Question

我有一个使用pickerView控制器的多个声音应用程序的音乐播放器但是当我尝试构建应用程序时，声音没有出来。任何人都可以帮我解决我的代码问题？这是我的故障排除代码。

.H文件

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


@interface ViewController : 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:@"music1",@"music2",@"music3",@"music4",@"music5",
                        @"music6",nil];
        }

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



        if ([[musicList objectAtIndex:row] isEqual:@"music1"])
        {


            NSURL *path = [[NSBundle mainBundle] URLForResource:@"music1" withExtension:@"mp3"];
            AVAudioPlayer *theAudio = [[AVAudioPlayer alloc] initWithContentsOfURL:path error:NULL];


            theAudio.delegate = self;
            [theAudio play];

            NSString *resultString = [[NSString alloc] initWithFormat:
                                      @"music1",
                                      [musicList objectAtIndex:row]];
            musicTitle.text = resultString;


        }

-(IBAction)playSelectedMusic:(id)sender{

    how do i call the didSelectRow & put it here ?

}

Answer 1

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

尝试设置pickerview.delegate = self;
一旦你为pickerview设置了委托，
就会被自动调用你不需要明确地使用＆gt; playSelected音乐按钮。

iOS：我的声音文件无法在PickerViewController中播放

1 个答案: