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  • Why are controls (null) in awakeFromNib?

    - by fuzzygoat
    This is a follow on from another question regarding why I could not set UIControls in awakeFromNib. The answer to that is that as you can see below the controls are nil in the awakeFromNib, although they are initialised to the correct objects by the time we get to viewDidLoad. I setup the view the same as I always do, should I be doing something different to access them here, the xib(nib) was designed and saved with the current version of Image Builder. CODE: @interface iPhone_TEST_AwakeFromNibViewController : UIViewController { UILabel *myLabel; UIImageView *myView; } @property(nonatomic, retain)IBOutlet UILabel *myLabel; @property(nonatomic, retain)IBOutlet UIImageView *myView; @end . @synthesize myLabel; @synthesize myView; -(void)awakeFromNib { NSLog(@"awakeFromNib ..."); NSLog(@"myLabel: %@", [myLabel class]); NSLog(@"myView : %@", [myView class]); //[myLabel setText:@"AWAKE"]; [super awakeFromNib]; } -(void)viewDidLoad { NSLog(@"viewDidLoad ..."); NSLog(@"myLabel: %@", [myLabel class]); NSLog(@"myView : %@", [myView class]); //[myLabel setText:@"VIEW"]; [super viewDidLoad]; } OUTPUT: awakeFromNib ... myLabel: (null) myView : (null) viewDidLoad ... myLabel: UILabel myLabel: UIImageView Much appreciated ... gary

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  • Why does Apple create it's views this way

    - by John Smith
    In the hope of fixing a bug of mine from another post i would like to know why apple writes this (for it's Elements example) UIView *localContainerView = [[UIView alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame]]; self.containerView = localContainerView; [localContainerView release]; instead of the simpler method: containerView = [[UIView alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame]]; ?

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  • should variable be retained or not? iphone-sdk

    - by psebos
    Hi, in the following piece of code I got from a book. The NSString *pPath which is defined in the class as an instance variable. @interface MainViewController : UIViewController { NSString *pPath; } In the implementation after being set it is being retained. I assume that with the assignment the object is automatically retained (because it is an NSString) and there is no need to additionally retain it. - (void) initPrefsFilePath { NSString *documentsDirectory = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"]; pPath = [documentsDirectory stringByAppendingPathComponent: @"flippingprefs.plist"]; [pPath retain]; }

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  • get data from online once and then viewable offline

    - by user313100
    Okay, I want to have an app that takes phone numbers from an online database and displays them in a table view. When the user is not online, I want them to still be able to see the numbers they already got from the database in the table view. If the user manages to go back online, the database updates the view. My question is, is this possible to do and if so, what's the best way to approach it? (bit of a newbie, please help me out)

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  • How to deal with multiple Facebook requests simultaneously

    - by Peter Warbo
    I'm using the Facebook SDK for my app. I have created a singleton class FacebookHelper to deal with all Facebook related logic. Whenever I make a Facebook request (i.e download friends) I set an enum i.e FacebookRequestDownloadFriends so that FacebookHelper knows how to handle errors and success for that request (since handling can be different between the different requests) This solution has worked out fine until now, because now I'm doing 2 Facebook Requests at the same time so when I set the enum for the first request i.e FacebookRequestDownloadFriends and then it will be overwritten just shortly with another request FacebookRequestDownloadEvents, so there will be confusion obviously. How can I deal with this issue without having to refactor too much code?

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  • Why isn't my javascript working on a local HTML file using UIWebView loadRequest:?

    - by Raphael
    Hi Everyone, I have a script that generates a temporary HTML file that has links to external Javascript files that it requires to run. <script src="file:///Users/raphaeldefranco/Library/Application Support/iPhone Simulator/User/Applications/BA9E724E-76BD-4F28-B224-54B4C73786D6/LogTen.app/Reports/Time by Year/../../Tools/PlotKit/Base.js" type="text/javascript"></script> The links are absolute and they are to the right place (There is a CSS link as well that uses the same method and it works fine). I've been using the following, which finds images and CSS just fine but for some reason won't run the .js. [webView loadRequest:requestObj]; I've tried changing the encoding of the files. I had a problem getting the CSS to work until the file was in unicode, but so far no luck. All the Script files are bundled with my project etc. Thanks in advance!

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  • How to resize a UISwitch?

    - by mshsayem
    I have made a custom UISwitch (from this post). But the problem is, my custom texts are a bit long. Is there any way to resize the switch? [I tried setBounds, did not work] Edit: Here is the code I used: @interface CustomUISwitch : UISwitch - (void) setLeftLabelText: (NSString *) labelText; - (void) setRightLabelText: (NSString *) labelText; @end @implementation CustomUISwitch - (UIView *) slider { return [[self subviews] lastObject]; } - (UIView *) textHolder { return [[[self slider] subviews] objectAtIndex:2]; } - (UILabel *) leftLabel { return [[[self textHolder] subviews] objectAtIndex:0]; } - (UILabel *) rightLabel { return [[[self textHolder] subviews] objectAtIndex:1]; } - (void) setLeftLabelText: (NSString *) labelText { [[self leftLabel] setText:labelText]; } - (void) setRightLabelText: (NSString *) labelText { [[self rightLabel] setText:labelText]; } @end mySwitch = [[CustomUISwitch alloc] initWithFrame:CGRectZero]; //Tried these, but did not work //CGRect aFrame = mySwitch.frame; //aFrame.size.width = 200; //aFrame.size.height = 100; //mySwitch.frame = aFrame; [mySwitch setLeftLabelText: @"longValue1"]; [mySwitch setRightLabelText: @"longValue2"];

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  • Setting UITabBarItem title from UINavigationController?

    - by fuzzygoat
    I have setup a UITabBarController with two tabs, one is a simple UIViewController and the other is a UINavigationController using second UIViewController as its rootController to set up a UITableView. My question is with regard to naming the tabs (i.e. UITabBarItem) For the first tab (simple UIViewController) I have added the following (see below) to the controllers -init method. - (id)init { self = [super init]; if(self) { UITabBarItem *tabBarItem = [self tabBarItem]; [tabBarItem setTitle:@"ONE"]; } return self; } For the other tab I have added (see below) to the second controllers init (rootController). - (id)init { self = [super init]; if(self) { UITabBarItem *tabBarItem = [[self navigationController] tabBarItem]; [tabBarItem setTitle:@"TWO"]; } return self; } Am I setting the second tabBarItem title in the right place as currently it is not showing? EDIT: I can correctly set the UITabBarItem from within the AppDelegate when I first create the controllers, ready for adding to the UITabBarController. But I really wanted to do this in the individual controller -init methods for neatness. // UITabBarController UITabBarController *tempRoot = [[UITabBarController alloc] init]; [self setRootController:tempRoot]; [tempRoot release]; NSMutableArray *tabBarControllers = [[NSMutableArray alloc] init]; // UIViewController ONE MapController *mapController = [[MapController alloc] init]; [tabBarControllers addObject:mapController]; [mapController release]; // UITableView TWO TableController *rootTableController = [[TableController alloc] init]; UINavigationController *tempNavController = [[UINavigationController alloc] initWithRootViewController:rootTableController]; [rootTableController release]; [tabBarControllers addObject:tempNavController]; [tempNavController release]; [rootController setViewControllers:tabBarControllers]; [tabBarControllers release]; [window addSubview:[rootController view]]; [window makeKeyAndVisible];

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  • How to retrieve the location of a control on the view?

    - by amok
    I have a button on a view, I want to add another button next to it when the first button is touched. Therefore I need it's top left corner to do the math. Here's what is puzzling me greatly: // this code is executed when the button is pressed NSLog(@"X:%f",moreButton.frame.origin.x); that returns on the first and second click the followings: 2010-04-24 22:58:25.883 iPad PopOver[8095:40b] X:-1.999002 2010-04-24 22:58:25.884 iPad PopOver[8095:40b] Y:0.000000 why and how can I get the x,y of an existing button on the view? (button created via IB) Thanks! mE ps: I have looked at similar posts and my code looks fine but I keep getting zeros (it's an ipad app if matters in any way)

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  • Animation on single UIWebView

    - by Shri
    I have searched quite a bit(sample one, Sample two) but cant seem to get the correct answer. I have a webview on my XYZ view controller class. When i press on a button, it takes an URL from an array and re-loads the same webview. Now I need to do the flip book animation on it. Same webview should be reloaded. That is the webview should rotate around its own axis 180/360 degree while the loading of next url is going on. Is this possible?

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  • iPhone: Custom UITableViewCell with multiple areas that respond to taps?

    - by Nick
    I've been asked to create a custom UITableViewCell with multiple areas that can be tapped. These areas won't have buttons or any graphics - they'll be invisible. 3 different methods will be called depending on which third of the cell the user taps i.e. || decrementFooCount || viewFooDetails || incrementFooCount || The cell has a few labels on it that need to be visible at all times - the fooName and fooCount. I'm thinking perhaps three hidden UIButtons over the cell? I also need to maintain the swipe to delete default behavior.

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  • Why does UIActionSheet cancel crahes my App?

    - by Tim Büthe
    I try to use the UIActionSheet within my iPhone App but have the following problem. When I tap the cancel button "I don't", the app crashes. When I remove the NSLog statement from the actionSheet:clickedButtonAtIndex: it does not. The "Yes, do it" button works just fine and I see the log statement in the console. What's wrong? - (void) doItWithConfirm { UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:@"do you really wanna do it?" delegate:self cancelButtonTitle:@"I don't" destructiveButtonTitle: nil otherButtonTitles:@"Yes, do it", nil]; [actionSheet showInView:self.view]; [actionSheet release]; } - (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex { NSLog(@"buttonIndex: %@", buttonIndex); }

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  • Locating the UIView that UITableView scrolls over

    - by Coocoo4Cocoa
    Hi all, I'm working on trying to obtain the UIView that UITableView scrolls over, if scrolling is enabled. Typically, the background is white, and if you push the UITableView out of its bounds, you'll see a background. I'm trying to set this background to a UIColor of blackColor. I can't seem to find the appropriate one to tag. I've tried the following code in my UIViewController: - (void)loadView { [super loadView]; UITableView *aTableView = [[[UITableView alloc] initWithFrame:self.view.bounds style:UITableViewStylePlain] autorelease]; [aTableView setScrollEnabled:YES]; [self.view setBackgroundColor:[UIColor blackColor]]; [self.view addSubview:aTableView]; self.tableView = aTableView; } The color still stays white. Seems I'm hitting the wrong UIView. Any idea? Thanks.

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  • Sencha 2 -need help for cf json data (for eg:CFJSONReader )

    - by usershaf
    I am new to sencha , and using sencha 2 mvc. I have a cfc returned json data, which I want to use in my list views. I have read about CFJsonReader and CFQueryReader, but both have been scripted for EXt Js 3 x. I cant see an mvc proper code for sencha 2 anywhere else.I tried many times and all in vein.Please some help suggest me/help me to solve my problem ...My outpur is like : {"QUERY":{"COLUMNS":["CLIENTID"],"DATA":[[1013],[1010],[1016],[1017],[1013]]},"TOTALROWCOUNT":5} Please pls help me...

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  • How do I make a UIAlertView happen only on the first start-up of an iPhone app?

    - by user309245
    I'm using the UIAlertView to make a pop-up happen once the app has started up. It works fine but I only want the pop up to happen on the first start-up of the app. At the moment I've got the UIAlertView in the AppDelegate class, after the application didFinishLaunching. Here is my code at the moment. - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { sleep(4); UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Welcome!" message:@"SAMPLE!!!" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil]; [alert show]; [alert release]; I'm new to app development so sorry if this is simple. Thanks in advance! :)

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  • Calling NSFetchedResultsController & CoreData experts

    - by JK
    I am having a few nagging issues with NSFetchedResultsController and CoreData, any of which I would be very grateful to get help on. Issue 1 - Updates: I update my store on a background thread which results in certain rows being delete, inserted or updated. The changes are merged into the context on the main thread using the "mergeChangesFromContextDidSaveNotification:" method. Inserts and deletes are updated properly, but updates are not (e.g. the cell label is not updated with the change) although I have confirmed the updates to come through the contextDidSaveNotifcation, exactly like the inserts and deleted. My current workaround is to temporarily change the staleness interval of the context to 0, but this does not seem like the ideal solution. Issue 2 - Deleting objects: My fetch batch size is 20. If an object is deleted by the background thread which is in the first 20 rows, everything works fine. But if the object is after the first 20 rows and the table is scrolled down, a "CoreData could not fulfill a fault" error is raised. I have tried resaving the context and reperforming the frc fetch - all to no avail. Note: In this scenario, the frc delegate method "didChangeObject...." is not called for the delete - I assume this is because the object in question had not been faulted at that time (as it is was outside the initial fetch range). But for some reason, the context still thinks the object is around, although is has been deleted from the store. Issue 3 - Deleting sections : When the deletion of a row leads to the deletion of a section, I have gotten the "invalid number of rows in section???" error. I have worked around this by removing the "reloadSection" line from the NSFetchedResultsChangeMove: section and replacing it with "[tableView insertRowsAtIndexPaths...." This seems to work, but once again, I am not sure if this is the best solution. Any help would be greatly appreciated. Thank you!

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  • Best practise - Accessing preferences globally

    - by JK
    User preferences for my app is store in NSUserDefaults. This includes a "theme" preference, which needs to be accessed frequently by multiple classes. I would prefer not to call "[[NSUserDefaults standardUserDefaults] objectForKey:..." repeatedly as it makes for inconcise code and I assume will incur overhead. What is the preferred and most concise method for accessing preferences in any class?

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  • Total Size of NSMutableArray object

    - by sj wengi
    Hi Folks, I've got an NSMutableArray that holds a bunch of objects, what I'm trying to figure out is how much memory is the array using. After looking at a couple of places I know about the sizeof call, and when I make it I get 32 bits (which is the size of the NSMutableArray object it self). Example code: NSMutableArray *temp = [[NSMutableArray alloc]init]; [temp addObject:objectxyz]; [temp addObject:objectabc]; [temp addObject:object123]; now I want to know the size :) Thanks, Sj

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  • iPhone UIImage Display Controller

    - by Bill Shiff
    Hello, I would like to be able to display a UIImage from within my app and support a lot of the functionality available in the built-in Photos app (i.e., pinch-to-zoom, pan, etc). I don't really want to write a bunch of code that someone has already written, so I'm wondering if there is a library out there already that I could just import into my project. I'm aware of the Three20 project, but I don't want to import a huge library if I don't have to. Is anyone aware of an available library that's already out there for displaying UIImages? Or part of some open-source project that can be pulled out on its own? Thanks!

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