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  • After adding a UILabel to my view, how do I delete it?

    - by Travis
    I have added a UILabel to my view programmatically like this: myLabel = [[UILabel alloc] initWithFrame:CGRectMake(0.0f, 0.0f, 100.0f, 30.0f)]; myLabel.center = CGPointMake(160.0f, 120.0f); myLabel.backgroundColor = [UIColor clearColor]; myLabel.textColor = [UIColor whiteColor]; myLabel.font = [UIFont fontWithName:@"Helvetica" size: 18.0]; myLabel.textAlignment = UITextAlignmentCenter; myLabel.text = @"Hello"; [self.myView addSubview:myLabel]; To add a label to my view. What I can't seem to find out is once I'm done w/ the label (at a future point) how can I delete it from the view? [myLabel release] doesn't seem to work which I think makes sense because the view it's added to probably retained it's over reference. So what is the best practice?

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  • how do I call create a name of a button variable in a code, with a number in it? (hard to explain)

    - by Sam Jarman
    Ive got a int, that is changed in a previous method, that now has to be part of the name of a button variable eg int numberFromLastOne; numberFromLastOne = 4; I then want to get 'button4' to do something. Could i use something like this? [[button@"%d", numberFromLastOne] doSomethign:withSomethignElse]; Ive never had to do something this before.... Any ideas would be appreciated :) Sam

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  • iPhone - why does AVAudioPlayer currentTime return a negative value?

    - by lostInTransit
    Hi When does the AVAudioPlayer's currentTime method return a negative value? The audio file is playing (I am putting in a check before getting currentTime) but making a call to currentTime returns a negative value. Any ideas? Thanks if(thePlayer != nil && [thePlayer isPlaying]){ double playerTime = [thePlayer currentTime]; NSLog(@"Player Time: %f", playerTime); } Output Player Time: -0.019683

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  • UIViewController prevent view from unloading

    - by Ican Zilb
    When my iPhone app receives a Memory warning the views of UIViewControllers that are not currently visible get unloaded. In one particular controller unloading the view and the outlets is rather fatal. I'm looking for a way to prevent this view from being unloaded. I find this behavior rather stupid - I have a cache mechanism, so when a memory warning comes - I unload myself tons of data and I free enough memory, but I definitely need this view untouched. I see UIViewController has a method 'unloadViewIfReloadable', which gets called when the Memory Warning comes. Does anybody know how to tell Cocoa Touch that my view is not reloadable? Any other suggestions how to prevent my view from being unloaded on Memory Warning? Thanks in advance

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  • Which audio playback technology do I need for this?

    - by mystify
    I have trouble choosing the right audio playback technology. There's a ton of technologies to use on the iPhone, it's so confusing. What I need to do is this: start playing short sounds ranging between 0.1 and 2 seconds high quality playback, no crackle (I heard some of the iPhone audio playback technologies do a crackle sound on start or end, which is bad!) ability to start playback of a sound, while there's already another one playing right now (two, three or more sounds at the same time) What would you suggest here, and why? Thanks :-)

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  • Can we ask user for credit card number or paypal details,store credit card number on our server, can

    - by Hiren Gujarati
    Can we get credit card number from user or paypal details & use them for premium service of our application ? is apple accept this application if we directly get this information & use it in our api on server for transaction. Using ssl will be accpted by apple ? I have check from 1) http://stackoverflow.com/questions/1763306/credit-card-purchase-of-physical-goods-via-an-iphone-application 2) http://stackoverflow.com/questions/1707701/receiving-payments-trough-paypal-and-credit-card 3) http://stackoverflow.com/questions/1366864/using-the-paypal-api-in-an-iphone-application but not clear about all...

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  • send keystrokes from iphone to PC

    - by Matt Facer
    hi guys. I'm looking to create a simple app which will send keystrokes from an iphone to a PC. I understand that I will need to have a program on my PC "listening"... I've been looking in to AsyncSocket and NSStream, but there are no tutorials which really make it clear to understand. Does anyone know if this is right? I basically want to interact with a program on my PC which listens for keystrokes to control it. Does anyone know of a tutorial or place where I could start to learn this? (I've written iphone apps before, but I am new to networking)

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  • Backspace in UITextView substringToIndex , app is crashing .

    - by user271753
    Hey Guys check this code ( My Custom Keyboard) : -(IBAction) updateTextBackSpace:(id)sender { if([txtview.text length]>0) { NSString *deletedLastCharString = [txtview.text substringToIndex:([txtview.text length]-1)]; [txtview setText:deletedLastCharString]; } else { NSLog("End"); } I am able to erase the letters ( backspace ) but after the first letter is erased and if I press backspace one more time then the application crashes .. AND the main thing is that I can't figure out how to change this code so that , I can erase any text in any give line at the cursor, the backspace starts to erase from end of the line . Please Help

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  • Interface Builder Does Not Recognize Toolbar Buttons

    - by Sheehan Alam
    I created 4 UIButton's that are Custom and Plain in IB. I added a background image to them and then placed them onto my UIToolbar. I created IBActions and hooked up all of the buttons I did not create @property for the buttons, but 3/4 of them appear on my toolbar and they work. Why isnt my 4th button appearing? If I need to declare an @property for them, will it be a UIToolbarButtonItem or a UIButton?

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  • int vs NSNumber vs NSInteger

    - by Moshe
    I have a line of code that will work differently depending on the datatypes "day" and "1". I believe it is the following although I will check my source code later. day = day + 1; Does this make sense? What would the differences be?

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  • Get string value of class propery names in Objective-C

    - by Flash84x
    I have the following class definition. Contact.h #import <CoreData/CoreData.h> @interface Contact : NSManagedObject { } @property (nonatomic, retain) NSString * City; @property (nonatomic, retain) NSDate * LastUpdated; @property (nonatomic, retain) NSString * Country; @property (nonatomic, retain) NSString * Email; @property (nonatomic, retain) NSNumber * Id; @property (nonatomic, retain) NSString * ContactNotes; @property (nonatomic, retain) NSString * State; @property (nonatomic, retain) NSString * StreetAddress2; @property (nonatomic, retain) NSDate * DateCreated; @property (nonatomic, retain) NSString * FirstName; @property (nonatomic, retain) NSString * Phone1; @property (nonatomic, retain) NSString * PostalCode; @property (nonatomic, retain) NSString * Website; @property (nonatomic, retain) NSString * StreetAddress1; @property (nonatomic, retain) NSString * LastName; @end Is it possible to obtain an array of NSString objects with all of the properties by name? Array would look like this... [@"City", @"LastUpdated", @"Country", .... ]

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  • Android Asyncronous calls

    - by Josemalive
    Hi, Im making an asyncronous call from a client class to a server class. From this client class i call the method "execute", and in background the server class call the "doInBackground" method. How could i know from the client class when the "doInBackground" is finished? Should i implement an event on the server class and suscribe to it from the client one? Thanks in advance. Best Regards. Josema.

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  • how to search in contact list like messages application in iphone with adding selected item in front

    - by Hiren Gujarati
    I needs to make application like messages application in iphone. Just needs To:(search text) and below it there is contact list. If user type in search text then list automatically filtered & when user select particular row then it is visible in front of To: & then again user is able to search text like in messages application. You can see the following video http://www.apple.com/iphone/iphone-3gs/messages.html#video that shows how recipients are added one by one. Please suggest your way for this.. Thanks in advance.

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  • Animating an Image

    - by Viral
    hi friends, I m creating a game, in that i want to use some animation, but i m new to animations. I want to create an image ,as soon as i click on imageview, the image should come in bouncing manner as if it is a Ball, so is it possible to do so??? The image is predefined for the game.and it must come after touch begin event occures, can any one help me??? regards viral.

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  • How to check when animation finishes if animation block is

    - by pumpk1n
    I have a controller which adds as subviews a custom UIView class called Circle. Let's call a particular instance of Circle, "circle". I have a method in Circle, animateExpand, which expands the circle by animating the view. In the following code (which lives in the controller) I want to alloc and init a circle, add it to a NSMutableArray circleArray, animate the expansion, and at the end of the expansion, i want to remove the object from the array. My attempt: Circle *circle = [[Circle alloc] init]; [circleArray addObject:circle]; [circle animateExpand]; [circleArray removeObjectIdenticalTo:circle]; [circle release]; The problem is [circleArray removeObjectIdenticalTo:circle]; gets called before the animation finishes. Presumbly because the animation is done on a seperate thread. I cant implement the deletion in completion:^(BOOL finished){ }, because the Circle class does not know about a circleArray. Any solutions would be helpful, thanks!

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  • Button Application- iPhone Application

    - by Extremely frustrated
    I am a meganoob in iPhone Application programming. All I want to do is make an application with a single button. When you press the button, it plays an audio file. The button is just two images, one for the normal state and one for the pressed state. I have no clue how to get from point A to point B, it seems so straightforward in web design, why can't it be like that for this too? Anyone out there willing to drop some hints?

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