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POWhy cant I pass this variable from one class to another
 

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  1. POWhy cant I pass this variable from one class to another
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    <p>I am stuck and need some help understanding why this is not working.</p> <p>I want to be able to download the HTML of a page and then format it to show correctly, the code inside the second class (spriing) will download and display the HTML in a UITextView if it is placed inside the ViewController, however this is breaking the MVC right?</p> <p>So could anyone tell me why I am getting the out of scope error on the mStringData variable?</p> <p>My classes are below:</p> <p>I have one class which is a view controller; </p> <pre><code>//Class for the download and processing of data from website #import "FirstViewController.h" @implementation FirstViewController // The designated initializer. Override to perform setup that is required before the view is loaded. //- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil { // if (self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]) { // // Custom initialization //} // return self; //} /* // Implement loadView to create a view hierarchy programmatically, without using a nib. - (void)loadView { } */ // Implement viewDidLoad to do additional setup after loading the view, typically from a nib. - (void)viewDidLoad { [super viewDidLoad]; spriing = [Spriing new]; [spriing downloadData:@"http://www.spriing.co.uk/services/"]; SpriingTxt.text = spriing.mStringData; } /* // Override to allow orientations other than the default portrait orientation. - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { // Return YES for supported orientations return (interfaceOrientation == UIInterfaceOrientationPortrait); } */ - (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 { // Release any retained subviews of the main view. // e.g. self.myOutlet = nil; } - (void)dealloc { [super dealloc]; [mRecData release]; [mStringData release]; } </code></pre> <p>And a separate class;</p> <pre><code>#import "Spriing.h" @implementation Spriing @synthesize mStringData; @synthesize mRecData; - (void)downloadData: (NSString*) URL{ mBaseURL = URL; // Create the request. NSURLRequest *request=[NSURLRequest requestWithURL:[NSURL URLWithString:mBaseURL] cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:60.0]; // create the connection with the request // and start loading the data mCon=[[NSURLConnection alloc] initWithRequest:request delegate:self]; if (mCon) { // create var to store data mRecData = [[NSMutableData data] retain]; } else { // Inform the user that the connection failed. } } //If the connection is reset - (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response { [UIApplication sharedApplication].networkActivityIndicatorVisible = YES; //reset the data length [mRecData setLength:0]; } //Obtaining new data - (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data { //Add any newly recieved data to the currently stored data [mRecData appendData:data]; } //If something went wrong - (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error { //Release the connection [mCon release]; //Release the data [mRecData release]; //Alert the user UIAlertView *alert = [[[UIAlertView alloc] initWithTitle:@"Error!" message:@"No internet connection!" delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil] autorelease]; [alert show]; [alert release]; } //When its done - (void)connectionDidFinishLoading:(NSURLConnection *)connection { //NSLog(@"finished"); // Once this method is invoked, "responseData" contains the complete result self.mStringData = [[[NSString alloc] initWithData:mRecData encoding:NSUTF8StringEncoding] retain]; //NSLog(@"%@", mStringData); self.mStringData = [self processData:mStringData]; //NSLog(@"%@", mStringData); //SpriingTxt.text = mStringData; [UIApplication sharedApplication].networkActivityIndicatorVisible = NO; //mStringData = nil; } - (NSURLRequest *)connection:(NSURLConnection *)connection willSendRequest:(NSURLRequest *)request redirectResponse:(NSURLResponse *)redirectResponse { [mBaseURL autorelease]; mBaseURL = [[request URL] retain]; return request; } -(NSString*) processData: (NSString*) string { NSMutableString *html = [NSMutableString stringWithCapacity:[string length]]; NSScanner *scanner = [NSScanner scannerWithString:string]; NSString *tempText = nil; while (![scanner isAtEnd]) { [scanner scanUpToString:@"&lt;" intoString:&amp;tempText]; if (tempText != nil) [html appendString:tempText]; [scanner scanUpToString:@"&gt;" intoString:NULL]; if (![scanner isAtEnd]) [scanner setScanLocation:[scanner scanLocation] + 1]; tempText = nil; } return html; } - (void) dealloc { [super dealloc]; //[mStringData release]; } @end </code></pre>
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