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• Password protect iPhone app

  - by Thomas

  I'm starting a new app, and I'd like to know how to require a password to open it. I've been researching on Google and the Apple Dev Forums and haven't found anything. I was considering a UIActionSheet, but am unsure how to go about doing so. I'm going to keep trying though. Any suggestions here are greatly appreciated. Thanks! Thomas

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• Changing color of the titlebar, background and text of MFMailComposeViewController

  - by iSharreth

  I am sending email from my iPhone application. Everything working fine, but I want to change the color of the title bar that appears from blue to black and the background color from white to black. Also, all the text to white color. What should I do? Anyone please help! I used the below code: (IBAction)sendMail{ MFMailComposeViewController *mailComposer = [[MFMailComposeViewController alloc]init]; mailComposer.mailComposeDelegate = self; if([MFMailComposeViewController canSendMail]){ [mailComposer setToRecipients: [NSArray arrayWithObjects:@"[email protected]",nil]]; [mailComposer setSubject: nil]; [mailComposer setMessageBody: nil isHTML:NO]; [self presentModalViewController:mailComposer animated: YES]; }

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• Trouble with data not saving with bindings and shared NSUserDefaults in IB

  - by Chief

  I'm having a bit of a strange issue that I can't quite figure out. I'm somewhat of a n00b to Interface Builder. What I am trying to do seems like it should be simple, but it's not working for some reason. In interface builder I have a preferences window with a simple NSTextField. I have set the value binding to the Shared User Defaults Controller with the controller key "values" and model key "test". I build/run my app and open the preferences window, type some random value into said text field, close the window. Command-Q the app. Then in a shell i do a "defaults read com.xxx.yyy" for my app and the key and value are nowhere to be found. That being said, it seems like the next time I fire up the app and change the value it works but only if I switch focus off of the NSTextField before closing the window. In the documentation for NSUserDefaults it says that the shared controller saves values immediately, am I missing something stupid here? Thanks for any help.

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• IOS - Performance Issues with SVProgressHUD

  - by ScottOBot

  I have a section of code that is producing pour performance and not working as expected. it utilizes the SVProgressHUD from the following github repository at https://github.com/samvermette/SVProgressHUD. I have an area of code where I need to use [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error]. I want to have a progress hud displayed before the synchronous request and then dismissed after the request has finished. Here is the code in question: //Display the progress HUB [SVProgressHUD showWithStatus:@"Signing Up..." maskType:SVProgressHUDMaskTypeClear]; NSError* error; NSURLResponse *response = nil; [self setUserCredentials]; // create json object for a users session NSDictionary* session = [NSDictionary dictionaryWithObjectsAndKeys: firstName, @"first_name", lastName, @"last_name", email, @"email", password, @"password", nil]; NSData *jsonSession = [NSJSONSerialization dataWithJSONObject:session options:NSJSONWritingPrettyPrinted error:&error]; NSString *url = [NSString stringWithFormat:@"%@api/v1/users.json", CoffeeURL]; NSURL *URL = [NSURL URLWithString:url]; NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:URL cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:30.0]; [request setHTTPMethod:@"POST"]; [request setValue:@"application/json" forHTTPHeaderField:@"Accept"]; [request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"]; [request setValue:[NSString stringWithFormat:@"%d", [jsonSession length]] forHTTPHeaderField:@"Content-Length"]; [request setHTTPBody:jsonSession]; NSData *data = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error]; NSString *dataString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]; NSDictionary *JSONResponse = [NSJSONSerialization JSONObjectWithData:[dataString dataUsingEncoding:NSUTF8StringEncoding] options:NSJSONReadingMutableContainers error:&error]; NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse *)response; NSInteger statusCode = httpResponse.statusCode; NSLog(@"Status: %d", statusCode); if (JSONResponse != nil && statusCode == 200) { //Dismiss progress HUB here [SVProgressHUD dismiss]; return YES; } else { [SVProgressHUD dismiss]; return NO; } For some reason the synchronous request blocks the HUB from being displayed. It displays immediately after the synchronous request happens, unfortunatly this is also when it is dismissed. The behaviour displayed to the user is that the app hangs, waits for the synchronous request to finish, quickly flashes the HUB and then becomes responsive again. How can I fix this issue? I want the SVProgressHUB to be displayed during this hang time, how can I do this?

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• How do I force one method to be executed before another method?

  - by RexOnRoids

  I've got 2 methods. One method starts playing an audio file (.mp3), the other method updates a UIToolBar to show a button (PLAY or PAUSE). These two methods are called in the following order: //Adds some UIBarButtonItems to a UIToolBar [self togglePlayer]; //Uses AVAudioPlayer [audioPlayer play]; I call the methods in the above order so that the (pause) button will be shown at the time the song starts playing. But, the problem is that the song starts playing first, and the UIToolBar remains unchanged for quite a while (from 2 to 5 secs) until the button is added and shown. What I want is for the button to be shown at the same time the song starts playing (i.e. NO DELAY). Is there any way to do this?

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• Removing Shine/Gloss effect on the iPhone through UIPrerenderedIcon not working on device

  - by hbStarkMuffie

  Hello all, I have tried to use the UIPrerenderedIcon/"Icon already includes gloss and bevel" on the Info.plist of my app and it worked perfectly on the Simulator, but not on the real device (iPod touch 2g). I have even tried to uninstall the app from the device, clean all builds but I still got the shine/gloss, that's really ruining my icon... Any thoughts? Best Regards, Muffie

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• [iPhone] How to make a neatly bordered webview popup

  - by Tristan

  Hey there, I'd like to open a UIWebView in a neat box in front of my iPhone. I've seen this done by Facebook Connect, when it opens the sign in page for Facebook. Does anyone know how to achieve this? Thanks, Tristan

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• how did you get into objective C?

  - by Lucas Della Bella

  how did you get into objective C? I'm trying to learn but every book I pick up is crap, and I can't find any videos (I'm a visual learner too)

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• iphone sdk - Itunes connect how to change device requirements?

  - by Dave

  What is it im supposed to set in the plist so that it shows that it does not work on the ipad on itunes? its somthing to do with this http://developer.apple.com/iphone/library/documentation/iPhone/Conceptual/iPhoneOSProgrammingGuide/AdvancedFeatures/AdvancedFeatures.html but I dont see anything that seems appropriate? Im still kind of noobish so I'd appreciate a really simple answer or as simple as possible. Thanks for your time

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• Plot Title/Annotation

  - by Kevin

  Hello, I want to add a title to my graph that gives a short description or name about the plot. For example, I have a table with a list of products and my graph shows how much those products cost. There should be a label/annotation superimposed on the graph that gives the name of the product.

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• UITableViewCell Custom accessory - get the row of accessory

  - by Emil

  Hi. I have a pretty big issue. I am trying to create a favorite-button on every UITableViewCell in a UITableView. That works very good, and I currently have an action and selector performed when pressed. accessory = [UIButton buttonWithType:UIButtonTypeCustom]; [accessory setImage:[UIImage imageNamed:@"star.png"] forState:UIControlStateNormal]; accessory.frame = CGRectMake(0, 0, 15, 15); accessory.userInteractionEnabled = YES; [accessory addTarget:self action:@selector(didTapStar) forControlEvents:UIControlEventTouchUpInside]; cell.accessoryView = accessory; And selector: - (void) didTapStar { UITableViewCell *newCell = [tableView cellForRowAtIndexPath:???]; accessory = [UIButton buttonWithType:UIButtonTypeCustom]; [accessory setImage:[UIImage imageNamed:@"stared.png"] forState:UIControlStateNormal]; accessory.frame = CGRectMake(0, 0, 26, 26); accessory.userInteractionEnabled = YES; [accessory addTarget:self action:@selector(didTapStar) forControlEvents:UIControlEventTouchDown]; newCell.accessoryView = accessory; } Now, here's the problem: I want to know what row the accessory that was pressed belongs to. How can I do this? Thank you :)

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• Binding the textDidChange event on a NSTextField to a MacRuby delegate

  - by kolrie

  I have a NSTextField within a Window and I created a very simple MacRuby delegate: class ServerInputDelegate attr_accessor :parent def textDidChange(notification) NSLog notification.inspect parent.filter end end And I have tried setting the control's delegate: I have tried setting the Window and every other object I could think of to this delegate. I have also tried setting it to other delegates (application for instance) and events like applicationDidFinishLaunching are being properly triggered. Is there any trick I am missing in order for this event to be triggered every time the contents of this NSTextField changes?

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• How do I properly embed third-party frameworks in my Cocoa application?

  - by Jordan Kay

  I am writing a Cocoa application that makes use of the ParseKit framework (http://www.parsekit.com/). I've included the Framework in the proper folder, added a Copy Files build phase, and added it to the build phase. I can build and launch the application on my Mac. However, when I try to run it on another Mac, it crashes. The Console shows the following error message: dyld: Library not loaded: /Users/Jordan/Files/ParseKit/build/Debug/ParseKit.framework/Versions/A/ParseKit It looks like when the app launches, it is looking for the framework on my local drive. However, the framework is in the Copy Files build phase, so it has been copied into that application's Contents/Frameworks folder. If if the application were looking in this folder, it would be able to load the framework just fine, but for some reason it's looking for it on my local drive on the original Mac (which obviously doesn't exist on the other Mac). What am I doing wrong?

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• multiple argument list with NS_REQUIRES_NIL_TERMINATION

  - by brigadir

  Hello I have a function -(id) func: params1, ... NS_REQUIRES_NIL_TERMINATION and2: params2, ... NS_REQUIRES_NIL_TERMINATION; Compiler says: error: expected `;' before 'and2' Is there any way to make function with 2 argument lists?

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• Can a ViewController (AdMob AdViewController) control a view that is a subview of the controlled vie

  - by RexOnRoids

  I am trying to use the IB AdMob ad in my app. I followed the instructions provided but I am getting an EXC_BAD_ACCESS from the AdMob class. I am trying to figure out what the problem is. Anyway, my question is Can a ViewController (AdMob AdViewController) control a view that is a subview of the controlled view of another UIViewController? Here is how I set it up: I start off with a UIViewController in IB. Step 1) I add a UIView sized 320 x 48 to the UIView controlled by the UIViewController. Step 2) I add an Object to the hierarchy (not under any other object). Step 3) I set the class of the Object to AdViewController (AdViewController.h of AdMob SDK) Step 4) I set connect the view outlet of the Object to the UIView of Step 1

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• How to identify WHICH NSURLConnection did finish loading when there are multiple ones?

  - by RexOnRoids

  Multiple NSURLConnections being started (in a single UIViewController) to gather different kinds of data. When they return (-connectionDidFinishLoading) I wanna do stuff with the data, depending on the type of data that has arrived. But one prob, HOW DO I KNOW WHICH NSURLConnection returned? I need to know so I can take action specific to the type of data that came. (Eg. display a twitter update if it was the twitter xml data)(Eg. display an image if it was a photo) How do people usually solve this?

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• collision detection in cocos2d.

  - by seenu

  i want to detect collision detection two times in same row. for example:-(see the below image) the ellipse and rectangle or detcted. after that my ellipse will travelling in the straight line path to down and detect the another rectangle. first one is( travelled in trajectory path ) working fine. second one i want to pass in straight line to down for collision detection. how to do this process.

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• Playing sounds in iPhone SDK?

  - by seanny94

  Does anyone have a snippet that uses the AudioToolBox framework that can be used to play a short sound? I would be grateful if you shared it with me and the rest of the community. Everywhere else I have looked doesn't seem to be too clear with their code. Thanks!

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• Why there is an invalid context error?

  - by Tattat

  Here is the code I use to draw: - (void) drawSomething { CGContextRef context = UIGraphicsGetCurrentContext(); CGContextSetRGBStrokeColor(context, 1, 0, 0, 1); CGContextSetLineWidth(context, 6.0); CGContextMoveToPoint(context, 100.0f, 100.0f); CGContextAddLineToPoint(context, 200.0f, 200.0f); CGContextStrokePath(context); NSLog(@"draw"); } But I got the error like this: [Session started at 2010-04-03 17:51:07 +0800.] Sat Apr 3 17:51:09 MacBook.local MyApp[12869] <Error>: CGContextSetRGBStrokeColor: invalid context Sat Apr 3 17:51:09 MacBook.local MyApp[12869] <Error>: CGContextSetLineWidth: invalid context Sat Apr 3 17:51:09 MacBook.local MyApp[12869] <Error>: CGContextMoveToPoint: invalid context Sat Apr 3 17:51:09 MacBook.local MyApp[12869] <Error>: CGContextAddLineToPoint: invalid context Sat Apr 3 17:51:09 MacBook.local MyApp[12869] <Error>: CGContextDrawPath: invalid context Why it prompt me to say that the context is invalided?

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• iPad application - Using Dock within an application

  - by sagar

  Hello ! Every one. I am interested in development of iPad applications. I have seen iPad Demo from Apple site. There is one new functionality - which is dock in iPad. My Question is "Can we use our own Dock control ( as we have - Tab bar in iPhone ) in iPad application? " If Answer is yes - Then my other question is How? Thanks in advance for sharing your knowledge. Sagar

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• Delay in playing a beep sound

  - by iSharreth

  -(IBAction)playSound{ AVAudioPlayer *myExampleSound; NSString *myExamplePath = [[NSBundle mainBundle] pathForResource:@"myaudiofile" ofType:@"caf"]; myExampleSound =[[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:myExamplePath] error:NULL]; myExampleSound.delegate = self; [myExampleSound play]; } I want to play a beep sound when a button is clicked. I had used the above code. But it is taking some delay in playing the sound. Anyone please help.

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• UILabel not updating

  - by iFloh

  Sorry the basic question, but this bugs me for a while now. I create a details view from a UITable and try to dynamically set its labels, but they are not updating: - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { myObject *tmpObj = [[myObject objectAtIndex:indexPath.section] objectAtIndex:indexPath.row]; myViewController *tmpVC = [[myViewController alloc] initWithNibName:@"NIBfile" bundle:nil]; [tmpVC.myLabel setText:tmpObj.myTitle]; // The debugger shows the text: myTitle = "myText" NSLog(@"%@", tmpVC.myLabel); // NSLog SHOWS NULL [self.navigationController pushViewController:tmpVC animated:YES]; [tmpObj release]; } any ideas why the value is not coming through?

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• Why doesn't genstrings convert NSLocalizedStringFromTable entries to table.strings?

  - by juan tendero

  In my source code I have some lines like NSLocalizedStringFromTable(@"Info", @"en", @"Title of this view"). When I subsequently call genstrings -o en.lproj ./Classes/*.m I would not get the expected file en.strings but Localized.strings, although I've read in the genstrings-manpage that it would generate a table.strings file from NSLocalizedStringFromTable(a, table, c) function. Am I wrong? How would I create a table.strings file then?

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• Allowing user to select a UIPickerView row by tapping.

  - by camilo

  Hi. I'm trying to use a UIPicker View with a behavior somehow different of what's usually seen in iPhone code examples. What I want to do is to allow users to scroll through the picker contents, but not to select a picker's row automatically (using the "didSelectRow" method from picker's delegate). Instead, I want to allow the user to touch the center row of the picker, which gets highlighted, and becomes the selection. Is there any way to achieve this? Thanks in advance.

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• Adding a UIBarButtonItem to a programattically allocated UINavigationBar

  - by iamdadude

  I have a cameraoverlayview that allocates a UINavigationBar to the top of the screen like this - CGRect navbarFrame = CGRectMake(0, 0, 320, 44); navigationBar = [[UINavigationBar alloc] initWithFrame:navbarFrame]; navigationBar.delegate = self; Now I want to add a UIBarButtonItem as the left button to the navigation bar, but the standard navigationbar.leftitem doesn't work. So I tried doing this - closebutton = [[UIBarButtonItem alloc] initWithTitle:closebuttontext style:UIBarButtonItemStylePlain target:self action:@selector(close)]; navigationBar.topItem.leftBarButtonItem = closebutton; But it doesn't work either. Can anyone point me in the right direction? As far as the navigation bar loading up correctly in the cameraoverlayview, it works 100%.

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