小编kal*_*lpa的帖子

我是颤振的新手。我想对齐单选按钮。即，无论文本是什么，单选按钮都应该按列对齐。我正在使用Column小部件，然后Row在其中使用小部件，但得到以下结果。

代码在这里

 Widget build(BuildContext context) {
    return Container(
      child: Column(
        children: [
          Row(
            mainAxisAlignment: MainAxisAlignment.spaceAround,
            children: [
              Row(
                children: [
                  Radio(value: 1, groupValue: 'null', onChanged: (index) {}),
                  Text('Radio button 1')
                ],
              ),
              Row(
                children: [
                  Radio(value: 1, groupValue: 'null', onChanged: (index) {}),
                  Text('Radio 2')
                ],
              ),
              Row(
                children: [
                  Radio(value: 1, groupValue: 'null', onChanged: (index) {}),
                  Text('Test')
                ],
              ),
            ],
          ),
          Row(
            mainAxisAlignment: MainAxisAlignment.spaceAround,
            children: [
              Row(
                children: [
                  Radio(value: 1, groupValue: 'null', onChanged: (index) {}), …

我在 iOS 12.2 模拟器中播放音频时遇到问题，而相同的代码在 iOS 14.3 上运行良好。我已经检查过并在苹果论坛上搜索，发现 iOS 14 也出现了相同类型的问题，但现在已经解决了。

提前致谢。

我的示例代码：

class ViewController: UIViewController {
    
    var audioPlayer:AVPlayer?
    var playerItem:AVPlayerItem?
    
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.
    }
    @IBAction func playMusic() {
        playAudioFromURL()
    }
    
    private func playAudioFromURL() {
           guard let url = URL(string: "https://s3.amazonaws.com/kargopolov/kukushka.mp3") else {
               print("error to get the mp3 file")
               return
           }
           do {
               audioPlayer = try AVPlayer(url: url as URL)
           } catch {
               print("audio file error")
           }
           audioPlayer?.play()
       }
} …