我正在制作一个词汇应用程序。用户将被要求选择一个日期,并且在点击其中一个日期后,prepareForSegue()将一个包含大约30个词汇的数组传递给ViewController。然后这个viewController开始显示一个词汇标签,一秒后,它显示一个图像,再过一秒后,它将显示词汇的含义。
这是我的代码。
class ViewController: UIViewController {
@IBOutlet weak var vocabImage: UIImageView!
@IBOutlet weak var meaningLabel: UILabel!
@IBOutlet weak var vocabLabel: UILabel!
var vocabData = [String]()
var meaningData = [String]()
var vocabNumber : Int = 0
var sceneNumber : Int = 0
var speed : Double = 0.01
var commentSwitch = false
var audioPlayer = AVAudioPlayer()
override func viewDidLoad() {
super.viewDidLoad()
controlTower()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func controlTower() {
switch sceneNumber {
case 0:
if vocabNumber == 0 && commentSwitch == false{
let myAlert = UIAlertController(title: "Lets start to memorize it,머리 속에 단어를 입력하는 단계", message: "뜻을 예측해 보자구요", preferredStyle: UIAlertControllerStyle.Alert)
let myAlertAction = UIAlertAction(title: "Start", style: UIAlertActionStyle.Default, handler: { Void in
self.commentSwitch = true
self.controlTower()
})
myAlert.addAction(myAlertAction)
presentViewController(myAlert, animated: true, completion:nil)
}else{
displayVocab()
NSTimer.scheduledTimerWithTimeInterval(speed, target: self, selector: #selector(ViewController.controlTower), userInfo: nil, repeats: false)
print("\(vocabNumber) - 0")
sceneNumber = 1
}
case 1:
displayImage()
NSTimer.scheduledTimerWithTimeInterval(speed, target: self, selector: #selector(ViewController.controlTower), userInfo: nil, repeats: false)
print("\(vocabNumber) - 1")
sceneNumber = 2
case 2:
displayMeaning()
NSTimer.scheduledTimerWithTimeInterval(speed, target: self, selector: #selector(ViewController.controlTower), userInfo: nil, repeats: false)
print("\(vocabNumber) - 2")
sceneNumber = 3
case 3:
if (vocabNumber == vocabData.count ){
deleteAll()
sceneNumber = 0
vocabNumber = 0
print("I can't get in here")
}else {
deleteAll()
sceneNumber = 0
NSTimer.scheduledTimerWithTimeInterval(speed, target: self, selector: #selector(ViewController.controlTower), userInfo: nil, repeats: false)
print("\(vocabNumber) - 3")
controlTower()
vocabNumber++
}
default: break
}
}
func displayVocab() {
//sound
read()
vocabLabel.text = vocabData[vocabNumber]
func displayImage() {
vocabImage.image = UIImage(named: vocabData[vocabNumber])
func displayMeaning(){
meaningLabel.text = meaningData[vocabNumber]
}
}
所以每次在diplay之前,它都会访问controlTower,继续显示数据,直到达到条件(vocabNumber == vocabData.count)&& (scenenumber == 3)。
这是我的问题。当vocabNumber变为31(总data.count = 31)时,它将获得
致命错误:索引超出范围
在 func displayVocab(){
vocabLabel.text = vocabData[vocabNumber]
}
这里(我认为是vocabNumber)
我无法弄清楚它为什么不起作用。
即使我把
if (vocabNumber <= vocabData.count){
在函数中,这仍然无法得到案例3(如果条件)
让我知道此错误的哪部分代码是错误的。
谢谢。