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• Mapkit: Only show annotations in current view

  - by Nic Hubbard

  Instead of loading all annotations that are in my array, I would only like to load the annotations that the user could currently see cased on how far they are zoomed in on the map. So, if the user pans to a place where there are annotations, those would be added, and if they pan away, those would be removed. I assume this would help with memory. Does anyone know how to do something like this? And, is it worth it, or needed?

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• How do I create a UISplitView manually?

  - by Mark

  I have an app that is going to navigate to a UISplitView (inside another view altogether) like so: - (void) switchToMyDayView { NSLog(@"Show My Day Screen"); if (self.myDayController.view.superview == nil) { if (self.myDayController == nil) { MyDayController *myController = [[MyDayController alloc] initWithNibName:@"MyDay" bundle:nil]; self.myDayController = myController; [myController release]; } [homeScreenController.view removeFromSuperview]; [self.view insertSubview:self.myDayController.view atIndex:0]; } } Which is done on the main navigation screen Now, the MyDayController has a XIB called MyDay.xib which has these items: File's Owner: MyDayController First Responder: UIResponder Split View Controller ---->Navigation Controller ---->Navigation Bar ----> Table View Controller ----> Navigation Item ---->View Controller So, I need some more components here, I need a UITableViewController and a UISplitViewControllerDelegate correct? I was going to just implement these protocols in my MyDayController, is this sort of standard? So, after the code above, I get an error: -[UIViewController _loadViewFromNibNamed:bundle:] loaded the "MyDay" nib but the view outlet was not set. so, how can I fix it using the UISplitViewController? I know that the UISplitViewController has a view property, but I cannot use it/connect it up in IB can I? Thanks a lot Mark

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• View controller is drawing under my navigation bar after popping ttthumbsviewcontroller

  - by scootklein

  I'm implementing the TTThumbsViewController from the Three20 project and things are finally starting to take shape. I push the TTThumbsViewController from the current view controller by just pushing it onto the current stack and animate the transition (common navigation controller push). My problem is that when I pop the TThumbsViewController view controller, the navigation controller is stuck in a mode where its view controllers are drawn UNDER the navigation bar (which is now translucent). Start Push Pop

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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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• UIRotationGestureRecognizer minimum rotation value

  - by dc

  Is it possible to set a minimum rotation value necessary for a UIRotationGestureRecognizer to transition into UIGestureRecognizerStateRecognized? I'm using multiple recognizers, and my UIRotationGestureRecognizer keeps getting called with a very small rotation (Between 1 and 15 degrees either direction) rather than my UIPinchGestureRecognizer. What I'd like to do is only have the rotation be called if the rotation is within a certain range, otherwise cancel it and let the pinch be called.

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• NSDefaults storage iphone?

  - by harekam_taj

  Hey Guys, Where is NSDefaults stored on iphone? Is it a good practice to store UserName and password in NSDefaults? Thanks

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• UISearchDisplayController not working when created in code??

  - by Nick Bedford

  I'm working on a tab bar application and one of the tabs has a UISearchDisplayController hooked up to a UISearchBar. It's all connected up in the NIB and is working. When I tap the search bar, the Scope and Cancel buttons fly in etc, and the search delegate updates the results table correctly. However, I'm trying to implement the same code in the viewDidLoad message instead of the NIB, however when I delete the search display controller from the NIB and uncomment my code to create the same controller in the function, it doesn't work. It's as if there's some fundamental connection not being made so that all my search delegate functionality isn't being called. Here's my working NIB version of the Search Display Controller. It's hooked up to the search bar, the UINavigationController subclass (MASearchController) and the root view of that is hooked up as the searchContentsController. Now this is what you would expect to do in code to create the same, right? What I'm doing is leaving the UISearchBar in the NIB to eliminate one piece of the puzzle at a time in code. // [MASearchController viewDidLoad] UISearchDisplayController *searchController = [[[UISearchDisplayController alloc] initWithSearchBar:searchBar contentsController:[[self viewControllers] objectAtIndex:0]] autorelease]; [searchController setDelegate:self]; [searchController setSearchResultsDelegate:self]; [searchController setSearchResultsDataSource:self]; I've checked all objects at run time and they all check out. Essentially I've deleted the search display controller from the NIB and then put in the code to create it in the viewDidLoad message. Why would this not work? The search keyboard comes up but none of my search and button animation functionality work???

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• Stop Progressbar manual scrolling in Android

  - by Rony

  Hi experts, I have already posted my query here, but unfortunately, not getting the required support for this simple query. http://www.anddev.org/prevent_manual_moving_of_seekbar_widget-t13048.html I am using progressbar widget in my application to show the download progress. In the current state, I am able to manually move the slider back and forth while download is progressing. How can I prevent the manual moving of progressbar, instead it works only based on progressbar.setProgress(progressbar.getProgress() + 1024); -- currently this works perfect, but I need to prevent the manual moving of progressbar during download. Any help in this regard is appreciated. Regards, Rony

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• Converting NSMutableData to NSString Problem

  - by Sheehan Alam

  initWithData does not convert my data object into a string properly. When I check the length of the data object, it has a value. NSMutableData* receivedData =[[NSMutableData data] retain]; NSString* json_string = [[NSString alloc] initWithData:receivedData encoding:NSUTF8StringEncoding]; Am I doing something wrong creating the string?

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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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• MFMailComposeViewController problem on the ipad

  - by Momeks

  hi , iam using MFMailCompose for my application every thing works fine but iam using this code for the iPad and on the end of the mail has been written Sent From My iPhone what can i do to change it to iPad ? :D

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• Initialize preferences from XML in main Activity

  - by pixel

  My problem is that when I start application and user didn't open my PreferenceActivity so when I retrieve them don't get any default values defined in my preference.xml file. preference.xml file: <?xml version="1.0" encoding="utf-8"?> <PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android" android:key="applicationPreference" android:title="@string/config" > <ListPreference android:key="pref1" android:defaultValue="default" android:title="Title" android:summary="Summary" android:entries="@array/entry_names" android:entryValues="@array/entry_values" android:dialogTitle="@string/dialog_title" /> </PreferenceScreen> Snippet from my main Activity (onCreate method): SharedPreferences appPreferences = PreferenceManager.getDefaultSharedPreferences(this); String pref1 = appPreferences.getString("pref1", null); In result I end up with a null value.

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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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• how to download update from iphone app to replace old sqlite database

  - by user301212

  hi i use sqlite database on my iphone app and i need to update this database from the internet from my server how i can download the new database and delete the old database and recopy the new database to document directory

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• Xcode: iPhone app codesign error

  - by Gabe Hollombe

  When building a new iPhone app in Xcode, I'm getting this error: codesign error: code signing identity 'iphone developer' does not match any code-signing certificate in your keychain. once added to the keychain, touch a file or clean the project to continue. What's the fix?

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• Great UIKit/Objective-C code snippets

  - by Nissan Fan

  New to Objective-C iPhone/iPod touch/iPad development, but I'm starting to discover lots of power in one-liners of code such as this: [UIApplication sharedApplication].applicationIconBadgeNumber = 10; Which will display that distinctive red notification badge on your app iphone with the number 10. Please share you favorite one or two-liners in Objective-C for the iPhone/iPod touch/iPad here. PUBLIC APIs ONLY.

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• What is the format of iPad magazine file created by InDesign

  - by AJ

  Does anyone know what is the format of the digital magazine content created by InDesign? And how we can render it in iPad? The digital content for the famous Time iPad mag is created using InDesign. Any information or head start here is well appriciated. Thanks AJ

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• Dragging a Sprite (Cocos2D) while Chipmunk is simulating

  - by itai alter

  Hello all! I have a simple project built with Cocos2D and Chipmunk. So far it's just a Ball (body, shape & sprite) bouncing on the Ground (a static line segment at the bottom of the screen). I implemented the ccTouchesBegan/Moved/Ended methods to drag the ball around. I've tried both: cpBodySlew(ballBody, touchPoint, 1.0/60.0f); and ballBody->p = cgPointMake(touchPoint.x,touchPoint.y); and while the Ball does follow my dragging, it's still being affected by gravity and it tries to go down (which causes velocity problems and others). Does anyone know of the preferred way to Drag an active Body while the physics simulation is going on? Do I need somehow to stop the simulation and turn it back on afterwards? Thanks!

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• Differentiating Between UITouch Objects On The iPhone

  - by Jasarien

  Hey guys, I'm trying to differentiate between two (or more) UITouch objects on the iPhone. Specifically, I'd like to know the order in which the touches occurred. For instance, in my -touchesBegan:withEvent: method I get an NSSet of UITouch objects. Now I can find out how many touches there are, but, which object represents which finger? I notice the timestamp property on UITouch - is this what I'm looking for? I see how that would be useful to obtaining the last or first touch - providing the touches don't mutate... Therein lies my problem. I can use the timestamp to single out the latest touch, but then the touch that occurred first moves, and IT becomes the latest touch... At the end of this exercise, I'd like to be able to implement the "pinch" gesture to zoom in or out, etc. Any help would be greatly appreciated, thanks.

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• pass value through url

  - by shishir.bobby

  hi all, i hv a question. my url is some thing like this http://www.google.com?to=shishir&from=friend and i hv 2 textfeild from where i m getting value of to and from. i need to set those values of 2 textfeiilds into the URL to="values from textfeild" from="value from textfeild" to create a somewhat called a dynamic URL. how can i do it quick reply is always appreciated regards shishir

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• TTNavigator three20 openURLAction

  - by disp

  I'm new to three20 and trying to find my way through the TTNavigator class. I try to push to a new view via the URL system. So I used openURL: animated: method which works just fine, but it's deprecated, and I know that I should use openURLAction instead, but this has no animated: parameter. Am I missing something?

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• iPhone: Utility Application - Open Flipside on startup

  - by Joel

  I have an application that I started with the Utility Application template. I'm using the Flipside for the Settings screen. I'm having the settings serialized to a file when the app is closed and deserialized when the app is opened. If there is no file to deserialize at startup, I want the flipside to be shown so the user can enter required information. This is what I have: - (void)viewDidLoad { flipController = [[FlipsideViewController alloc] initWithNibName:@"FlipsideView" bundle:nil]; flipController.delegate = self; flipController.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal; if(![self deserialize]) { [self showInfo]; } } - (IBAction)showInfo { [self presentModalViewController:flipController animated:YES]; } showInfo is the method that is called with the little 'i' button is pressed on the MainView. The button works, however my call in viewDidLoad doesn't. I have run through my code with the debugger. [self deserialize] is returning NO and [self showInfo] is being called, and I checked if flipController is nil in that context, and it's not. I've searched around and couldn't find anyone who's tried to do the same thing. I'm stumped to as why this isn't working. Anyone see what I'm doing wrong? Thanks

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• is there a default back key(on device) listener in android???

  - by androidbase Praveen

  hi all, i am having two activities A and B. when i click the button in A that will shows B. when i click the Button in B it backs to A. i had set the overridePendingTransition method after the finish() method. it works properly. but in case the current Activity is B. on that time i click the default back button in the device. it shows the right to left transition to show the Activity A. how i can listen that Default back key on device.?????

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• Navigation bar's buttons tint color sometimes not set

  - by Felipe

  Refer to the following, short video: http://screencast.com/t/cmnsqVTh The problem is with the color of a navigation bar's back button. The first time I load the app, the navigation bar + its buttons have the default color. I then push a view controller on the stack, and when the new view loads (in the viewDidLoad method), it sets the navigation bar's tint color to pink. The nav bar's buttons are also pink as expected. I then press the back button, and the view is popped from the stack. On the root view controller's viewWillAppear method I set the tint color back to nil so that it's the default color again. The navigation bar looks as expected. However if I push the view controller on the stack yet again, the navigation bar's tint color is pink, but the back button's color is the default light blue. Hope that was understandable. So what's the cause of the problem?

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• How to troubleshoot deallocation of object in uitableview?

  - by 4thSpace

  I have a table view with tall cells. About 300 in height. The cells are custom and have an associated nib. In cellForRowAtIndexPath, I access an object in an array using indexPath.row. The object has properties, which I assign to labels on the custom cell. This works fine for the first two cells. Once I scroll enough for the third cell to get created, the app crashes. I have NSZombieEnabled set and here is the output: 2010-04-19 21:48:13.360 MyApp[54463:207] *** -[CALayer release]: message sent to deallocated instance 0xfc4e50 (gdb) continue 2010-04-19 21:48:18.382 MyApp[54463:207] *** NSInvocation: warning: object 0xfc4e50 of class '_NSZombie_CALayer' does not implement methodSignatureForSelector: -- trouble ahead 2010-04-19 21:48:18.383 MyApp[54463:207] *** NSInvocation: warning: object 0xfc4e50 of class '_NSZombie_CALayer' does not implement doesNotRecognizeSelector: -- abort (gdb) continue Program received signal: “EXC_BAD_ACCESS”. (gdb) I'm not sure what is deallocated. How can I trace this to the source?

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