I am use below address to download a mp3 file. I have a uitoolbarbutton and when this button tapped I call downloadandCreatePath and then it make a view that contains my`downloadProgressV' and a UIButton for cancelling the download.
I click download the view appears and download. Download done successfully and also if I cancel, it works fine too.
The problem is that if I do it for second time and then third time. The app crashes on the third time with EXC_BAD_ACCESS message on my appdelegate.
NSURLResponse *urlResponse;
NSMutableData *downloadedMutableData;
NSURLConnection *connectionManager;
- (NSString *) downloadandCreatePath: (int) doaId
{
@try {
self.downloadProgressV.progress=0.0;
self.downloadView.hidden=NO;
NSString *stringURL = @"http://www.ergmusic.com/mp3-samples/488000/488799.mp3";
NSURLRequest *urlRequest = [NSURLRequest requestWithURL:[NSURL URLWithString:stringURL]
cachePolicy:NSURLRequestReloadIgnoringLocalCacheData
timeoutInterval:60.0];
connectionManager = [[NSURLConnection alloc] initWithRequest:urlRequest delegate:self];
if (!connectionManager) {
// Release the receivedData object.
downloadedMutableData = nil;
// Inform the user that the connection failed.
}
}
@catch (NSException *exception) {
NSLog(@"buuuuuuug");
return @"";
}
}
-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
[downloadedMutableData setLength:0];
urlResponse = response;
}
-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
[downloadedMutableData appendData:data];
self.downloadProgressV.progress = ((100.0/urlResponse.expectedContentLength)*downloadedMutableData.length)/100;
}
- (void)connection:(NSURLConnection *)connection
didFailWithError:(NSError *)error
{
connectionManager = nil;
downloadedMutableData = nil;
}
-(void)connectionDidFinishLoading:(NSURLConnection *)connection {
self.downloadProgressV.progress=0.0;
self.downloadView.hidden = YES;
connectionManager = nil;
downloadedMutableData = nil;
}
- (IBAction)cancelDownloadTouchUpInside:(id)sender {
self.downloadView.hidden=YES;
[connectionManager cancel];
connectionManager = nil;
downloadedMutableData = nil;
}
Does any one knows where is my problem?
UPDATE
I try to debug the app with nszombies using below instruction:
http://michalstawarz.pl/2014/02/22/debug-exc_bad_access-nszombie-xcode-5/
but the error do not accourd in this time.
UPDATE
I instanitiate the NSMutableData in my viewdidload method.
Also I try to instantiate it on the first line of downloadandCreatePath but still I see the error.
UPDATE
The error occurs after 2 time run and when I want to try initialize the connectionManager. I am wondering why after two time run and in the third try the problem occurs. Why it is not live after first run and in the second try?!!
update
I think below stack trace is better:
<_NSCallStackArray 0x94ee270>(
0 ??? 0x097c85cf 0x0 + 159155663,
1 MafatihTebyan 0x00010cb4 -[DoaShowViewController downloadandCreatePath:] + 404,
2 MafatihTebyan 0x000114be -[DoaShowViewController DisplayDoaPlayView:] + 94,
3 libobjc.A.dylib 0x0181f874 -[NSObject performSelector:withObject:withObject:] + 77,
4 UIKit 0x0057d0c2 -[UIApplication sendAction:to:from:forEvent:] + 108,
5 UIKit 0x00851c9b -[UIBarButtonItem(UIInternal) _sendAction:withEvent:] + 139,
6 libobjc.A.dylib 0x0181f874 -[NSObject performSelector:withObject:withObject:] + 77,
7 UIKit 0x0057d0c2 -[UIApplication sendAction:to:from:forEvent:] + 108,
8 UIKit 0x0057d04e -[UIApplication sendAction:toTarget:fromSender:forEvent:] + 61,
9 UIKit 0x006750c1 -[UIControl sendAction:to:forEvent:] + 66,
10 UIKit 0x00675484 -[UIControl _sendActionsForEvents:withEvent:] + 577,
11 UIKit 0x00674733 -[UIControl touchesEnded:withEvent:] + 641,
12 UIKit 0x005ba51d -[UIWindow _sendTouchesForEvent:] + 852,
13 UIKit 0x005bb184 -[UIWindow sendEvent:] + 1232,
14 UIKit 0x0058ee86 -[UIApplication sendEvent:] + 242,
15 UIKit 0x0057918f _UIApplicationHandleEventQueue + 11421,
16 CoreFoundation 0x01a1383f __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 15,
17 CoreFoundation 0x01a131cb __CFRunLoopDoSources0 + 235,
18 CoreFoundation 0x01a3029e __CFRunLoopRun + 910,
19 CoreFoundation 0x01a2fac3 CFRunLoopRunSpecific + 467,
20 CoreFoundation 0x01a2f8db CFRunLoopRunInMode + 123,
21 GraphicsServices 0x0303b9e2 GSEventRunModal + 192,
22 GraphicsServices 0x0303b809 GSEventRun + 104,
23 UIKit 0x0057bd3b UIApplicationMain + 1225,
24 MafatihTebyan 0x00008a2d main + 141,
25 libdyld.dylib 0x03c1d725 start + 0,
26 ??? 0x00000001 0x0 + 1
)
Important UPDATE
I noticed that the codes is not working on iOS 6 even at first call.In iOS 6 It keeps crashing all times.
UPDATE
All samples that I see for NSURLConnection are using viewdidload for creating request file. I am using it in a method and call this method again and again. because the url is changing at each call. May the problem about this?
Thanks for all replies and helps.
Finally as @quellish and @Kuldeep said in their comments. I noticed that the problem is not related to the NSURLConnection. It was because of the view that I was showing the download progress view that I create. Please see the second line of my question.
When I do not use it and instead of this view used MBProgressHUD my problem has been fixed.
Thanks to all friends for their reply.