Play audio from Parse via UIButton - ios

Question

I've been working on an app that allows audio to be played from Parse (like a social network), but am having trouble getting the code to not have errors.
My .h file
#import <UIKit/UIKit.h>
#interface TalklineViewController : UIViewController
#property (nonatomic, strong) IBOutlet UIScrollView *wallScroll;
#end
My .m file
#interface TalklineViewController ()
#property (nonatomic, retain) NSArray *wallAudioArray;
#end
#implementation TalklineViewController
#synthesize wallAudioArray = _wallAudioArray;
#synthesize wallScroll = _wallScroll;
- (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.
}
-(void)getWallAudio
{
//Prepare the query to get all the images in descending order
//1
PFQuery *query = [PFQuery queryWithClassName:#"AudioObject"];
//2
[query orderByDescending:#"createdAt"];
[query findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
//3
if (!error) {
//Everything was correct, put the new objects and load the wall
self.wallAudioArray = nil;
self.wallAudioArray = [[NSArray alloc] initWithArray:objects];
[self loadWallViews];
} else {
//4
NSString *errorString = [[error userInfo] objectForKey:#"error"];
UIAlertView *errorAlertView = [[UIAlertView alloc] initWithTitle:#"Error" message:errorString delegate:nil cancelButtonTitle:#"Ok" otherButtonTitles:nil, nil];
[errorAlertView show];
}
}];
}
-(void)loadWallViews
{
//Clean the scroll view
for (id viewToRemove in [self.wallScroll subviews]){
if ([viewToRemove isMemberOfClass:[UIView class]])
[viewToRemove removeFromSuperview];
}
//For every wall element, put a view in the scroll
int originY = 10;
for (PFObject *audioObject in self.wallAudioArray){
//1
//Build the view with the image and the comments
UIView *wallAudioView = [[UIView alloc] initWithFrame:CGRectMake(10, originY, self.view.frame.size.width - 20 , 300)];
//2
//Add the image
PFFile *audio = (PFFile *)[audioObject objectForKey:#"audio"];
UIButton *userAudio = [[UIButton alloc][[UIButton buttonWithType:UIButtonTypeSystem audioWithData:audio.getData]];
userAudio.frame = CGRectMake(0, 0, wallAudioView.frame.size.width, 200);
[wallAudioView addSubview:userAudio];
//3
//Add the info label (User and creation date)
NSDate *creationDate = audioObject.createdAt;
NSDateFormatter *df = [[NSDateFormatter alloc] init];
[df setDateFormat:#"HH:mm dd/MM yyyy"];
//4
UILabel *infoLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, 210, wallAudioView.frame.size.width,15)];
infoLabel.text = [NSString stringWithFormat:#"Uploaded by: %#, %#", [audioObject objectForKey:#"user"], [df stringFromDate:creationDate]];
infoLabel.font = [UIFont fontWithName:#"Arial-ItalicMT" size:9];
infoLabel.textColor = [UIColor whiteColor];
infoLabel.backgroundColor = [UIColor clearColor];
[wallAudioView addSubview:infoLabel];
//5
//Add the comment
UILabel *commentLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, 240, wallAudioView.frame.size.width, 15)];
commentLabel.text = [audioObject objectForKey:#"comment"];
commentLabel.font = [UIFont fontWithName:#"ArialMT" size:13];
commentLabel.textColor = [UIColor whiteColor];
commentLabel.backgroundColor = [UIColor clearColor];
[wallAudioView addSubview:commentLabel];
//6
[self.wallScroll addSubview:wallAudioView];
originY = originY + wallAudioView.frame.size.width + 20;
}
//7
//Set the bounds of the scroll
self.wallScroll.contentSize = CGSizeMake(self.wallScroll.frame.size.width, originY);
}
/*
#pragma mark - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
// Get the new view controller using [segue destinationViewController].
// Pass the selected object to the new view controller.
}
*/
#end
The problem line is:
UIButton *userAudio = [[UIButton alloc][[UIButton buttonWithType:UIButtonTypeSystem audioWithData:audio.getData]];
Any help is greatly appreciated!

Answer 1

UIButton doesn't have an audioWithData method, so that's the biggest issue here; instead, add a target to the button to play the audio with a seperate method:
UIButton *userAudio = [UIButton buttonWithType:UIButtonTypeSystem];
[userAudio setFrame:CGRectMake(20, 20, 100, 44)];
[userAudio setTitle:#"Play Audio!" forState:UIControlStateNormal];
[userAudio addTarget:self action:#selector(playAudio) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:userAudio];
- (void)playAudio
{
// Your audio data and playing code here
// audio.getData
}