iPhone My program crashes after it play a mp4 file using the - iphone

Question

I am making a program that loads videos from a server and then saves them locally. The programmed worked fine when i was doing it synchronizely. When I changed it to do it asynchronously , it would crash when the person return to the pre screen and try to press any of the buttons with a sig bad memory error.
What happens is the vedio loads and plays ok. When they click the done button the methed
- (void) moviePlayBackDidFinish:(NSNotification*)notification;{
[ mp stop];
// [ mp release];
[self dismissModalViewControllerAnimated: true];
}
exicutes and it goes to the pre screen. Now on the pre screen, if they click on any button, i get a
I did the following
1. the file is big so I chnage my
[[NSMutableData alloc] initWithLebngth:0]; to [[NSMutableData alloc] initWithCapacity:200000];, did not work.
- (void)viewDidLoad {
[super viewDidLoad];
// construct the url
NSString *mServerName=[ [ NSString alloc] initWithString:#"http://www.besttechsolutions.biz/projects/golfflix/" ];
NSString *mFullName=[ mServerName stringByAppendingString: mVedioName ];
NSURL *movieUrl=[[NSURL alloc] initWithString:mFullName];
// start the transmision
NSURLRequest *theRequest = [NSURLRequest requestWithURL:movieUrl cachePolicy:NSURLRequestReloadIgnoringLocalCacheData timeoutInterval:60];
receivedData = [[NSMutableData alloc] initWithCapacity:100000000];
connection = [[NSURLConnection alloc] initWithRequest:theRequest delegate:self startImmediately:YES];
[movieUrl release];
[mServerName release];
}
///////////////////////////////////////////////////////////////////////////////////////////////
// background loading
- (void) connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {
[UIApplication sharedApplication].networkActivityIndicatorVisible = YES;
[receivedData setLength:0];
}
- (void) connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
[receivedData appendData:data];
}
- (void) connection:(NSURLConnection *)connection didFailWithError:(NSError *)error {
[UIApplication sharedApplication].networkActivityIndicatorVisible = NO;
[connection release];
}
- (NSCachedURLResponse *) connection:(NSURLConnection *)connection willCacheResponse:(NSCachedURLResponse *)cachedResponse {
return nil;
}
- (void) connectionDidFinishLoading:(NSURLConnection *)connection {
[UIApplication sharedApplication].networkActivityIndicatorVisible = NO;
[connection release];
/////////////////////////////////////////////////////////////////////////////////
// Save vedio
NSFileManager *mFile= [NSFileManager defaultManager];
NSString *filename=[ NSHomeDirectory() stringByAppendingPathComponent:mVedioName];
[mFile createFileAtPath:filename contents: receivedData attributes:nil];
[ receivedData release ];
// play it
NSURL *fileUrl=[ NSURL fileURLWithPath:filename];
if (mp==nil)
{
mp=[[MPMoviePlayerController alloc] initWithContentURL: fileUrl];
[mp.view setFrame: self.view.bounds];
[self.view addSubview: mp.view];
// Set movie player layout
[mp setControlStyle:MPMovieControlStyleFullscreen];
[mp setFullscreen:YES];
// May help to reduce latency
[mp prepareToPlay];
[mp play];
}
else {
[mp stop];
mp.contentURL=fileUrl;
[mp play];
}
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(moviePlayBackDidFinish:)
name:MPMoviePlayerPlaybackDidFinishNotification
object:nil];
// movie reced save to file
}
- (void) moviePlayBackDidFinish:(NSNotification*)notification;{
[ mp stop];
// [ mp release];
[self dismissModalViewControllerAnimated: true];
}
- (void)didReceiveMemoryWarning {
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
// Release any cached data, images, etc. that aren't in use.
}
- (void)viewDidUnload {
[super viewDidUnload];
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}
any thoughts on this would be GREAT, ben stuck for days!!!!
Ted

Answer 1

If you are coming back to the pre screen then try to shift your code to
-(void)viewWillAppear:(BOOl)animated
{
//code
}
because the function viewDidLoad will be called only one time when the view is loaded.
but the function viewWillAppear will be called whenever that view will appear.