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  • Best practice to display POI in iPhone's MapKit?

    - by iamj4de
    Assuming I have a database of POI with their respective coordinates (longitude & latitude). What would be the "standard" way to display the POI as annotations around the user's current location? To elaborate: Given a zoom level, I guess I have to search through the database for all POI whose distance to the current location < a certain threshold, then create annotations for them. Or is there any smarter way? If the user zooms in/out, moves the map... I will need to redo the whole thing again? It seems that MapKit has a mechanism to cache/reuse annotations. Should I create a lot of them right away and let MapKit decides what to render when the visible region changes? I guess this would make the transition smoother, but also consumes more memory. What is your experience with this? Thanks.

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  • Core Data iPhone how often should I call [managedObjectContext save:&error] when doing 50k record in

    - by jamone
    I will be doing an occiasional import from XML into core data. I have around 50k entities that will be added. My question is how often should I call [managedObjectContext save:&error]. For every new entity added, or every x entities, or just at the end of the 50k import? I currently am calling it for each entity and tried only doing it for around every 10k and import speed went up drastically but after the first 30k it would crash with: *** Terminating app due to uncaught exception 'NSGenericException', reason: '*** Collection <NSCFSet: 0x13e760> was mutated while being enumerated.' Before I spend too much time trying to diagnose what is going on there I figured I'd check if its ok to not call save on every entity? Is the # of entities before calling save limited by the amount of memory those entities are using?

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  • glTexImage2D behavior on iPhone and other OpenGL ES platforms

    - by spurserh
    Hello, I am doing some work which involves drawing video frames in real time in OpenGL ES. Right now I am using glTexImage2D to transfer the data, in the absence of Pixel Buffer Objects and the like. I suspect that the use of glTexImage2D with one or two frames of look-ahead, that is, using several textures so that the glTexImage2D call can be initiated a frame or two ahead, will allow for sufficient parallelism to play in real time if the system is capable of it at all. Is my assumption true that the driver will handle the actual data transfer to the hardware asynchronously after glTexImage2D returns, assuming I don't try to use the texture or call glFinish/glFlush? Is there a better way to do this with OpenGL ES? Thank you very much, Sean

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  • UItextfield text alignment issue in cocos2D iPhone

    - by shreya
    Hi All, Please take a look of the following screen shot. Here is my code, I am using cocos2D CGAffineTransform transform = CGAffineTransformMakeRotation(3.14159/2); _view = [[CCDirector sharedDirector]openGLView]; // Input the user name _nameField = [[UITextField alloc]initWithFrame:CGRectMake(130.0, 270.0, 200.0, 30.0)]; _nameField.transform = transform; _nameField.adjustsFontSizeToFitWidth = YES; _nameField.textColor = [UIColor blackColor]; [_nameField setFont:[UIFont fontWithName:@"Arial" size:14]]; _nameField.placeholder = @"<Enter Your Name>"; _nameField.backgroundColor = [UIColor clearColor]; _nameField.autocorrectionType = UITextAutocorrectionTypeNo; _nameField.autocapitalizationType = UITextAutocapitalizationTypeAllCharacters; _nameField.textAlignment = UITextAlignmentCenter; _nameField.keyboardType = UIKeyboardTypeDefault; _nameField.returnKeyType = UIReturnKeyDone; _nameField.tag = 0; _nameField.delegate = self; _nameField.clearButtonMode = UITextFieldViewModeNever; _nameField.borderStyle = UITextBorderStyleRoundedRect; [_view addSubview:_nameField]; The problem is the text is typing on the top of the text field. I want it to be in the middle not to top.

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  • iPhone Problem comparing course value for cllocation

    - by zebra
    hi all, i'm writing some code for getting some values including course -(void) locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation { //somecode NSString *dirString = [[NSString alloc] initWithFormat:@"%d", newLocation.course]; int myInt = [dirString intValue]; if ((myInt >= 0) || (myint < 90)) {course.text =@ "N";} if ((myInt >= 90) || (myint < 180)) {course.text =@ "E";} and so on, but i always retrieve the first value, "N". where's my mistake? Thank's!

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  • iPhone Settings app and keyboard control?

    - by randallmeadows
    So I'm putting my app's preference settings into the Settings app. One of the settings is an edit text field (PSTextFieldSpecifier). When touched, the keyboard dutifully appears, I can make the edits, but when I press Return....nothing. Well, the editing is completed, but the keyboard remains. I see no way to make the keyboard go away. I also notice this same behavior in other Settings panes, including those from Apple. Do I assume correctly that this is just standard behavior and I need to just accept the fact that my Settings table has now been reduced to half size, and just deal? Furthermore, I gather there is no approved way to have a "rich" child pane display, such as that seen in Settings-General-About-Legal? Or a way to do what appears to be a -presentModalViewController, a la Settings-General-Passcode Lock?

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  • Problem in Autoresizing subviews in iPhone programmatically

    - by Cathy
    Hi, I have created a UIViewController and a UIView with two UIButtons in it. self.view = [[UIView alloc]initWithFrame:CGRectMake( 0,0,320,480)]; self.view.autoresizesSubviews = YES; self.view.backgroundColor = [UIColor redColor]; UIView *view; view = [[UIVew alloc]initWithFrame:CGRectMake(0,0,320,480)]; view.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight; UIButton *button1; button.frame = CGRectMake(100,130,120,50); [button addTarget:self action:@selector(buttonAction:) forControlEvents:UIControlEventTouchUpInside]; [view addSubview:button]; [controller addSubview:view]; -(void)buttonAction:(id)sender { //I have created another view for a purpose [view removeFromSuperview]; UIView *view_obj; **view_obj.backgroundColor = [UIColor greenColor];** view_obj.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleWidth; [self.view addSubview:view_obj]; } Problem: When I change the orientation into landscape the view which has the button is resized but when i click on the button the view with the blueColor is displayed without autoresized. Where i can see half as root view in redColor and half as the subview in greenColor.I have also overrided the ShouldAutoRotate method and done this project programmatically. Please do reply me.

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  • NSString problem on iphone while displaying on UILabel

    - by prajakta
    i have a issue , i am asking as new question as previoes one was messed NSString *s=@"hi\nhello\n\nwelcome to this world\ni m jhon" label.frame = ...//big enough height label.numberOfLines = 0; label.text = s; this code helps me to separate string based on \n but if i do this NSString *s=Ad.content //where Ad.content value is **hi\nhello\n\nwelcome to this world\ni m jhon** label.numberOfLines = 0; label.text = s; i am not able to sperate them by \n , what i am doing wrong here kindly suggest Thanks

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  • iPhone - Dismiss modal view by a UITabBarController

    - by ncohen
    Hi everyone, I've got into a very strange problem. I created my own UITabBarController to customize it and it works pretty well... except for the modal views. When I dismiss the modal view (present/dismiss from the UITabBarController) with an animation, it waits until the animation did finished and goes to the first controller of the tab bar! Why does the controller change? and how can I fix it? Thanks PS: My UITabBarController view is on the main window and has a UITabBar on it. The controllers (which are managed by the tab bar) are on the main window over the tab bar controller view with a shorter height. When I present the modal view, I bring the tab bar controller view to front.

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  • Iphone SDK: pathFoResource:Nsstring problem -> playin MP3 files

    - by Kaya
    I am trying to get 10 mp3 files in the resources folder and play them when a button is pressed. I have entered name of the mp3 files in a NSMutableArray and read each one after the button is pressed. The problem is that pathForResource: is not working (returns nil). If i use the file name explicitly -like pathFoResource:@"song1.mp3" ofType:@"mp3"- but if i use pathForResource:valuem whwre valuem is an NSstring with value of song1 Hope you can help Regards NSString *cellValue0 = [listOfmp3 objectAtIndex:anumber]; NSString *valuem; if ( [cellValue0 length] 0 ) valuem = [cellValue0 substringToIndex:[cellValue0 length] - 4]; NSString *pdfPath2 = [[NSBundle mainBundle] pathForResource:valuem ofType:@"mp3"]; NSURL *url = [NSURL fileURLWithPath:pdfPath2];

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  • remote database connection with my iphone application using cocos2d

    - by Rana
    MCPResult *theResult; MCPConnection *mySQLConnection; //initialize connection string vars NSString *dbURL = @"192.168.0.16"; NSString *userName = @""; NSString *pass = @""; int port = 3306; //open connection to database mySQLConnection = [[MCPConnection alloc] initToHost: dbURL withLogin:userName password:pass usingPort:port]; if ([mySQLConnection isConnected]) { NSLog(@"The connection to database was successfull"); } else { NSLog(@"The connection to database was failed"); } //selection to database if([mySQLConnection selectDB:@"blackjack_DB"]) { NSLog(@"Database found"); } else { NSLog(@"Database not found"); } //selection to Table theResult = [mySQLConnection queryString:@"select * from test"]; //theResult = [mySQLConnection queryString:@"select * from test where id='1'"]; //theResult = [mySQLConnection queryString:@"select id from test"]; //theResult = [mySQLConnection queryString:@"select name from test where pass='main_pass'"]; NSArray *m= [theResult fetchRowAsArray]; NSLog(@"%@", m); NSLog(@"%@", [m objectAtIndex:2]); Use this code for connecting & receive information from remotedatabase. And also use some framework. AppKit.framework, Cocoa.framework, Carbon.framework, MCPKit_bundled.framework. But stile i didn't connect my application with remort database.

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  • Objective C / iPhone comparing 2 CLLocations /GPS coordinates

    - by user289503
    have an app that finds your GPS location successfully, but I need to be able to compare that GPS with a list of GPS locations, if both are the same , then you get a bonus. I thought I had it working, but it seems not. I have 'newLocation' as the location where you are, I think the problem is that I need to be able to seperate the long and lat data of newLocation. So far ive tried this: Code: NSString *latitudeVar = [[NSString alloc] initWithFormat:@"%g°", newLocation.coordinate.latitude]; NSString *longitudeVar = [[NSString alloc] initWithFormat:@"%g°", newLocation.coordinate.longitude]; An example of the list of GPS locations: Code: location:(CLLocation*)newLocation; CLLocationCoordinate2D bonusOne; bonusOne.latitude = 37.331689; bonusOne.longitude = -122.030731; and then Code: if (latitudeVar == bonusOne.latitude && longitudeVar == bonusOne.longitude) { UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"infinite loop firday" message:@"infloop" delegate:nil cancelButtonTitle:@"Stinky" otherButtonTitles:nil ]; [alert show]; [alert release]; this comes up with an error 'invalid operands to binary == have strut NSstring and CLlocationDegrees' Any thoughts?

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  • iPhone SDK - UITabBarConroller and custom design

    - by Cheryl
    Hi I am having a problem with my tab bars at the bottom of the screen. The designer has decided it should be one colour (not black) when inactive and another colour when active. I have worked out how to replace the main colour of the tabbar by subclassing UITabBarController and doing this:- - (void)viewDidLoad { [super viewDidLoad]; CGRect frame = CGRectMake(0.0, 0, self.view.bounds.size.width, self.view.bounds.size.height); UIView *v = [[UIView alloc] initWithFrame:frame]; //get percentage values from digitalcolour meter and enter as decimals v.backgroundColor = [UIColor colorWithRed:.0 green:.706 blue:.863 alpha:1]; [tabBar1 insertSubview:v atIndex:0]; [v release]; } I just can't see how to make the active tabbar be a separate colour when it is selected. I have tried subclassing UITabBarItem but there doesn't seem to be any property for me to set to change the background colour of the tab. They also want to have the icons on the tab bar not be blue and grey and I can't figure out how to do that. In the ViewController for one tab bar item I have put this into viewdidload:- myTabBarItem *tabItem = [[myTabBarItem alloc] initWithTitle:@"listOOO" image:[UIImage imageNamed:@"starcopy.png"] tag:1]; tabItem.customHighlightedImage=[UIImage imageNamed:@"starcopy.png"]; self.tabBarItem=tabItem; [tabItem release]; tabItem=nil; and in my subclass of UITabBarItem I have put this:- -(UIImage *) selectedImage{ return self.customHighlightedImage; } Only I don't see the icon at all. If I put this into the viewDidLoad of my subclass of UITabBarController:- for (UITabBarItem *item in tabBar1.items){ item.image = [UIImage imageNamed:@"starcopy.png"]; } Then all my tab bars have the icon but they are blue (and grey when inactive) how would I get them not to become blue but stay their original colour? If you have any light on this problem please help as I have been banking my head on the wall for 2 days now and it's getting me down. Thanks in advance Cheryl

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  • best-practices for displaying new view controllers ( iPhone )

    - by Tristan
    I need to display a couple of view controllers (eg, login screen, registration screen etc). What's the best way to bring each screen up? Currently for each screen that I'd like to display, I call a different method in the app delegate like this: Code: - (void) registerScreen { RegistrationViewController *reg = [[RegistrationViewController alloc] initWithNibName:@"RegistrationViewController" bundle:nil]; [window addSubview:reg.view]; } - (void) LoginScreen { LoginViewController *log = [[LoginViewController alloc] initWithNibName:@"LoginViewController" bundle:nil]; [window addSubview:log.view]; } It works, but I cant imagine it being the best way.

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  • Uploading files using HTML file input on iphone

    - by futureelite7
    I am creating a web form for uploading small movie clips to a HTTP server. However, while my HTML file input control gets shown on an ipod touch, the button is completely disabled and I cannot click it to upload files. What do I have to do to use the input control to upload files (e.g. movie clips or pictures) to my HTTP server. My page is XHTML MP 1.2 compliant.

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  • iphone tab bar controller and core data.

    - by Sway
    Ok bit of a newbie type question. I want to use Core Data, together with Tab and Navigation controllers. In XCode if I create a Navigation Based Application I get the option to choose Core Data. Whereas If I create a Tab Bar Application I don't get the choice. I understand that Tab Bars display view controllers so it kinda makes sense. However given that by default it sticks the basic Core Data code in the Application delegate I don't see why this isn't offered. At the moment I'm creating the two projects and cutting and pasting between them. Does this omission in XCode seem weird to you? Is it some sort of oversight? Thanks, Matt

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  • Iphone Receiving Errors in Organizer Console

    - by user192124
    When attempting to use the app I have developed I am receiving the following errors: Sun Oct 18 17:49:38 unknown com.apple.debugserver-43[316] <Error>: error: RNBRemote::HandlePacket_p(p3b): unknown register number 59 requested Sun Oct 18 17:49:38 unknown com.apple.debugserver-43[316] <Error>: error: RNBRemote::HandlePacket_p(p3c): unknown register number 60 requested Sun Oct 18 17:49:38 unknown com.apple.debugserver-43[316] <Error>: error: RNBRemote::HandlePacket_p(p3d): unknown register number 61 requested Sun Oct 18 17:49:38 unknown com.apple.debugserver-43[316] <Error>: error: RNBRemote::HandlePacket_p(p3e): unknown register number 62 requested Sun Oct 18 17:49:38 unknown com.apple.debugserver-43[316] <Error>: error: RNBRemote::HandlePacket_p(p3f): unknown register number 63 requested Sun Oct 18 17:49:38 unknown com.apple.debugserver-43[316] <Error>: error: RNBRemote::HandlePacket_p(p40): unknown register number 64 requested Sun Oct 18 17:49:38 unknown com.apple.debugserver-43[316] <Error>: error: RNBRemote::HandlePacket_p(p41): unknown register number 65 requested Sun Oct 18 17:49:38 unknown com.apple.debugserver-43[316] <Error>: error: RNBRemote::HandlePacket_p(p42): unknown register number 66 requested Sun Oct 18 17:49:38 unknown com.apple.debugserver-43[316] <Error>: error: RNBRemote::HandlePacket_p(p43): unknown register number 67 requested Sun Oct 18 17:49:38 unknown com.apple.debugserver-43[316] <Error>: error: RNBRemote::HandlePacket_p(p44): unknown register number 68 requested Sun Oct 18 17:49:38 unknown com.apple.debugserver-43[316] <Error>: error: RNBRemote::HandlePacket_p(p45): unknown register number 69 requested Sun Oct 18 17:49:38 unknown com.apple.debugserver-43[316] <Error>: error: RNBRemote::HandlePacket_p(p46): unknown register number 70 requested Sun Oct 18 17:49:38 unknown com.apple.debugserver-43[316] <Error>: error: RNBRemote::HandlePacket_p(p47): unknown register number 71 requested Sun Oct 18 17:49:38 unknown com.apple.debugserver-43[316] <Error>: error: RNBRemote::HandlePacket_p(p48): unknown register number 72 requested Sun Oct 18 17:49:38 unknown com.apple.debugserver-43[316] <Error>: error: RNBRemote::HandlePacket_p(p49): unknown register number 73 requested Sun Oct 18 17:49:38 unknown com.apple.debugserver-43[316] <Error>: error: RNBRemote::HandlePacket_p(p4a): unknown register number 74 requested Unfortunately I am not finding anything on google about RNBRemote or HandlePacket_p messages. Has anyone received anything like this before and what could be causing it? It crashes the app. Thank You

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  • [iPhone] Background color during flip view animation/transition?

    - by Rob S.
    I have some pretty standing flipping action going on: [UIView beginAnimations:@"swapScreens" context:nil]; [UIView setAnimationTransition:UIViewAnimationTransitionFlipFromLeft forView:self.view cache:YES]; [UIView setAnimationDuration:1.0]; [self.view exchangeSubviewAtIndex:0 withSubviewAtIndex:1]; [UIView commitAnimations]; To Apple's credit, this style of animation is amazingly easy to work with. Very cool, and I've been able to animate transitions, flips, fades etc. throughout the app very easily. Question: During the flip transition, the background visible 'behind' the two views during the flip is white and I'd like it to be black. I've: Set the background of the containing view (self.view above) - no dice. I really thought that would work. Set the background of each view to black - no dice. I didn't think this would work although you give different things a shot to understand better :) Google'd like crazy; keep landing on Safari-related listings. Thanks in advance!

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  • Detect file creation date on iPhone OS?

    - by Greg Maletic
    I was planning on writing some code whose logic was based upon testing the creation date of a particular file in my app's Documents folder. Turns out, when I call -[NSFileManager attributesOfItemAtPath:error:], NSFileCreationDate isn't one of the provided attributes. Is there no way to discover a file's creation date? Thanks.

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  • Strange problem in Action sheet when click the Cancel Button in iphone

    - by Pugal Devan
    Hi, I have used action sheet in my view. Now i have faced one strange problem. If i clicked the cancel button, it dismissal the action sheet. But i clicked the cancel button, it works only Half part of the button(upper side only). Other part i clicked it doesnt work. (Half portion of the button only works. Eg: actionsheet size 320X40. clicking works only 320X20. Other part doesnt work). I have already used action sheet in many applcations. But i donno what i m doing wrong?. Please find me the problem where it is? See my code is, I have declared also UIActionsheetDelegate in interface class. - (void)viewDidLoad { UIBarButtonItem *addButton = [[[UIBarButtonItem alloc] initWithTitle:NSLocalizedString(@"Share", @"") style:UIBarButtonItemStyleBordered target:self action:@selector(popupActionSheet)] autorelease]; self.navigationItem.rightBarButtonItem = addButton; } -(void)popupActionSheet { UIActionSheet *popupQuery = [[UIActionSheet alloc] initWithTitle:@"Share Post" delegate:self cancelButtonTitle:@"Cancel" destructiveButtonTitle:nil otherButtonTitles:@"Email",@"Facebook",@"Twitter",nil]; popupQuery.actionSheetStyle = UIActionSheetStyleDefault; [popupQuery showInView:self.view]; [popupQuery release]; } Please help me out. Thanks.

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  • Simultaneous gesture recognizers in Iphone SDK

    - by minaevs
    I need to catch two different swipping gestures using UISwipeGestureRecognizer(for example, UISwipeGestureRecognizerDirectionRight and UISwipeGestureRecognizerDirectionLeft). When I add two different recognisers with addGestureRecognizer method, only last added recognizer works. I've read that I need to implement gestureRecognizer:shouldRecognizeSimultaneouslyWithGestureRecognizer: method of UIGestureRecognizerDelegate protocol, but nothing works. Can anyone help with simple example of catching two or more same gestures? Thanks!

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