Question

也许在升级到Xcode 10.1之后，当我的AVAudioplayer应该播放MP3时，我的应用在启动时崩溃。我看不到如何调试它。

我已经尝试了各种方法来理解该问题，包括在初始化时显示潜在的错误。

//AppDelegate.h
#import <UIKit/UIKit.h>
#import <AVFoundation/AVFoundation.h>
#include <AudioToolbox/AudioToolbox.h>

@interface AppDelegate : UIResponder <UIApplicationDelegate> {
    AVAudioPlayer *myAudioPlayer; }

@property (strong, nonatomic) UIWindow *window; @property (nonatomic, retain) AVAudioPlayer *myAudioPlayer; @property (assign,nonatomic) NSUInteger bSound; @property (assign,nonatomic) double  fVolume;


@end

//AppDelegate.m
#import "AppDelegate.h"

#import <AVFoundation/AVFoundation.h>
#include <AudioToolbox/AudioToolbox.h>

@implementation AppDelegate

@synthesize myAudioPlayer;


- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    NSString *soundFilePath = [[NSBundle mainBundle] pathForResource:@"theBoxCatGames-09eCommerce" ofType: @"mp3"];
    NSURL *fileURL = [[NSURL alloc] initFileURLWithPath:soundFilePath ];


    AVAudioSession* audioSession = [AVAudioSession sharedInstance];
    [audioSession setActive:YES error:nil];//checked, there is no error

    myAudioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:fileURL error:nil]; //checked, there is no error

       [myAudioPlayer play];    //<--------raised exception 
       return YES; 
}

我得到一个libc ++ abi.dylib`__cxa_throw：_Unwind_RaiseException

<AVAudioPlayer: 0x60000365f220>
  <AudioPlayerImpl: 0x600001255080>
  self->myAudioPlayer->_impl->_delegate:
 <nil>
 self->myAudioPlayer->_impl->_audioSession:
<AVAudioSession: 0x600003450a00>

我不确定在异常使程序停止时应在对象浏览器中找到哪些值。

（我还显示了其他值，例如设备）

self->myAudioPlayer->_currentDevice: <nil>

如何调试AVAudioPlayer崩溃

0 个答案: