我试图创建一个应用，其中以随机顺序显示随机颜色。挑战应该是记住他们的顺序，然后按正确的顺序单击下面的按钮。现在，当我尝试使用数组检查顺序时，出现错误“线程1：致命错误，索引超出范围”。我是编码和应用程序开发的新手，但我想必须从某个地方开始。非常感谢您的帮助：）
//
// ContentView.swift
// randomColorAufKnopfdruck
//
// Created by Jeff on 13.05.20.
// Copyright © 2020 Jeff. All rights reserved.
//
import SwiftUI
class TestColor{
var chosenColor = Color.black
var colors = [Color.green, .blue, .red, .pink, .orange, .purple]
var id: Int
var numbers = [0,1,2,3,4,5]
init(){
id = numbers.randomElement()!
}
func generateRDMColor() -> Color{
if id<=5{
switch id{
case 0:
chosenColor = colors[id]
case 1:
chosenColor = colors[id]
case 2:
chosenColor = colors[id]
case 4:
chosenColor = colors[id]
case 5:
chosenColor = colors[id]
default:
break;
}
}
return chosenColor
}
}
class ColorButtons{
var colorRepresenting: Color
enum Colors
{
case red
case blue
case green
case purple
case orange
case pink
}
init(color: Colors){
switch color{
case .red:
colorRepresenting = Color.red
case .blue:
colorRepresenting = Color.blue
case .green:
colorRepresenting = Color.green
case .purple:
colorRepresenting = Color.purple
case .orange:
colorRepresenting = Color.orange
case .pink:
colorRepresenting = Color.pink
}
}
}
public var outputColor = Color.black
public var numberCache = [0]
public var cache = 0
public var score = 0
struct ContentView: View {
@State private var didTapstart:Bool = false
var body: some View {
VStack{
Spacer()
RoundedRectangle(cornerRadius: 3)
.foregroundColor(self.didTapstart ? outputColor : outputColor)
Spacer()
HStack{
Spacer()
Button(action: {
if self.didTapstart == false{
self.didTapstart = true
}
else{
self.didTapstart = false
}
outputColor = TestColor.init().generateRDMColor()
if numberCache.count <= 1{
switch outputColor{
case .green:
numberCache[0] = 0
case .blue:
numberCache[0] = 1
case .red:
numberCache[0] = 2
case .pink:
numberCache[0] = 3
case .orange:
numberCache[0] = 4
case .purple:
numberCache[0] = 5
default:
numberCache[0] = 0
}
}
else if numberCache.count > 1 && numberCache.count <= 6{
switch outputColor{
case .green:
numberCache.append(0)
case .blue:
numberCache.append(1)
case .red:
numberCache.append(2)
case .pink:
numberCache.append(3)
case .orange:
numberCache.append(4)
case .purple:
numberCache.append(5)
default:
numberCache.removeAll()
numberCache[0] = 0
}
}
else{
numberCache.removeAll()
outputColor = Color.gray
}
}) {
Text("press me")
}
Spacer()
}
Spacer()
Text(String(score))
HStack{
Spacer()
Button(action: {
if cache <= 6{
cache += 1
}
else{
cache = 0
}
if numberCache[cache] == 0{
score += 1
}
else{
score = 0
}
}) {
RoundedRectangle(cornerRadius: 3)
.foregroundColor(ColorButtons.init(color: .green).colorRepresenting)
}
Spacer()
Button(action: {
if cache <= 5{
cache += 1
}
else{
cache = 0
}
if numberCache[cache] == 1{
score += 1
}
else{
score = 0
}
}) {
RoundedRectangle(cornerRadius: 3)
.foregroundColor(ColorButtons.init(color: .blue).colorRepresenting)
}
Spacer()
Button(action: {
if cache <= 5{
cache += 1
}
else{
cache = 0
}
if numberCache[cache] == 2{
score += 1
}
else{
score = 0
}
}) {
RoundedRectangle(cornerRadius: 3)
.foregroundColor(ColorButtons.init(color: .red).colorRepresenting)
}
Spacer()
}
HStack{
Spacer()
Button(action: {
if cache <= 5{
cache += 1
}
else{
cache = 0
}
if numberCache[cache] == 3{
score += 1
}
else{
score = 0
}
}) {
RoundedRectangle(cornerRadius: 3)
.foregroundColor(ColorButtons.init(color: .pink).colorRepresenting)
}
Spacer()
Button(action: {
if cache <= 5{
cache += 1
}
else{
cache = 0
}
if numberCache[cache] == 4{
score += 1
}
else{
score = 0
}
}) {
RoundedRectangle(cornerRadius: 3)
.foregroundColor(ColorButtons.init(color: .orange).colorRepresenting)
}
Spacer()
Button(action: {
if cache <= 5{
cache += 1
}
else{
cache = 0
}
if numberCache[cache] == 5{
score += 1
}
else{
score = 0
}
}) {
RoundedRectangle(cornerRadius: 3)
.foregroundColor(ColorButtons.init(color: .purple).colorRepresenting)
}
Spacer()
}
Spacer()
}
}
}
struct ContentView_Previews: PreviewProvider {
static var previews: some View {
ContentView()
}
}
答案 0 :(得分：0)
我认为您永远都无法达到
else if numberCache.count > 1 && numberCache.count <= 6{...
if numberCache[cache] == 0{之前，在“点击我”按钮中的语句将其追加到numberCache 声明。因此，只有数组0可用。
当您将代码（仅用于测试目的）更改为if numberCache[0] == 0{时，如果您的应用程序崩溃了，您可以进行检查。
尽管如此，您仍可以使用self.didTapstart.toggle()将布尔值从true更改为false，反之亦然，而不是在轻按按钮操作时使用复杂的if语句。
`