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  • [Iphone] - Problem in saving file using NSCoding

    - by Matte Gary
    Hi everybody, I've a problem with Iphone programming... I've a NSMutableArray containing object of type "MyClass". MyClass has some parameters, like NSNumber and NSString. I've followed the Apple Tutorial about coding and decoding object using NSCoding, but when I try to decode the file I've stored, the NSMutableArray contain object of type "MyClass", but with wrong parameters. I think i've done all I've to do (including protocol, including methods like initwithencode etc), but it's still not working... Any suggestions? Thanks a lot! And sorry for my English XD

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  • Navigation bat not displayed at top of page. What's wrong?

    - by Eytan
    I'm having what appears to be a simple problem. I declare a navigation controller but the navigation bar that comes up is not displayed at the top of the page. http://sphotos.ak.fbcdn.net/hphotos-ak-snc3/hs410.snc3/24784_889732028002_28110599_54506042_4580563_n.jpg I declare the navigation controller like so... UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:setupViewController]; [self.view addSubview:navController.view]; Any ideas?

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  • How do I search using the Google Maps API?

    - by Thomas
    Hello all, I'm trying to figure out how to search for nearby businesses in an iPhone app using the Google Maps API. I'm completely new to Javascript, and have waded through some of Google's sample code easily enough. I found how to grab the user's current location. Now I want to search for "restaurants" near that location. I'm just building on the sample code from here. I'll post it below with my changes anyway, just in case. <html> <head> <meta name="viewport" content="initial-scale=1.0, user-scalable=no" /> <meta http-equiv="content-type" content="text/html; charset=UTF-8"/> <title>Google Maps JavaScript API v3 Example: Map Geolocation</title> <script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=true"></script> <script type="text/javascript" src="http://code.google.com/apis/gears/gears_init.js"></script> <script type="text/javascript"> var currentLocation; var detroit = new google.maps.LatLng(42.328784, -83.040877); var browserSupportFlag = new Boolean(); var map; var infowindow = new google.maps.InfoWindow(); function initialize() { var myOptions = { zoom: 6, mapTypeId: google.maps.MapTypeId.ROADMAP }; map = new google.maps.Map(document.getElementById("map_canvas"), myOptions); map.enableGoogleBar(); // Try W3C Geolocation method (Preferred) if(navigator.geolocation) { browserSupportFlag = true; navigator.geolocation.getCurrentPosition(function(position) { // TRP - Save current location in a variable (currentLocation) currentLocation = new google.maps.LatLng(position.coords.latitude,position.coords.longitude); // TRP - Center the map around current location map.setCenter(currentLocation); }, function() { handleNoGeolocation(browserSupportFlag); }); } else { // Browser doesn't support Geolocation browserSupportFlag = false; handleNoGeolocation(browserSupportFlag); } } function handleNoGeolocation(errorFlag) { if (errorFlag == true) { // TRP - Default location is Detroit, MI currentLocation = detroit; contentString = "Error: The Geolocation service failed."; } else { // TRP - This should never run. It's embedded in a UIWebView, running on iPhone contentString = "Error: Your browser doesn't support geolocation."; } // TRP - Set the map to the default location and display the error message map.setCenter(currentLocation); infowindow.setContent(contentString); infowindow.setPosition(currentLocation); infowindow.open(map); } </script> </head> <body style="margin:0px; padding:0px;" onload="initialize()"> <div id="map_canvas" style="width:100%; height:100%"></div> </body> </html>

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  • Subclassing NSArrayController in order to limit size of arrangedObjects

    - by Simone Manganelli
    I'm trying to limit the number of objects in an array controller, but I still want to be able to access the full array, if necessary. A simple solution I came up with was to subclass NSArrayController, and define a new method named "limitedArrangedObjects", that returns a limited number of objects from the real set of arranged objects. (I've seen http://stackoverflow.com/questions/694493/limiting-the-number-of-objects-in-nsarraycontroller , but that doesn't address my problem.) I want this property to be observable via bindings, so I set a dependency to arrangedObjects on it. Problem is, when arrangedObjects is updated, limitedArrangedObjects seems not to be observing the value change in arrangedObjects. I've hooked up an NSCollectionView to limitedArrangedObjects, and zero objects are being displayed. (If I bind it to arrangedObjects instead, all the objects show up as expected.) What's the problem? Here's the relevant code: @property (readonly) NSArray *limitedArrangedObjects; - (NSArray *)limitedArrangedObjects; { NSArray *arrangedObjects = [super arrangedObjects]; NSUInteger upperLimit = 10000; NSUInteger count = [arrangedObjects count]; if (count > upperLimit) count = upperLimit; arrayToReturn = [arrangedObjects subarrayWithRange:NSMakeRange(0, count)]; return arrayToReturn; } + (NSSet *)keyPathsForValuesAffectingValueForKey:(NSString *)key; { NSSet *keyPaths = [super keyPathsForValuesAffectingValueForKey:key]; if ([key isEqualToString:@"limitedArrangedObjects"]) { NSSet *affectingKeys = [NSSet setWithObjects:@"arrangedObjects",nil]; keyPaths = [keyPaths setByAddingObjectsFromSet:affectingKeys]; } return keyPaths; }

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  • Turning Separate iPad/iPhone Targets into Universal App

    - by ckrames1234
    I, when I got my hands on the iPad SDK Beta, thought the universal binary would be to much work, so i opted for the separate targets. I realized halfway through making the iPad portion of my app, that making a universal application would be easy as pie. The issue is, I can't use Apple's option to convert my iPhone Target to Universal. The only thing that I would need to do in the Info.plist of the universal application would be to set a different MainWindow. How could I approach the problem? Is there a workaround to get Apple's way to work (maybe by deleting the existing iPad Target)? Is there a good way to do it manually? If any of you have experience on this subject, help would be much appreciated Thanks, Conrad Kramer

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  • Automatically Loading XIB for UITableViewController

    - by ACBurk
    Ran into something interesting, want to know if I'm doing something wrong or if this is the correct behavior. I have a custom UITableViewController. I ASSUMED (first mistake) that if you initialize as such: [[CustomTableController alloc] init]; it would automatically load from a XIB of the same name, CustomTableController.xib, if it is in the same directory and such. HOWEVER This does not work; doesn't load the XIB. BUT, if I change the parent class of my controller from 'UITableViewController' to 'UIViewController', EVERYHTING WORKS FINE! Calling: [[CustomTableController alloc] init]; loads the controller and view from my xib. Am I doing something wrong? Is this a bug? Expected behavior?

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  • Core Data - Breaking A Relationship

    - by Garry
    Hi, I have a Patient entity and a List entity. A Patient can belong to several different lists and a list can have several different patients. Say I have a patient who belongs to 3 lists (A, B, C). I want to remove the patient from lists A & B. I do not want to delete lists A & B themselves though obviously. How do I go about doing this?

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  • How to set that compiler flag?

    - by mystify
    Shark told me this: This instruction is the start of a loop that is not aligned to a 16-byte address boundary. For optimal performance, you should align the start of a hot loop using a compiler directive. With gcc 3.3 or later, use the -falign-loops=16 compiler flag. for (int i=0; i < 4; i++) { // line with the info //...code } How would I set that flag, and does it really improve performance?

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  • Core data, sorting one-to-many child objects

    - by Shizam
    So if I have a store of parents children and the parent has a one to many relationship to children (parent.children) and they all have first names. Now, on the initial fetch for parents I can specify a sort descriptor to get them back in order of first name but how can I request the children in order? If I do a [parent.children allObjects] it just gives them back in a jumble and I'd have to sort after the fact, every time. Thanks, Sam

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  • Where is the iPhone's Date & Time getting it's time zone list

    - by johnbdh
    I can get a list of time zones with [NSTimeZone knownTimeZoneNames], but that only gives the time zone IDs which include one or 2 cities in each time zone. The Date & Time settings has a great list of cities and I have seen a few other apps that have the same if not similar lookup lists. Where do these lists come from?? I do need to relate a picked city to it's time zone like Date & Time does. Thanks, John

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  • Display CFUserNotificationDisplayAlert on iPhone Lock Screen

    - by raziiq
    I m creating an app that has to display CFUserNotificationDisplayAlert even if iPhone Screen is Locked, currently i am using this code CFOptionFlags responseFlags = 0; CFUserNotificationDisplayAlert(20.0, 3, NULL, NULL, NULL, CFSTR("Hello"), CFSTR("Hello World"), CFSTR("OK"), NULL, NULL, &responseFlags); This works great on Home Screen but doesnt pop up if the screen is locked. Is there anything else i have to add to it to make it appear on the Lock Screen as well?

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  • iPad: Detecting External Keyboard

    - by StuartW
    My app uses a UIAccessoryView to provide additional keyboard functionality (such as forward/backward tabs and arrows keys) for the virtual keyboard, but that causes UIKeyboardDidShowNotification to fire even when a physical keyboard is present (the accessory appears at the bottom of the screen). I'd like to check if a physical keyboard is attached when handling UIKeyboardWillShowNotification, to prevent the accessory view from appearing and to prevent my custom view from scrolling up (to make room for the non-existent virtual keyboard). I've tried examining the UIKeyboardFrameEndUserInfoKey key, but it returns a real size for the virtual keyboard, in spite of nothing being displayed. Is there any way to detect the presence of a physical keyboard to prevent this unwanted behaviour? Hmm, the plot thickens. I tried disabling the input accessory by returning nil from the inputAccessoryView property of the Responder object which triggers the keyboard. That suppresses UIKeyboardWillShowNotification and UIKeyboardDidShowNotification when there is a physical keyboard present, but keeps these notifications when there is no such keyboard. All good so far. Then I tried re-enabling inputAccessoryView only after UIKeyboardWillShowNotification had been received. This only fires when a virtual keyboard is needed, so it should allow me to reintroduce the accessory view in those circumstances. Or so I thought. Unfortunately, it seems the OS doesn't check inputAccessoryView after UIKeyboardWillShowNotification, so it fails to show the accessory view when it is needed :o( That leaves me with two options: Include the input accessory view, giving extra functionality for virtual keyboard users, but lose the ability to detect a physical keyboard and hence not supporting physical devices; or Exclude the input accessory altogether, preventing most users from accessing the extra keys, but allowing the app to work with a physical keyboard. Not a great choice, so I'm still keen to see if anyone else has addressed this problem!

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  • cocoa hello world screensaver

    - by RW
    I have been studying NSView and as such I thought I would give a shot at a screen saver. I have been able to display and image in an NSView but I can't seen to modify this example code to display a simple picture in ScreenSaverView. http://www.mactech.com/articles/mactech/Vol.20/20.06/ScreenSaversInCocoa/ BTW great tutorial that works with Snow Leopard. I would think to simply display an image I would need something that looked like this... What am I doing wrong? // // try_screensaverView.m // try screensaver // #import "try_screensaverView.h" @implementation try_screensaverView - (id)initWithFrame:(NSRect)frame isPreview:(BOOL)isPreview { self = [super initWithFrame:frame isPreview:isPreview]; if (self) { [self setAnimationTimeInterval:1]; //refresh once per sec } return self; } - (void)startAnimation { [super startAnimation]; NSString *path = [[NSBundle mainBundle] pathForResource:@"leaf" ofType:@"JPG" inDirectory:@""]; image = [[NSImage alloc] initWithContentsOfFile:path]; } - (void)stopAnimation { [super stopAnimation]; } - (void)drawRect:(NSRect)rect { [super drawRect:rect]; } - (void)animateOneFrame { ////////////////////////////////////////////////////////// //load image and display This does not scale the image NSRect bounds = [self bounds]; NSSize newSize; newSize.width = bounds.size.width; newSize.height = bounds.size.height; [image setSize:newSize]; NSRect imageRect; imageRect.origin = NSZeroPoint; imageRect.size = [image size]; NSRect drawingRect = imageRect; [image drawInRect:drawingRect fromRect:imageRect operation:NSCompositeSourceOver fraction:1]; } - (BOOL)hasConfigureSheet { return NO; } - (NSWindow*)configureSheet { return nil; } @end

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  • best practice to obtain time zone for iPhone vs iPod Touch

    - by johnbdh
    I am creating an app that requires the users current time zone. If the device being used is an iPhone and the user has their Time Zone set to automatically change, I think I can be fairly confident that localTimeZone or systemTimezone will give me the correct time zone for the user's location. If on the other hand the device is an iPod Touch, the time zone returned by localTimeZone and systemTimeZone appears to always be whatever time zone is set in the Date & Time settings, regardless of the user's actual location. I tried using location services but, while the lat/long is being provided properly, the time zone offset in the timesStamp I am getting is always the same as whatever the user has set for their time zone setting. Any suggestions? John

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  • Pre-crash iphone symptoms - odd user position, volume change

    - by BankStrong
    I'm seeing intermittent strange symtoms in my app: Blue blob (user position in MKMapView) starts "exploding" (odd, jerky animation). Can begin at startup and seems to indicate eventual problems. Speaker volume suddenly increases (back to level before I invoked kAudioSessionSetProperty_OtherMixableAudioShouldDuck). The app keeps running, but this change tells me to expect no more sounds from AVAudioPlayer. Also a reliable indicator of a future crash (on save, etc). I'm having trouble provoking this in the debugger (seems to only happen with movement in GPS). Any ideas to track it down?

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  • How to tell if you touched a CCLabel? (Cocos2d Question)

    - by RexOnRoids
    How to tell if you touched a CCLabel? The following code obviously does not work well enough because it only tests for point equality. Naturally touch point will not necessarily be equal to the position property of the CCLabel (CCNode). How to I tell if a Touch point has fallen within the "rectangle?" of the CCLabel? - (void)ccTouchesEnded:(NSSet *)touches withEvent:(UIEvent *)event { for( UITouch *touch in touches ) { CGPoint location = [touch locationInView: [touch view]]; location = [[CCDirector sharedDirector] convertToGL:location]; self.myGraphManager.isSliding = NO; if(CGPointEqualToPoint(location, label1.position)){ NSLog(@"Label 1 Touched"); }else if(CGPointEqualToPoint(location, label2.position)){ NSLog(@"Label 2 Touched"); }else if(CGPointEqualToPoint(location, label3.position)){ NSLog(@"Label 3 Touched"); }else if(CGPointEqualToPoint(location, label4.position)){ NSLog(@"Label 4 Touched"); }else if(CGPointEqualToPoint(location, label5.position)){ NSLog(@"Label 5 Touched"); }else if(CGPointEqualToPoint(location, label6.position)){ NSLog(@"Label 6 Touched"); } NSLog(@"Touch Made!"); } }

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  • iPhone/iPad : Check for invalid characters in a textbox made for Integers only

    - by JustinXXVII
    I noticed that the iPhone OS is pretty good about picking out Integer values when asked to. Specifically, if you use NSString *stringName = @"6("; int number = [stringName intValue]; the iPhone OS will pick out the 6 and turn the variable number into 6. However, in more complex mistypes, this also makes the int variable 6: NSString *stringName = @"6(5"; int number = [stringName intValue]; The iPhone OS misses the other digit, when what could have possibly been the user trying to enter the number 65, the OS only gets the number 6 out of it. I need a solution to check a string for invalid characters and return NO if there is anything other than an unsigned integer in a textbox. This is for iPad, and currently there is no numeric keyboard like the iPhone has, and I'm instead limited to the standard 123 keyboard. I was thinking that I need to use NSRange and somehow loop through the entire string in the textbox, and checking to see if the current character in the iteration is a number. I'm lost as far as that goes. I can think of testing it against zero, but zero is a valid integer. Can anyone help?

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  • Using the Apple Scripting bridge with Mail to send an attachment causes the message background to go

    - by Naym
    Hello, When I use the Apple Scripting Bridge to send a message with an attachment the background of the message is set to black which is a problem because the text is also black. The code in question is: MailApplication *mail = [SBApplication applicationWithBundleIdentifier:@"com.apple.Mail"]; /* create a new outgoing message object */ MailOutgoingMessage *emailMessage = [[[mail classForScriptingClass:@"outgoing message"] alloc] initWithProperties: [NSDictionary dictionaryWithObjectsAndKeys: emailSubject, @"subject", [self composeEmailBody], @"content", nil]]; /* add the object to the mail app */ [[mail outgoingMessages] addObject: emailMessage]; /* set the sender, show the message */ emailMessage.sender = [NSString stringWithFormat:@"%@ <%@>",[[[mail accounts] objectAtIndex:playerOptions.mailAccount] fullName],[[[[mail accounts] objectAtIndex:playerOptions.mailAccount] emailAddresses] objectAtIndex:0]]; emailMessage.visible = YES; /* create a new recipient and add it to the recipients list */ MailToRecipient *theRecipient = [[[mail classForScriptingClass:@"to recipient"] alloc] initWithProperties: [NSDictionary dictionaryWithObjectsAndKeys: opponentEmail, @"address", nil]]; [emailMessage.toRecipients addObject: theRecipient]; /* add an attachment, if one was specified */ if ( [playerInfo.gameFile length] > 0 ) { /* create an attachment object */ MailAttachment *theAttachment = [[[mail classForScriptingClass:@"attachment"] alloc] initWithProperties: [NSDictionary dictionaryWithObjectsAndKeys: playerInfo.gameFile, @"fileName", nil]]; /* add it to the list of attachments */ [[emailMessage.content attachments] addObject: theAttachment]; } /* send the message */ [emailMessage send]; The actual change to the background colour occurs on the second last line, which is: [[emailMessage.content attachments] addObject: theAttachment]; The code sections above are essentially lifted from the SBSendMail example code from Apple. At this stage I've really only made the changes necessary to integrate with the data from my application. If I build and run the SBSendMail example after freshly downloading it from Apple the message background is also changed to black with execution of the same line. It does not appear to matter which type of file is attached, where it is located, or on which computer or operating system is used. This could be a bug in Apple's scripting bridge but has anyone come across this problem and found a solution? ALternatively does anyone know if the background colour of a MailOutgoingMessage instance can be changed with the scripting bridge? Thanks for any assistance with this, Naym.

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  • Static library woes in iPhone 3.x with categories and C libraries

    - by hgpc
    I have a static library (let's call it S) that uses a category (NSData+Base64 from MGTwitterEngine) and a C library (MiniZip wrapped by ZipArchive). This static library is used in an iPhone 3.x project (let's call it A). To be able to use the MiniZip library I included its files in project A as well as the static library S. If not I get compilation errors. Project A works fine on the simulator. When I run it on the device, I get unrecognized selector errors when the category is used. As pointed out here, it seems there's a linker bug that affects categories in iPhone 3.x (http://stackoverflow.com/questions/1147676/categories-in-static-library-for-iphone-device-3-0). The workaround is to add -all_load to the Other Linker Flags of the project that references the static library. However, if I do this then I get duplicate symbol errors because I included the MiniZip libraries in project A. A workaround is to include the category files in project A as well. If I do this, project A works well in the device, but fails to build on the simulator because of duplicate symbol errors. How should I set up project A to make it work on the simulator and the device with the same configuration?

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  • TableView - iVar reset when returning from details view

    - by iFloh
    Hi, anyone knows what I need to do to retain my TableView iVars whilst pushing a details view onto the navigation stack? I have an array and a date defined as iVars and the array is retained, whilst the date is not. I checked whether there may be an autorelease hidden somewhere but there are no obvious ones. The properties are defined as nonatomic, retain. I use custom NSDate category methods to determine specific dates at stages. These use NSDateComponents, NSRange and NSCalendar, for example: - (NSDate *)lastDayOfMonth: { NSCalendar *tmpCal = [NSCalendar currentCalendar]; NSDateComponents *tmpDateComponents = [tmpCal components:NSYearCalendarUnit | NSMonthCalendarUnit | NSEraCalendarUnit | NSWeekCalendarUnit | NSWeekdayOrdinalCalendarUnit fromDate:self]; NSRange tmpRange = [tmpCal rangeOfUnit:NSDayCalendarUnit inUnit:NSMonthCalendarUnit forDate:[tmpCal dateFromComponents:tmpDateComponents]]; [tmpDateComponents setDay:tmpRange.length]; [tmpDateComponents setHour:23]; [tmpDateComponents setMinute:59]; [tmpDateComponents setSecond:59]; return [[NSCalendar currentCalendar] dateFromComponents:tmpDateComponents]; } could they somehow be the reason?

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