Objective-C NSURL URLWithString appears to fail when using variable

Question

So this is my first posting on StackOverflow, so excuse me if my request is not well formed.

I am attempting to load a variable with type NSString into an NSURL with the following line:

audioPlayer = [[AudioPlayer alloc] initPlayerWithURL:[NSURL URLWithString:aArchiveItem.streamURL] delegate:self];

And in AudioPlayer implementation I am using:

-(id)initPlayerWithURL:(NSURL *)url delegate:(id<AudioPlayerDelegate>) aDelegate {
    self = [super init];

    delegate = aDelegate;

    queue = [[AudioQueue alloc] initQueueWithDelegate:self];

    fileStream = [[AudioFileStream alloc] initFileStreamWithDelegate:self];
    [fileStream open];

    request = [[AudioRequest alloc] initRequestWithURL:url delegate:self];

    return self;
}

When I hardcode a URL string(e.g. URLWithString:@"http://www.example.com") the call to the audioPlayer work flawlessly, but when attempting to populate it with the value of aArchiveItem.streamURL it fails...

What am I doing wrong here?

Answer 1

probably your url has white spaces try to do the following before the using the url:

aArchiveItem.streamURL=[aArchiveItem.streamURL stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];

Answer 2

Use the debugger. Break on the first line you listed and evaluate what "aArchiveItem.streamURL" actually is at the time. Is it actually a well-formed URL string?

Also, "it fails" is not enough information. In what way, exactly? I'm guessing the URL you're trying to create with aArchiveItem.streamURL is nil (because the string is not valid) and things expecting a URL are griping, but that's only a guess.