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POApplication Crashes. :(
 

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  1. POApplication Crashes. :(
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    <p>I'm creating an app with login window. The application builds successfully but as soon as I touch the login button, the application crashes. :(</p> <p>I've pasted the .m file below.</p> <p>Where am I making the mistake? :(</p> <p>Thanks in Advance:)</p> <pre><code>#import "AuthViewController.h" @implementation AuthViewController @synthesize userName; @synthesize password; @synthesize loginbutton; @synthesize indicator; - (IBAction) loginButton: (id) sender { indicator.hidden = NO; [indicator startAnimating]; loginbutton.enabled = NO; // Create the username and password string. // username and password are the username and password to login with NSString *postString = [[NSString alloc] initWithFormat:@"username=%@&amp;password=%@",userName, password]; // Package the string in an NSData object NSData *requestData = [NSData dataWithBytes: [postString UTF8String] length: [postString length]]; // Create the URL request NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL: [NSURL URLWithString:@"http://localhost/dologin.php"]]; // create the URL request [request setHTTPMethod: @"POST"]; // you're sending POST data [request setHTTPBody: requestData]; // apply the post data to be sent // Call the URL NSURLResponse *response; // holds the response from the server NSError *error; // holds any errors NSData *returnData = [NSURLConnection sendSynchronousRequest: request returningResponse:&amp;response error:&amp;error]; // call the URL /* If the response from the server is a web page, dataReturned will hold the string of the HTML returned. */ NSString *dataReturned = [[NSString alloc] initWithData:returnData encoding:NSASCIIStringEncoding]; alertWithOkButton = [[UIAlertView alloc] initWithTitle:@"Status..." message:@"%@",dataReturned cancelButtonTitle:@"Okay", nil]; [alertWithOkButton show]; [alertWithOkButton release]; } -(IBAction)dismissKeyboard: (id)sender { [sender resignFirstResponder]; } /* // The designated initializer. Override if you create the controller programmatically and want to perform customization that is not appropriate for viewDidLoad. - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil { if ((self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil])) { // Custom initialization } return self; } */ /* // Implement viewDidLoad to do additional setup after loading the view, typically from a nib. - (void)viewDidLoad { [super viewDidLoad]; } */ /* // 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 { [super viewDidUnload]; // Release any retained subviews of the main view. // e.g. self.myOutlet = nil; } - (void)dealloc { [super dealloc]; } @end </code></pre> <p>The header/.h File:</p> <pre><code>#import &lt;UIKit/UIKit.h&gt; @interface AuthViewController : UIViewController { IBOutlet UITextField *userName; IBOutlet UITextField *password; IBOutlet UIButton *loginbutton; IBOutlet UIActivityIndicatorView *indicator; UIAlertView *alertWithOkButton; UIAlertView *alertWithYesNoButtons; } @property (nonatomic, retain) UITextField *userName; @property (nonatomic, retain) UITextField *password; @property (nonatomic, retain) UIButton *loginbutton; @property (nonatomic, retain) UIActivityIndicatorView *indicator; - (IBAction)dismissKeyboard: (id)sender; - (IBAction) loginButton: (id) sender; @end </code></pre>
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    1. USAniruddh Joshi
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      1. POApplication Crashes. :(
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      1. VTUpMod
    1. COWhat's the error message? Where is it crashing? Is your alertWithOkButton declared as a variable? If not you need to change that line of code to UIAlertView *alertWithOkButton = ...
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      1. POApplication Crashes. :(
      1. USRog
    2. COThe simulator runs fine but as soon as I click login button, the status bar shows 'GDB Program received signal: 'SIGABRT'.
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      1. POApplication Crashes. :(
      1. USAniruddh Joshi
    3. CO@Aniruddh Yeah, that error seems to fit with the problem outlined in my answer.
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      1. POApplication Crashes. :(
      1. USJacob Relkin
 

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