启动AVAudioPlayer时的EXC_BAD_ACCESS

Question

当我在一个自定义NSObject中创建我的AVAudioPlyer时，我得到了一个EXC_BAD_ACCESS，我将其用作应用程序中的共享实例。不过，我似乎无法孤立问题出在哪里。它说player = [[AVAudioPlayer alloc] initWithContentsOfURL:[item valueForProperty:MPMediaItemPropertyAssetURL] error:&error];有问题，但当我NSLog它时，播放器显示不为空，而且我检查了url，它返回ipod-library://item/item.mp3?id=2689306087076130700，所以它也不为空。注意：我确实在这个网站上看过类似的问题，但仍然找不到问题。我也试过[[AVAudioSession sharedInstance] setActive:YES error:&activationError];

我的NSObject:Player.h

#import <Foundation/Foundation.h>
#import <AVFoundation/AVFoundation.h>
#import <MediaPlayer/MediaPlayer.h>
@interface Player : NSObject <AVAudioPlayerDelegate>{
    NSTimer *timer;
}
@property NSMutableArray *queue;
@property NSMutableArray *upNext;
@property AVAudioPlayer *player;
@property NSTimer *timer;
-(void)setCurrentPlaying:(MPMediaItem *)item;
-(void)addUpNext:(MPMediaItem *)item;
-(void)play;
-(void)pause;
-(void)setup;
+ (id)sharedInstance;
@end

Player.m

#import "Player.h"
@implementation Player
@synthesize timer, player, queue;
+ (id)sharedInstance{
    static Player *sharedInstance;
    @synchronized(self) {
        if (!sharedInstance){
            sharedInstance = [[Player alloc] init];
            [sharedInstance setup];
        }
        return sharedInstance;
    }
}
-(void)setCurrentPlaying:(MPMediaItem *)item{
    NSError *error = nil;
    NSLog(@"%@l: %@", player, [item valueForProperty:MPMediaItemPropertyAssetURL]);
    player = [[AVAudioPlayer alloc] initWithContentsOfURL:[item valueForProperty:MPMediaItemPropertyAssetURL] error:&error];
    NSLog(@"%@", error.localizedDescription);
    [player prepareToPlay];
    [player play];
}
-(void)setup{
    NSError *activationError = nil;
    [[AVAudioSession sharedInstance] setActive:YES error:&activationError];
    self.player = [[AVAudioPlayer alloc] init];
    self.timer = [NSTimer scheduledTimerWithTimeInterval:2.0
                                     target:self
                                   selector:@selector(check)
                                   userInfo:nil
                                    repeats:NO];
}

在我看来，我打电话给：

[[Player sharedInstance] setCurrentPlaying:song];

Answer 1

您正在尝试访问iPod库吗？

我认为不可能将AVAudioPlayer与iPod库一起使用，除非你找到了将歌曲复制到应用程序目录的方法。

看看这里或这里

请改用AVPlayer。。。