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  • Location of the object after scrolling in UIScrollView

    - by ludo
    Hi, I have a scrollView (width:320px height:100px) on my UIView, inside it I add 10 images with width:106.5px each. After that I use this function to have 3 different parts inside my scrollView, so everytime I scroll, an image will automatically be center. -(void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate { [self returnToPosition:self.scrollView]; } -(void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView { [self returnToPosition:self.scrollView]; } -(void)returnToPosition:(UIScrollView *)scrollView { CGFloat itemWidth = 106.5f; CGFloat position = [self.scrollView contentOffset].x; CGFloat newPosition = 0.0f; CGFloat offSet = position / itemWidth; NSUInteger target = (NSUInteger)(offSet + 0.5f); newPosition = target * itemWidth; [self.scrollView setContentOffset:CGPointMake(newPosition, 0.0f) animated:YES]; } Here is my question, I want to be able to know which image will be in the middle position after the user scroll the View, because I want to display on my UIView a text, specific to that image. But I don't know how to do that. Some Ideas?

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  • How to create Dictionary object in AppDelegate to access objectkey in another ViewController

    - by TechFusion
    Hello, I have created Window Based application and tab bar controller as root controller. My objective is to store Text Field data values in one tab bar VC and will be accessible and editable by other VC and also retrievable when application start. I am looking to use NSDictionary class in AppDelegate so that I can access stroed Data Values with keys. //TestAppDelegate.h @interface { ..... .... NSDictionary *Data; } @property (nonatomic, retain) NSDictionary *Data; //TestAppDelegate.m #import "TestAppDelegate.h" NSString *kNamekey =@"Namekey"; NSString *kUserIDkey =@"UserIDkey"; NSString *kPasswordkey =@"Passwordkey"; @implemetation TestAppDelegate @synthesize Data; -(void)applicationDidFinishLaunching:(UIApplication)application { NSString *NameDefault; NSString *UserIDdefault; NSString *Passworddefault; NSString *testvalue = [[NSUserDefaults standardUserDefaults] stringForKey: kNamekey]; if(testvalue == nil) { NSDictionary *appDefaults = [NSDictionary dictionaryWithObjectsAndKeys: NameDefault, kNamekey, UserIdefault kUserIDkey, Passwordefault kPasswordkey, nil]; self.Data = appDefaults; [[NSUserDefaults standardUserDefaults] registerDefaults:appDefaults]; [[NSUserDefaults standardUserDefaults] synchronize]; } else { } } Here ViewController is ViewController of Navigation Controller which is attached with one tab bar.. I have attached xib file with ViewController //ViewController.h @interface IBOutlet UITextField *Name; IBOutlet UITextField *UserId; IBOutlet UITextField *Password; } @property(retain,nonatomic) IBOutlet UITextField *Name @property(retain,nonatomic) IBOutlet UITextField *UserId; @property(retain,nonatomic) IBOutlet UITextField *Password; -(IBAction)Save:(id)sender; @end Here in ViewController.m I want to store Text Field input data with key which are defined in AppDelegate. I have linked Save Barbutton with action. Here I am not getting how to access NSDictionary class with object and keys in ViewController. //ViewController.m -(IBAction)Save:(id)sender{ TestAppDelegate *appDelegate = (TestAppDelegate*)[[UIApplication sharedApplication] delegate]; //Here how to access knamekey here to set object(Name.test) value with key } Please guide me about this. Thanks,

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  • Problems in getting data from CFStreamCreatePairWithSocketToHost

    - by gkedmi
    Hi I'm building an iPhoe app with a socket to a PC app , I need to get an image from this PC app. It's my first time using "CFStreamCreatePairWithSocketToHost".After I establish the socket with "NSOperation" I call CFStreamClientContext streamContext = {0, self, NULL, NULL, NULL}; BOOL success = CFReadStreamSetClient(myReadStream, kMyNetworkEvents,MyStreamCallBack,&streamContext); CFReadStreamScheduleWithRunLoop(myReadStream, CFRunLoopGetCurrent(), kCFRunLoopDefaultMode); then I call CFWriteStreamWrite(myWriteStream, &writeBuffer, 3); // Open read stream. if (!CFReadStreamOpen(myReadStream)) { // Notify error } . . . while(!cancelled && !finished) { SInt32 result = CFRunLoopRunInMode(kCFRunLoopDefaultMode, 0.25, NO); if (result == kCFRunLoopRunStopped || result == kCFRunLoopRunFinished) { break; } if (([NSDate timeIntervalSinceReferenceDate] - _lastRead) MyConnectionTimeout) { // Call timed out cancelled = YES; break; } // Also handle stream status CFStreamStatus status = CFReadStreamGetStatus(myReadStream); } and then when I get "kCFStreamEventHasBytesAvailable" I use while (CFReadStreamHasBytesAvailable(myReadStream)) { CFReadStreamRead(myReadStream, readBuffer, 1000); //and buffer the the bytes } It's unpredictable , sometimes I get the whole picture , sometime I got just part of it , and I can't understand what make the different. can someone has an idea what is wrong here? thanks

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  • Newbie: UINavigationController is pulling me back from further learning :(

    - by nithin
    I have created a window-based application and my problem is I am unable to create UINavigationController on the go. InFact I don't know how to do that. My AppDelegeate - (void)applicationDidFinishLaunching:(UIApplication *)application { // Override point for customization after application launch [window addSubview:logInView.view]; [window makeKeyAndVisible]; } here the logInView is an object of @interface LogInViewController : UIViewController { IBOutlet UITextField *usernameField; IBOutlet UITextField *passwordField; IBOutlet UIButton *logInButton; } -(IBAction) logInClick:(id) sender; from the click action of this loginviewcontroller It should be showing the home screen with navigation controller. and I have to add many subviews. My question is where should I init the UINavigationController and where could I write the codes for adding subviews? how to map it with interfacebuilder?

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  • Access variables from a number of sources

    - by mac_55
    I'm creating my first game, and I've currently set up a 'GameState' class, to store player health etc. inside. This class is currently instantiated from the AppDelegate as I need to access it from all over my game. This is fine. For each class I'm working in, I can access the app delegate, and then find the GameState object... however, it seems very messy. I'm tempted to find a way (I'm still a newbie) to define the GameState instance as being some sort of global variable so that I can access it from all over with ease... but my little bit of reading on variable scope makes me uneasy about doing this, even if I knew how. Any ideas of the best way to define and access this class? It'll be used for everything from player health, to items they've found, any personalisation etc. Thanks!

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  • Forwarding first responder to UIScrollView unsuccessful

    - by Winston
    Hello, I am trying to create an image cropping bpx whereby the underlying image can be zoomed an scrolled while the cropping "maskview" layer stays the same and the corners can be dragged in any direction. To achieve this, the ImageView is added to a UIScrollView, and this is added to the SelectionViewController.view . I then add the cropping "maskview" layer to the SelectionViewController.view. I did this instead of adding to the scrollview so that the cropping maskview won't be expanded when the underlying image expands. @interface SelectionViewController : UIViewController <UIScrollViewDelegate> { UIImageView *photoview; // Added to self.scrollview MaskedView *maskedview; // Added to self.view UIScrollView *scrollview; // Added to self.view } The maskview has first responder status and responds accordingly. However, the only event I am interested in the maskview is if any of the corners are dragged (this works fine). The problem I want to try to solve is two-fold: If it is a pinch or zoom gesture, I am trying to forward the responder to the UIScrollview using: [self.nextResponder touchesMoved:touches withEvent:event]; The scrollview does not seem to respond. I have confirmed that the self.nextResponder after the maskedview is the SelectionViewController's view itself. From there, it doesn't seem like the UIScrollview responds. It does respond fine if I remove the cropping maskedview. If I zoom in on the underlying image and the cropping maskview rectangle is still the same, I want to now crop the actual zoomed image. Let's say for the upper left hand corner of the crop box, how can I find what the coordinates translates to in the underlying UIImageView now that the image has been zoomed? Any insight into either of these questions would be appreciated. Thank you, Winston

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  • Presenting a Popover From a Rect Problem

    - by Sheehan Alam
    I have a UITableViewCell that has some labels and images that can be clicked. I want to present a popover whenever a user clicks on any part of the cell. How can I achieve this without interfering with the click actions of the labels & images? I am currently creating an invisible button ontop of some other clickable items in the cell and calling the popover: [replyPopover presentPopoverFromRect:CGRectMake(77, 25, 408, 68) inView:self permittedArrowDirections: UIPopoverArrowDirectionDown animated:YES]; Unfortunately, because the button is on top of the labels & images I am unable to click them. How can I show a popover by clicking on the background of a cell, so that there is no interference when clicking images & labels inside the cell?

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  • How to detect when a device is heading towards a certain location?

    - by Tiger
    Hi, How can I detect when a device is heading towards a certain location? Lets say I have 2 locations- the devices current location, and a location of some restaurant for example- I would like to detect when the device is heading towards that restaurant. (I asked this before with no answers- I thought maybe if I'll rephrase the question...) Thanks.

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  • Two PickerViews in save View issue?

    - by NextRev
    I'm trying to have 2 pickerviews in the same view. It works except for two things. If one pickerview has more rows than the other the app crashes when picking an item from the pickerview with more items. Also I created an NSLog for the pickerviews and the console shows that I'm picking two items at once when in fact i'm only dealing with one pickerview. I know it sounds a bit confusing but I'm including all the code. Thank you in advance. list and list2 are NSMutableArrays list has 4 items list2 has 5 items There error: * Terminating app due to uncaught exception 'NSRangeException', reason: '* -[NSCFArray objectAtIndex:]: index (4) beyond bounds (4)' -(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)thePickerView{ if([thePickerView isEqual:pickerView1 ]){ return 1; } else if([thePickerView isEqual:pickerView2]){ return 1; } else{ return 0; } } -(NSInteger)pickerView:(UIPickerView *)thePickerView numberOfRowsInComponent:(NSInteger)component{ if([thePickerView isEqual:pickerView1 ]){ return [list count]; } else if([thePickerView isEqual:pickerView2]){ return [list2 count]; } else{ return 0; } } -(NSString *)pickerView:(UIPickerView *)thePickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component{ if([thePickerView isEqual:pickerView1 ]){ return [list objectAtIndex:row]; } else if([thePickerView isEqual:pickerView2]){ return [list2 objectAtIndex:row]; } else{ return 0; } } - (void)pickerView:(UIPickerView *)thePickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component { NSLog(@"Selected item %@. Index of selected item:%i", [list objectAtIndex:row], row); NSLog(@"Selected item %@. Index of selected item:%i", [list2 objectAtIndex:row], row); NSLog(@"Selected item %@. Index of selected item:%i", [list3 objectAtIndex:row], row); if([thePickerView isEqual:pickerView1 ]){ //Do Something } else if([thePickerView isEqual:pickerView2 ]){ //Do Something } else if([thePickerView isEqual:pickerView3 ]){ //Do Something } }

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  • Foundation framework. No NSString.h file

    - by pawelini1
    Hello I'm getting a few errors just after I updated my working copy via SVN. /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator3.2.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:8:0 /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator3.2.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:8:32: error: Foundation/NSString.h: No such file or directory /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator3.2.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:45:0 /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator3.2.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:45: error: expected ')' before 'unichar' /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator3.2.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSPathUtilities.h:10:0 /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator3.2.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSPathUtilities.h:10: error: cannot find interface declaration for 'NSString' All that errors tell that compiler is unable to find NSString.h file in Foundation framework and I have opened the Foundation framework in Xcode/Frameworks/Foundation.framework/Headers and noticed that there is no NSString header file there. Could anyone tell me what happened? I tried to delete the framework and add it again but it failed to. Still I don't have NSString header file.

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  • Initial text and paperclipped-URL for action in UIActivityViewController & UIActivityItemSource?

    - by Benjamin Kreeger
    Finally been making it through Apple's (rather dismal) documentation on the new UIActivityViewController class and the UIActivityItemSource protocol, and I'm trying to send different data sets to different actions called from the activity view. To simplify things, I'm looking at two things. A Facebook posting action, which should say "Check this out!" and also attach a URL to the post (with that cute little paperclip). A Twitter posting action, which should say "Check this out, with #hashtag!" and also attach that same URL (with the same paperclip). Here's the code I've got implemented right now. - (id)activityViewController:(UIActivityViewController *)activityViewController itemForActivityType:(NSString *)activityType { if ([activityType isEqualToString:UIActivityTypePostToFacebook]) { return @"Check this out!"; } else if ([activityType isEqualToString:UIActivityTypePostToTwitter]) { return @"Check this out, with #hashtag!"; } return @""; } - (id)activityViewControllerPlaceholderItem:(UIActivityViewController *)activityViewController { return @""; } And then when I set up this activity view controller (it's in the same class), this is what I do. UIActivityViewController *activityView = [[UIActivityViewController alloc] initWithActivityItems:@[self] applicationActivities:nil]; [self presentViewController:activityView animated:YES completion:nil]; My dilemma is how to attach that NSURL object. It's relatively easy when calling the iOS 6 SL-class posting modals; you just call the individual methods to attach a URL or an image. How would I go about doing this here? I'll note that instead of returning NSString objects from -activityViewController:itemForActivityType, if I return just NSURL objects, they show up with that paperclip, with no body text in the post. If I return an array of those two items, nothing shows up at all.

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  • Subclass of UIView with Xib file.

    - by rdesign
    Hey guys, Although I've searched the Board and used google, I didn't get any useful results. I've trying to make a subclass of UIView loading its view from a xib file. My approach is the following: 1. Creating a subclass (named mySubclass): @interface mySubclass : UIView { } @end Creating a view through: Add New File... User Interface View XIB Connecting the Xib and the subclass: In IB select the View and set the class to mySubclass. In my viewController I make an instance of my new subclass and add to my view. -(void)viewDidLoad { mySubclassIns = [[mySubclass alloc] initWithFrame:CGRectMake(0, 0, 320, 460)]; [self.view addSubview:mySubclassIns]; [super viewDidLoad]; } Result: Noting shows up in my App :( If I don't set it up programmatically but rather with IB it doesn't work either. (Am I setting it up right when choosing a view in IB and set the class to myClass?) I would be really thankful for your help! Thanks in advance.

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  • Equivalent of CGPoint with integers?

    - by Ivan Vucica
    Cheers, I like strict typing in C. Therefore, I don't want to store a 2D vector of floats if I specifically need integers. Is there an Apple-provided equivalent of CGPoint which stores data as integers? I've implemented my type Vector2i and its companion function Vector2iMake() à la CGPoint, but something deep in me screams that Apple was there already.

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  • Equivalent of CGPoint with integers?

    - by Ivan Vucica
    Cheers, I like strict typing in C. Therefore, I don't want to store a 2D vector of floats if I specifically need integers. Is there an Apple-provided equivalent of CGPoint which stores data as integers? I've implemented my type Vector2i and its companion function Vector2iMake() à la CGPoint, but something deep in me screams that Apple was there already.

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  • Storing high precision latitude/longitude numbers in iOS Core Data

    - by Bryan
    I'm trying to store Latitude/Longitudes in core data. These end up being anywhere from 6-20 digit precision. And for whatever reason, i had them as floats in Core Data, its rounding them and not giving me the exact values back. I tried "decimal" type, with no luck either. Are NSStrings my only other option? EDIT NSManagedObject: @interface Event : NSManagedObject { } @property (nonatomic, retain) NSDecimalNumber * dec; @property (nonatomic, retain) NSDate * timeStamp; @property (nonatomic, retain) NSNumber * flo; @property (nonatomic, retain) NSNumber * doub; Here's the code for a sample number that I store into core data: NSNumber *n = [NSDecimalNumber decimalNumberWithString:@"-97.12345678901234567890123456789"]; Code to access it again: NSNumber *n = [managedObject valueForKey:@"dec"]; NSNumber *f = [managedObject valueForKey:@"flo"]; NSNumber *d = [managedObject valueForKey:@"doub"]; Printed values: Printing description of n: -97.1234567890124 Printing description of f: <CFNumber 0x603f250 [0xfef3e0]>{value = -97.12345678901235146441, type = kCFNumberFloat64Type} Printing description of d: <CFNumber 0x6040310 [0xfef3e0]>{value = -97.12345678901235146441, type = kCFNumberFloat64Type}

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  • OpenGL ES clarifying question regarding FBOs -- sorry can't find this info anywhere else?

    - by DevDevDev
    If I instantiate an FBO without binding a rendering buffer or a texture to it, what happens when I draw to it, nothing? Do I need to associate a rendering target (renderbuffer or texture) to have an FBO do anything? What I'm trying to do is precache some buffers and then merge them later, but that doesn't seem to work at all. Ideally I'd like to do something like glBindFramebufferOES(GL_FRAMEBUFFER_OES, fbo1); // Draw some stuff to fbo1 glBindFramebufferOES(GL_FRAMEBUFFER_OES, fbo2); // Draw some stuff to fbo2 // ... // ... // glRenderFbo(fbo1); -- Not a func // Set blending, etc. etc. // glRenderFbo(fbo2); -- Not a func

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  • UITableView and keyboard scrolling problem

    - by Jonathan
    after a lot of trial and error, I'm giving up and asking the question. I've seen a lot of people with similar problems but can't get all the answers to work right. I have a UITableView which is composed of custom cells. The cells are made of 5 text fields next to each other (sort of like a grid). When I try to scroll and edit the cells at the bottom of the UITableView, I can't manage to get my cells properly positioned above the keyboard. I have seen many answers talking about changing view sizes,etc... but none of them has worked nicely so far. Could anybody clarify the "right" way to do this with a concrete code example? Thanks in advance, Jonathan

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  • The dealloc method is not called in the present modal view contrller.

    - by Madan Mohan
    It is in My view controller -(void)doctorsListAction { if(isFirst == YES) { [self getDoctorsListController]; [[self navigationController] presentModalViewController:doctorListViewNavigationController animated:YES]; [doctorListViewController release]; } } -(void)getDoctorsListController { //DoctorListViewController *doctorListViewController=[[[DoctorListViewController alloc]initWithNibName:nil bundle:nil]autorelease]; doctorListViewController=[[DoctorListViewController alloc]init]; doctorListViewNavigationController=[[UINavigationController alloc]initWithRootViewController:doctorListViewController]; doctorListViewController.doctorList=doctorList; doctorListViewNavigationController.navigationBar.barStyle= UIBarStyleBlackOpaque; [doctorListViewController release]; } It is in DoctorListViewContrller -(void)closeAction { printf("\n hai i am in close action*******************************"); //[doctorList release]; //[myTableView release]; //myTableView=nil; printf("\n myTableView retainCount :%d",[myTableView retainCount]); [[self navigationController] dismissModalViewControllerAnimated:YES]; } //this method is not called I don't know why if it not called i will get memory issues - (void)dealloc { printf("\n hai i am in dealloc of Doctor list view contrller"); [doctorList release]; [myTableView release]; myTableView=nil; [super dealloc]; }

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  • how to know email address of sender

    - by maddy
    hi, how to know email-Id of sender using MFmailComposerView controller.My requirement is to get all email-Id's who are sending mails using my application. i tried by adding Bcc to my mail-Id. But it may erase by user(sender), so i will not get his/her mail-Id. So how to overcome this issue. is it possible to get email-Id's of all using our Application

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  • Unable to use NSURLConnection to get contents of password/username protected webpage

    - by bubster
    I am trying to get the contents of a webpage that requires a password and user name to access. I am using a NSURLConnection object to get it however when I write the NSMutableData object that is returned to a file all I get is the login page. Normally when you try to load the password protected page when you are not logged in it redirects to the login page however I thought that if I provided valid credentials then this I would be able to view the password protected page. Also I do not know if it is relevant the website is using a microsoft mysql database on an IIS (internet information server). Note: [protectionSpace authenticationMethod] returns NSURLAuthenticationMethodServerTrust I am pretty unfamiliar with this so any ideas would be greatly appreciated. Below is all of the relevant code: - (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response { // This method is called when the server has determined that it // has enough information to create the NSURLResponse. // It can be called multiple times, for example in the case of a // redirect, so each time we reset the data. // receivedData is an instance variable declared elsewhere. [receivedData setLength:0]; } - (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data { // Append the new data to receivedData. // receivedData is an instance variable declared elsewhere. [receivedData appendData:data]; } - (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error { // release the connection, and the data object //[connection release]; // receivedData is declared as a method instance elsewhere //[receivedData release]; // inform the user NSLog(@"Connection failed! Error - %@ %@", [error localizedDescription], [[error userInfo] objectForKey:NSURLErrorFailingURLStringErrorKey]); } - (void)connectionDidFinishLoading:(NSURLConnection *)connection { // do something with the data // receivedData is declared as a method instance elsewhere NSLog(@"Succeeded! Received %d bytes of data",[receivedData length]); // release the connection, and the data object //[connection release]; //[receivedData release]; //Write data to a file [receivedData writeToFile:@"/Users/matsallen/Desktop/receivedData.html" atomically:YES]; } - (BOOL)connection:(NSURLConnection *)connection canAuthenticateAgainstProtectionSpace: (NSURLProtectionSpace *)protectionSpace { NSLog(@"The connection encountered a protection space. The authentication method is %@", [protectionSpace authenticationMethod]); secureTrustReference = [protectionSpace serverTrust]; //SecTrustResultType *result; //OSStatus status = SecTrustEvaluate(secureTrustReference, result); //NSLog(@"Result of the trust evaluation is %@",status); return YES; } - (void)connection:(NSURLConnection *)connection didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge { NSURLCredential *newCredential; newCredential = [NSURLCredential credentialWithUser:@"username" password:@"password" persistence:NSURLCredentialPersistenceForSession]; newCredential = [NSURLCredential credentialForTrust:secureTrustReference]; // [[challenge sender] useCredential:newCredential forAuthenticationChallenge:challenge]; // [[challenge sender] continueWithoutCredentialForAuthenticationChallenge:challenge]; } #pragma mark - View lifecycle - (void)viewDidLoad { receivedData = [[NSMutableData alloc] init]; [super viewDidLoad]; // Do any additional setup after loading the view, typically from a nib. // Create the request. NSURLRequest *theRequest=[NSURLRequest requestWithURL:[NSURL URLWithString:@"https://www.markallenonline.com/secure/maoCoaching.aspx"] cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:60.0]; // create the connection with the request // and start loading the data NSURLConnection *theConnection=[[NSURLConnection alloc] initWithRequest:theRequest delegate:self]; if (theConnection) { // Create the NSMutableData to hold the received data. // receivedData is an instance variable declared elsewhere. receivedData = [NSMutableData data]; NSLog(@"Connection succeeded!"); } else { // Inform the user that the connection failed. NSLog(@"Connection failed!"); } }

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