iOS：当用户选择新的选择器时，如何自动停止 PickerViewController 上的声音文件？

Question

我有一台具有多种声音的音乐播放器。我的问题是，当我在选择器视图中选择一个对象时，它会自动播放，但是当我选择一个新对象时，旧的声音不会停止。声音将与新声音重叠。我如何自动停止它？这是我的故障排除代码：

H 文件：

#import <UIKit/UIKit.h>
#import <AVFoundation/AVAudioPlayer.h>

@interface musixGreetingViewController : UIViewController <UIPickerViewDelegate, UIPickerViewDataSource, AVAudioPlayerDelegate>{

    UIPickerView       *picker;
    UILabel            *musicTitle;
    NSMutableArray     *musicList;
    AVAudioPlayer      *audioPlayer;


}


@property (nonatomic, retain) IBOutlet UIPickerView *picker;
@property (nonatomic, retain) IBOutlet UILabel *musicTitle;
@property (nonatomic, retain) NSMutableArray *musicList;

-(IBAction)playSelectedMusic:(id)sender;


@end

M 文件：

    - (void)viewDidLoad
    {
        [super viewDidLoad];
         musicList = [[NSMutableArray alloc] initWithObjects:@"m1",@"m2",@"m3",@"m6",@"m4", @"m5",nil];
    }

-(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component


{

    //[self playSelectedMusic:self];

    if ([[musicList objectAtIndex:row] isEqual:@"m1"])
    {

        NSString *path = [[NSBundle mainBundle] pathForResource:@"m1" ofType:@"mp3"];
        AVAudioPlayer* theAudio=[[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL];

        pickerView.delegate = self;
        [theAudio play];

        NSString *resultString = [[NSString alloc] initWithFormat:
                                  @"m1",
                                  [musicList objectAtIndex:row]];
        musicTitle.text = resultString;


    }


    if ([[musicList objectAtIndex:row] isEqual:@"m2"])
    {

        NSString *path = [[NSBundle mainBundle] pathForResource:@"m2" ofType:@"mp3"];
        AVAudioPlayer* theAudio=[[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL];

        pickerView.delegate = self;
        [theAudio play];



        NSString *resultString = [[NSString alloc] initWithFormat:
                                  @"m2",
                                  [musicList objectAtIndex:row]];
        musicTitle.text = resultString;


    }

-(IBAction)playSelectedMusic:(id)sender{

I want the music play here, how to do so without autoplay the music in the picker view?

}

Answer 1

这会将播放器重置为开头：

[theAudio setCurrentTime:0.0];