Error by using objects in Subview loaded from XIB with ViewController - ios

Question

I just created a Xib with the Interface for an Audioplayer (Play-Button, Stop-Button, Volume-Slider, Time-Slider). I connected the Files owner to the AudioPlayerViewController and created some Outlets from the Objects and IB Action, by connecting to the ViewController.
Now I'm adding this ViewControllers View as a Subview in an UIScrollview. If I now Use one of these Objects I receive different Errors:
First the Time-Slider. There Exist a IBAction for value Changed:
2013-06-23 14:14:55.448 Bookshelf[17323:907] -[__NSMallocBlock__ CurrentPlayTimeChanged:]: unrecognized selector sent to instance 0x1dd69500
2013-06-23 14:14:55.450 Bookshelf[17323:907] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSMallocBlock__ CurrentPlayTimeChanged:]: unrecognized selector sent to instance 0x1dd69500'
*** First throw call stack:
(0x31e1d2a3 0x39cd897f 0x31e20e07 0x31e1f531 0x31d76f68 0x33d100c5 0x33d10077 0x33d10055 0x33d0f90b 0x33df0d07 0x33d0f507 0x33c2e421 0x31df26cd 0x31df09c1 0x31df0d17 0x31d63ebd 0x31d63d49 0x3592f2eb 0x33c79301 0x680dd 0x3a10fb20)
libc++abi.dylib: terminate called throwing an exception
Second The Buttons:
2013-06-23 14:16:36.842 Bookshelf[17339:907] -[__NSArrayM AudioStopped:]: unrecognized selector sent to instance 0x1fdb1480
2013-06-23 14:16:36.844 Bookshelf[17339:907] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSArrayM AudioStopped:]: unrecognized selector sent to instance 0x1fdb1480'
*** First throw call stack:
(0x31e1d2a3 0x39cd897f 0x31e20e07 0x31e1f531 0x31d76f68 0x33d100c5 0x33d1014d 0x33d100c5 0x33d10077 0x33d10055 0x33d0f90b 0x33d0fe01 0x33c385f1 0x33c25801 0x33c2511b 0x359305a3 0x359301d3 0x31df2173 0x31df2117 0x31df0f99 0x31d63ebd 0x31d63d49 0x3592f2eb 0x33c79301 0xa0dd 0x3a10fb20)
libc++abi.dylib: terminate called throwing an exception
Third The Volume Slider:
The ViewController .h :
#import <UIKit/UIKit.h>
#interface AudioPlayerViewController : UIViewController {
NSURL * fileURL;
}
#property (weak, nonatomic) IBOutlet UISlider *volumeSlider;
#property (weak, nonatomic) IBOutlet UIBarButtonItem *AudioStopButton;
#property (weak, nonatomic) IBOutlet UIBarButtonItem *AudioPlay_PauseButton;
#property (weak, nonatomic) IBOutlet UIBarButtonItem *AudioTimeLabel;
#property (weak, nonatomic) IBOutlet UISlider *TimeLineSlider;
#property (nonatomic, strong) NSURL * fileURL;
- (IBAction)volumeChanged:(id)sender;
- (IBAction)AudioStopped:(id)sender;
- (IBAction)AudioPlayPaused:(id)sender;
- (IBAction)TimeLabelPressed:(id)sender;
- (IBAction)CurrentPlayTimeChanged:(id)sender;
#end
The ViewController .m :
#import "AudioPlayerViewController.h"
#interface AudioPlayerViewController ()
#end
#implementation AudioPlayerViewController
#synthesize volumeSlider, AudioPlay_PauseButton, TimeLineSlider, AudioTimeLabel, AudioStopButton;
#synthesize fileURL;
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (IBAction)volumeChanged:(id)sender {
NSLog(#"NEW VOL");
}
- (IBAction)AudioStopped:(id)sender {
NSLog(#"STOP");
}
- (IBAction)AudioPlayPaused:(id)sender {
NSLog(#"PLAY");
}
- (IBAction)TimeLabelPressed:(id)sender {
NSLog(#"TIMELABEL");
}
- (IBAction)CurrentPlayTimeChanged:(id)sender {
NSLog(#"NEW TIME POS");
}
#end
The .m method where the Subview is added:
- (void) addAudio_index:(int)index {
AudioPlayerViewController *audiov = [[AudioPlayerViewController alloc] init];
CGRect frame_s = [[[ScrollView subviews] objectAtIndex:[[ScrollView subviews] count]-1] frame];
CGRect frame = audiov.view.frame;
frame.origin.y = frame_s.size.height+frame_s.origin.y;
frame.origin.x = 0;
//[audiov.view setFrame:frame];
UIView *n =[[UIView alloc]initWithFrame:frame];
[ScrollView addSubview:n];
[n addSubview:audiov.view];
[audiov.view setHidden:FALSE];
}
The Player XIB:
I thought some hours about but I got no idea about any solution, so maybe you can help me...

Answer 1

Your code is retaining the AudioPlayerViewControllers view (and therefore all of the subviews) but it isn't retaining the audiov instance. So, when any of the views fire their actions they are calling an instance that has been deallocated.
To resolve, create a property and store the audiov (so that it is retained).