iOS：我的聲音文件無法在PickerViewController中播放

Question

我有一個使用pickerView控制器的多聲音應用程序的音樂播放器，但是當我嘗試構建應用程序時，聲音不出來。任何人都可以幫我解決我的代碼問題？這是我的故障排除代碼。

.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 

嘗試設置pickerview.delegate =自我;

將自動調用，一旦你設置它的代表pickerview你不需要> playSelected音樂按鈕明確我希望。