ios - 线程 1:EXC_BAD_ACCESS(代码=1,地址=0x48)
问题描述
我在 XCODE 上使用 swift。我遇到了这个问题,如果我想点击我的按钮来播放我的声音。它会崩溃。我有视图控制器。第一个视图控制器连接到一个情节提要。那个故事板有一个按钮播放声音。当我运行它时,声音会播放。当它去第二个故事板播放声音时它崩溃了
[2张图片是我用来播放音频的代码。我在第一个视图控制器上粘贴了相同的代码。] 这是第二个视图控制器上的内容。当我按下第二个故事板上的按钮时,我得到 Thread 1: EXC_BAD_ACCESS (code=1, address=0x48) 但在我按下的第一个按钮上没有出现此错误。
当我运行模拟器并进入第二个视图控制器时会发生这种情况
class Level1ViewController: UIViewController, AVAudioPlayerDelegate {
var player: AVAudioPlayer = AVAudioPlayer()
var correctPlayer: AVAudioPlayer = AVAudioPlayer()
var wrongPlayer: AVAudioPlayer = AVAudioPlayer()
@IBAction func correctAnswer(_ sender: Any) {
correctPlayer.play()
}
@IBAction func playOne(_ sender: Any) {
player.play()
}
@IBOutlet weak var option2: UIButton! // wrong answer
@IBAction func wrongAnswer1LV(_ sender: Any) {
}
@IBOutlet weak var option1: UIButton!
override func viewDidLoad() {
super.viewDidLoad()
//View Controller 1 - Working
do {
let audioPlayer = Bundle.main.path (forResource: "bark", ofType: "wav")
try player = AVAudioPlayer(contentsOf: NSURL(fileURLWithPath: audioPlayer!)as URL)
}
catch {
//ERROR!
}
do {
let audioPlayer2 = Bundle.main.path (forResource: "Ding-Sound-Effect_qZC5gtOw3DU", ofType: "mp3")
try correctPlayer = AVAudioPlayer(contentsOf: NSURL(fileURLWithPath: audioPlayer2!)as URL)
}
catch {
//ERROR!
}
视图控制器 2 - 不工作(给出错误)
class Level2LevelViewController: UIViewController, AVAudioPlayerDelegate {
var player: AVAudioPlayer = AVAudioPlayer()
var correctPlayer: AVAudioPlayer = AVAudioPlayer()
var wrongPlayer: AVAudioPlayer = AVAudioPlayer()
@IBAction func levelTwoPLay(_ sender: Any) {
correctPlayer.play() **** THREAD 1: EXC_BAD_ACESS****
}
override func viewDidLoad() {
super.viewDidLoad()
do {
let audioPlayerII = Bundle.main.path (forResource: "Door Open and Close Slam Sound Effects", ofType:"mp3")
try player = AVAudioPlayer(contentsOf: NSURL(fileURLWithPath: audioPlayerII!)as URL)
}
catch {
//ERROR!!
}
leveltwoOp1.backgroundColor = UIColor.black
leveltwoOp2.backgroundColor = UIColor.black
leveltwoOpTh.backgroundColor = UIColor.black
leveltwoOp4.backgroundColor = UIColor.black
解决方案
您正在correctPlayer
View Controller 1 中创建一个对象,并使用以下命令对其进行初始化:
try correctPlayer = AVAudioPlayer(contentsOf: NSURL(fileURLWithPath: audioPlayer2!)as URL)
没关系....但是在 View Controller 2 中,您有:
var correctPlayer: AVAudioPlayer = AVAudioPlayer()
它创建了一个仅在 View Controller 2 范围内的新实例correctPlayer
,然后您调用:
correctPlayer.play()
没有初始化它。
在 View Controller 2 中,您需要再次调用:
do {
let audioPlayer2 = Bundle.main.path (forResource: "Ding-Sound-Effect_qZC5gtOw3DU", ofType: "mp3")
try correctPlayer = AVAudioPlayer(contentsOf: NSURL(fileURLWithPath: audioPlayer2!)as URL)
}
catch {
//ERROR!
}
之后您应该能够播放该声音。