play audio with button from NSString

[gbenna]

I have an app which has a tableview. when certain cells are selected a new view controller with a xib is loaded. The xib has a UIButton which when selected plays an audio file. The audio file played depends on which cell is selected and is designated in a plist associated with the tableview. I have created an NSString properties for the audio file and I have "didSelectRowAtIndexPath" assigning these properties. Then in the view controller I have tried to set up the audio in the ViewDidLoad but for some reason it is not working. Can someone help me out?

here is some of my code

this is in my table view.

- (void)tableViewUITableView *)tableView didSelectRowAtIndexPathNSIndexPath *)indexPath {

const NSDictionary *const row = [self rowForIndexPath:indexPath];

NSString *wantedClassName = [row objectForKey:@"controller"];
UIViewController *const vc = [[NSClassFromString (wantedClassName) alloc] init];
NSLog(@"controller is -%@-", wantedClassName);

if ([vc isKindOfClass:[Location_One class]])
{
Location_One* loVC = (Location_One*)vc;
loVC.myAudio = [row objectForKey:@"audio"];
}


Viewcontroller .h file

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


@interface Location_One : UIViewController <AVAudioPlayerDelegate> {
AVAudioPlayer *theAudio;
NSString *myAudio;
}

@property (nonatomic, retain) NSString *myAudio;
@property (nonatomic, retain) AVAudioPlayer *theAudio;
-(IBAction)pushButton;
-(IBAction)play;
-(IBAction)stop;
-(IBAction)pause;
@end

viewcontroller .m file

@synthesize myAudio;
@synthesize theAudio;

-(IBAction)pushButton {
}
-(IBAction)play {
[theAudio play];
}
-(IBAction)stop {
[theAudio stop];
}
-(IBAction)pause {
[theAudio pause];
}


- (void)viewDidLoad {
[super viewDidLoad];

NSString *audioFilePath = [[NSBundle mainBundle] pathForResource:self.myAudio ofType:@"mp3"];
if (theAudio) [theAudio release];
theAudio = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL URLWithString:audioFilePath] error:nil];
theAudio.delegate =self;
[theAudio play];
}

I have assigned the button in IB.

[DigitalDownbeat]

You have to convert the string to an NSURL: Like this:

NSString *audioFilePath = [[NSBundle mainBundle] pathForResource:self.myAudio ofType:@"mp3"];
if (theAudio) [theAudio release];

//checking to see if file exists.. good idea otherwise app can crash
if([[NSFileManager defaultManager] fileExistsAtPath:audioFilePath]){
NSURL *audioFile=[NSURL fileURLWithPath:audioFilePath];
theAudio = [[AVAudioPlayer alloc] initWithContentsOfURL:audioFile error:nil];
theAudio.delegate =self;
[theAudio play];
}


That should make it work out for you.

[gbenna]

Thanks this helped a lot the only thing I changed was to change the @"mp3" to ofType:nil]; since it was already declared in the plist. Thanks again for your reply and help.