我遇到两个问题，第一个问题是每次Timer调用此函数时，我都会收到上述错误信息（包括漂亮的崩溃）：
func updateTime() {
let currentTime = Int(player.currentTime)
let minutes = currentTime/60
let seconds = currentTime - minutes * 60
if seconds < 10 {
tempo.text = String(minutes) + ":0" + String(seconds)
} else {
tempo.text = String(minutes) + ":" + String(seconds)
}
durationSliderOutlet.value = Float(player.currentTime)
if currentTime == Int(player.duration - 1) {
playpauseOutlet.setTitle("Play", for: .normal)
isPlaying = false
}
print("currentTime: \(currentTime)")
print(Int(player.duration))
print("minutes: \(minutes)")
print("seconds: \(seconds)")
print(isPlaying)
}
我只是想在标签中显示音频文件的当前时间，如果我注释掉这段代码
if seconds < 10 {
tempo.text = String(minutes) + ":0" + String(seconds)
} else {
tempo.text = String(minutes) + ":" + String(seconds)
}
......一切正常！
当我按下按钮时，第二个引发相同的崩溃和错误......
@IBAction func playpauseButton(_ sender: UIButton) {
if isPlaying == false {
playpauseOutlet.setImage(#imageLiteral(resourceName: "pause.png"), for: .normal)
player.play()
isPlaying = true
} else {
playpauseOutlet.setImage(#imageLiteral(resourceName: "play.png"), for: .normal)
player.pause()
isPlaying = false
}
}
注意：(#imageLiteral(resourceName: "play.png")显示为一个小的白色矩形。如果我尝试类似playpauseOutlet.setImage(UIImage(named: "play.png"), for: .normal)的内容，它也会崩溃。
我假装使用此代码的方法是根据isPlaying状态将按钮的“播放”图像更改为“暂停”图像，反之亦然。提前谢谢！