addSubview(grid)到我的resetTable函数中，而不是viewDidLayoutSubviews每次selectCard在分数更改时调用 EXECPT。
这里发生了什么，我如何确保viewDidLayoutSubviews在每次选择卡时都被调用？
// Score
@IBOutlet weak var scoreLabel: UILabel! {
didSet {
scoreLabel.text = "Score: \(score)"
}
}
private var score = 0 {
didSet {
scoreLabel.text = "Score: \(score)"
}
}
func selectCard(card: Card) {
// must deal more cards if we have a match first
if !matched.isEmpty && !game.cards.isEmpty {
print("must deal more cards if we have a match first")
resetTable()
return
}
// deal no longer possible
if !matched.isEmpty && game.cards.isEmpty {
print("deal no longer possible")
clearAndDeal()
}
// reset any mismatched card styles
if !misMatched.isEmpty {
print("reset any mismatched card styles")
resetMisMatchedStyle()
}
// select or deselect card
game.select(card: card)
if let idx = visibleCards.index(of: card){
visibleCards[idx].state = .selected
}
// check for match
checkIfCardsMatch()
// resetTable
resetTable()
}
private func resetTable(){
grid = CardTableView(frame: CardTable.bounds, cardsInPlay: visibleCards)
grid.delegate = self
}
private func checkIfCardsMatch(){
if let matchedCards = game.matchedCards() {
print("MATCHED!", matchedCards)
matched = matchedCards
game.clearSelectedCards()
score += 3
// set visible cards to matched
for card in matched {
if let idx = visibleCards.index(of: card){
visibleCards[idx].state = .matched
}
}
}else {
if game.selectedCards.count == 3 {
print("no match")
misMatched = game.selectedCards
game.clearSelectedCards()
score -= 5
for card in misMatched {
if let idx = visibleCards.index(of: card){
visibleCards[idx].state = .misMatched
}
}
}
}
}
整个文件：
//
// ViewController.swift
// Set
//
import UIKit
class ViewController: UIViewController, CardTableViewDelegate {
func delegateCardTap(card: Card){
print("called in view controller")
selectCard(card: card)
}
// Game
private var game = SetGame()
private lazy var grid = CardTableView(frame: CardTable.bounds, cardsInPlay: visibleCards)
// table to place all cards
@IBOutlet weak var CardTable: UIView! {
didSet {
// set up buttons with 12 cards
initalDeal()
}
}
@IBAction func newGame(_ sender: UIButton) {
score = 0
game = SetGame()
visibleCards.removeAll()
matched.removeAll()
misMatched.removeAll()
dealMoreButton.isEnabled = true
dealMoreButton.setTitleColor(#colorLiteral(red: 0.231372549, green: 0.6, blue: 0.9882352941, alpha: 1), for: .normal)
initalDeal()
grid.cards = visibleCards
}
override func viewDidLoad() {
grid.delegate = self
}
override func viewDidLayoutSubviews() {
print("viewDidLayoutSubviews")
super.viewDidLayoutSubviews()
// reset frame when device rotates
grid.frame = CardTable.bounds
// add cards to the card table
CardTable.addSubview(grid)
}
// Cards
private var visibleCards = [Card]()
// Score
@IBOutlet weak var scoreLabel: UILabel! {
didSet {
scoreLabel.text = "Score: \(score)"
}
}
private var score = 0 {
didSet {
scoreLabel.text = "Score: \(score)"
}
}
// Deal
@IBOutlet weak var dealMoreButton: UIButton!
@IBAction func deal(_ sender: UIButton) {
// have a match and cards available to deal
if !matched.isEmpty && !game.cards.isEmpty {
//TODO: fix this for new UI
clearAndDeal()
} else {
dealThreeMore()
}
// disable if we run out of cards
if game.cards.isEmpty {
disable(button: sender)
}
grid.cards = visibleCards
}
private func dealThreeMore(){
if visibleCards.count < game.cardTotal {
for _ in 0..<3 {
if let card = game.drawCard() {
// add more visible cards
visibleCards.append(card)
} else {
print("ran out of cards in the deck!")
}
}
}
}
private func disable(button sender: UIButton){
sender.isEnabled = false
sender.setTitleColor(#colorLiteral(red: 0.5, green: 0.5, blue: 0.5, alpha: 1), for: .normal)
}
private func clearAndDeal(){
print("in clearAndDeal")
//TODO: rewrite me
for card in matched {
if let index = visibleCards.index(of: card){
// remove matched styles
// draw new card
if let newCard = game.drawCard() {
// swap with old card
replace(old: index, with: newCard)
} else {
// ran out of cards in the deck!
hideButton(by: index)
}
}
}
matched.removeAll()
}
private var allCardsMatched: Bool {
let cards = visibleCards.filter({card in
// if let index = visibleCards.index(of: card){
//// return cardButtons[index].isEnabled
// }
return false
})
return cards.count == 3
}
private var misMatched = [Card]()
private var matched = [Card]()
func selectCard(card: Card) {
// must deal more cards if we have a match first
if !matched.isEmpty && !game.cards.isEmpty {
print("must deal more cards if we have a match first")
resetTable()
return
}
// deal no longer possible
if !matched.isEmpty && game.cards.isEmpty {
print("deal no longer possible")
clearAndDeal()
}
// reset any mismatched card styles
if !misMatched.isEmpty {
print("reset any mismatched card styles")
resetMisMatchedStyle()
}
// select or deselect card
game.select(card: card)
if let idx = visibleCards.index(of: card){
visibleCards[idx].state = .selected
}
// check for match
checkIfCardsMatch()
// resetTable
resetTable()
}
private func resetTable(){
grid = CardTableView(frame: CardTable.bounds, cardsInPlay: visibleCards)
grid.delegate = self
}
private func checkIfCardsMatch(){
if let matchedCards = game.matchedCards() {
print("MATCHED!", matchedCards)
matched = matchedCards
game.clearSelectedCards()
score += 3
// set visible cards to matched
for card in matched {
if let idx = visibleCards.index(of: card){
visibleCards[idx].state = .matched
}
}
}else {
if game.selectedCards.count == 3 {
print("no match")
misMatched = game.selectedCards
game.clearSelectedCards()
score -= 5
for card in misMatched {
if let idx = visibleCards.index(of: card){
visibleCards[idx].state = .misMatched
}
}
}
}
}
private func initalDeal(){
for _ in 0..<12 {
if let card = game.drawCard() {
visibleCards.append(card)
}
}
}
private func removeStyleFrom(button: UIButton){
button.layer.backgroundColor = #colorLiteral(red: 1.0, green: 1.0, blue: 1.0, alpha: 1.0)
}
private func resetMisMatchedStyle(){
for card in misMatched {
if let idx = visibleCards.index(of: card){
visibleCards[idx].state = nil
}
}
misMatched.removeAll()
}
private func replace(old index: Int, with newCard: Card){
visibleCards[index] = newCard
// style(a: cardButtons[index], by: newCard)
}
private func hideButton(by index: Int){
// let button = cardButtons[index]
// button.setAttributedTitle(NSAttributedString(string:""), for: .normal)
// button.backgroundColor = #colorLiteral(red: 1, green: 1, blue: 1, alpha: 0)
// button.isEnabled = false
}
private func styleTouched(button: UIButton, by card: Card) {
if game.selectedCards.contains(card) {
button.layer.backgroundColor = #colorLiteral(red: 0.9848672538, green: 0.75109528, blue: 1, alpha: 1)
}else {
removeStyleFrom(button: button)
}
}
}