iphone

Limit iPhone in-app purchase by user's country

Hello everyone. I'm a product manager who works for a small internet company that is developing an iPhone application for a social network. We monetize by offering limited and premium memberships to users (premium members get additional features not available to limited members). For billing on the web, we use a 3rd-party payment gatew...

Play an audio file using RemoteIO and Audio Unit

I am looking at Apple's 'aurioTouch' example for the iPhone and I would like to play an mp3 or wav instead of using the built in mic. I am very new to the audio portion of iPhone programming, but I think I need to modify the SetupRemoteIO(...) function and replace the AudioComponent named 'comp' with a custom AudioComponent that plays a ...

How do you create an invisible button that covers the whole screen including navigation controller?

I have a simple tableview that navigates to a detailed view with a navigation controller. In the detailed view I need to create a button which when pressed isolates all other buttons displayed on the screen including the navigation controller back button. I know how to get the invisible button to cover most of buttons the screen but I ca...

iPhone hitTest broken after rotation

Hi all, I have a UIView that contains a number of CALayer subclasses. I am using the following code to detect which layer a touch event corresponds to: - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { UITouch *touch = [touches anyObject]; CGPoint touchPoint = [touch locationInView:self]; NSLog(@"%@,%@",NSStri...

Help creating custom iPhone Classes

This should be a simple question, but I just can't seem to figure it out. I'm trying to create my own class which will provide a simpler way of playing short sounds using the AudioToolbox framework as provided by Apple. When I import these files into my project and attempt to utilize them, they just don't seem to work. I was hoping some...

How to know when the user touches the OK button of the last StoreKit alert "Thank you. Your purchase was successful"?

I have integrated "In App Purchase" in a game to let the user unlock more levels. Everything works fine, but I have a little problem with the last alert "Thank You. Your purchase was successful. [OK]". My program gets informed that the transaction was successfully completed before this last alert pops up and so my game starts running aga...

Dynamically add a new row as Add in UITableView in edit mode?

I have a table view with 0 or n rows of data from datastore. I added a customized Edit button on the right of the view's navigation bar. By default, when the edit button is clicked, in the action event, I set the view as edit mode: [self.tableView setEditing:YES animated:YES]; I would like to add a row at the end of the table view wit...

UIButton and UIControlEventState issue

I'm having a very specific "bug" in my iPhone application. I'm setting two images for the highlighted and normal states of a button. It works as expected when you "press" and then "touch up" at a slow pace, but if you click/tap it quickly, there's a noticeable flicker between states. Is this a known bug or am I setting the states incorre...

Storing secret keys on iPhone source and project resources

Is storing secret keys (internal use passwords and such) on iPhone source code and project resources (such as plist files) secure? Obviously nothing is 100% secure, but can this information be extracted easily from an installed app? How do you recommend storing these keys to use them in the source code? Just in case, this question is...

Automatically determining the size of a UITableViewCell

I am trying to determine the size of a UITableCellView. The reason being that I am using one class for different orientations and devices. The cell contains one subview that is supposed to fill the entire cell. Right know I'm doing this in the UITableViewCell's init method: if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad){ ...

Save previous context

I use CALayers and I`ve override this delegate -(void)drawLayer:(CALayer*)layer inContext:(CGContextRef)context { //draw some rectangle depends on some custom parameters } Then I want to add to this layer another rectangle. And when I call [layer setNeedsDisplay] I expect to see 2 different rectangles in layer but I see only las...

NSDecimalNumber multiplication strangeness

ExclusivePrice, quantity are both NSDecimalNumbers. NSDecimalNumber *price = [exclusivePrice decimalNumberByMultiplyingBy:quantity]; NSLog(@"%@ * %@ = %@", exclusivePrice, quantity, price); The result I get: 2010-04-05 00:22:29.111 TestApp[13269:207] 65 * 2 = -0.00000000000000000000000000000000000000000000000000000000000000000000000...

Checking the time in Objective-c?

how can I get the current time in hh:mm format? I need to be able to tell between AM and PM and compare between the current time and a second time as well. I'm sure it's a silly function but i can't seem to figure it out. ...

Custom annotationView images revert to pins when clicked

I'm displaying custom images on a map (instead of the default pins) using the code below. However, when I tap on an item (and the callout appears), the image reverts to the default red pin. How can I keep my custom image, even when the callout is displayed? - (MKAnnotationView *) mapView:(MKMapView *)map viewForAnnotation:(id <MKAnnotat...

How to calculate how many business days are between two dates?

A friend asked me yesterday if this was possible on the iPhone. I took a look at NSCalendar and all the related Classes but couldn't find a solution to this. So I thought about this approach: If I had two dates dateA and dateB, I would have to make a for-loop and iterate over every single day in this interval. Then I would count the bus...

Could SqueakNOS or PharoNOS made to run an iPhone or iPad to Form a DynaBook?

Not considering legal issues I would be very interested if it would be possible to run one of those on the bare metal of the iPad/Phone ARM-Architecture. ...

download iphone sample code from apple

the iphone sdk documentation has links to sample code, but you have to download them individually from the web. Is there a bundle you can download all at once from apple ? For example, reading the first iphone tutorial at switchonthecode, the first new word I came across was UIApplication. There are 5 samples on the web... ...

Uilabel effect like in games

hi all ! Does anyone know how to make a UILabel appear letter by letter like you can see in some games or other. thanks ...

How does one get UI_USER_INTERFACE_IDIOM() to work with iPhone OS SDK < 3.2

Apple advises using the following code to detect whether running on an iPad or iPhone/iPod Touch: if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) { // The device is an iPad running iPhone 3.2 or later. // [for example, load appropriate iPad nib file] } else { // The device is an iPhone or iPod touch. // [for example, l...

What class should manage/control the CALayers in my view using proper MVC?

I have a ViewController with a view (UIView). I need to handle touches, run some logic, check against model data, and and add and remove sublayers to the view based on those touches. Then I need to update the model based on the results. Should I have: ViewController - manage touches, get/set model data, add/remove sublayers UIView ...