CODEWITHSUNDEEP
iphoneiosobjective-cavplayer
stackOverFlew
stackOverFlew

Reputation: 1499

iOS background audio linker error

error;

undefined symbols for architecture i386:
    "_AudioSessionSetProperty", referenced from:
    -[AppDelegate applicationDidFinishLaunching:] in AppDelegate.o
    ld: symbol(s) not found for architecture i386
        clang: error: linker command failed with exit code 1 (use -v to see invocation)

code i am using:

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

    // Override point for customization after application launch.

    // Set AudioSession
    NSError *sessionError = nil;
    [[AVAudioSession sharedInstance] setDelegate:self];
    [[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayAndRecord error:&sessionError];

    /* Pick any one of them */
    // 1. Overriding the output audio route
    //UInt32 audioRouteOverride = kAudioSessionOverrideAudioRoute_Speaker;
    //AudioSessionSetProperty(kAudioSessionProperty_OverrideAudioRoute, sizeof(audioRouteOverride), &audioRouteOverride);

    // 2. Changing the default output audio route
    UInt32 doChangeDefaultRoute = 1;
    AudioSessionSetProperty(kAudioSessionProperty_OverrideCategoryDefaultToSpeaker, sizeof(doChangeDefaultRoute), &doChangeDefaultRoute);

    [self.window addSubview:rootController.view];
    [self.window makeKeyAndVisible];

    return YES;
}

(from https://devforums.apple.com/thread/90684?start=0&tstart=0 and this app was developed and works fine under ios 5.0, but crashes under ios 4.3 and How do I get my AVPlayer to play while app is in background?)

finally my plist:

enter image description here what is the issue? in my header of appdelegate: 

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

@interface AppDelegate : UIResponder <UIApplicationDelegate, AVAudioPlayerDelegate> {

}

seems that everything is imported. What am I doing incorrectly?

Upvotes: 1

Views: 1305

Answers (1)

stackOverFlew
stackOverFlew

Reputation: 1499

This is how I got it to play audio in the background:

// Allow to play in background
[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayback error:nil];
[[AVAudioSession sharedInstance] setActive:YES error:nil];

also this fixed the above bug:

Add the AudioToolbox and AVFoundation frameworks to your project by Right-Cliking on Frameworks -> Add -> Existing Frameworks

Upvotes: 2

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