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• On the iPhone, is it possible to find out which WIFI network we are connected to?

  - by Plumenator

  If yes, can we also get additional information about the network configuration?

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• Strategy for animation a lot of LED's - thread?, UIView animations? NSOperation? (iPhone)

  - by RickiG

  Hi I have to do some different views containing 72 LED lights. I built an LED Class so I can loop through the LED's and set them to different colors (Green, Red, Orange, Blue None etc.). The LED then loads the appropriate .png. This works fine, I loop over the LED's and set them. Now I know that at some time they will need to not just turn on/off change color, but will have to turn on with a small delay. Like an equalizer. I have a 5-10 views containing the 72 LED's and I would like to achieve the above with the minimum amount of memory/CPU strain. for(LED *l in self.ledArray) { [l display:Green]; } I simply loop as shown above and inside the LED is a switch case that does the correct logic. If this were actual LED's and a microController I would use sleep(100) or similar in the loop, but I would really like to avoid stuff like that for obvious reasons. I was thinking that doing a performOnThread withDelay would really be consuming, so would UIView animation changing the alpha and NSOperation would also be a lot of lifting for a small feature. Is there a both efficient and clever way to go around this? Thanks for any inspiration given:)

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• (iphone) How to access CGRect member variable inside c++ class?

  - by Eugene

  i have a c++ class with CGrect variable and i'm getting segfault when trying to access it. class Parent { //with some virtual functions/dtors }; class Child { public: void SetRect(CGRect rect) { mRect = rect; } CGRect GetRect() { return mRect; } int GetIndex() { return mIndex; } private: CGRect mRect; int mIndex; }; i'm doing CGRect rect = childPtr->GetRect(); from object c code and it segfaults. I printed *childPtr just before the call and rect looks fine with intended data value. int index = childPtr->GetIndex(); from same object c code(*.mm), works fine though. Any idea why I'm getting segfaults? Thank you edit - It's got something to do with virtual functions. (gdb) p singlePuzzlePiece-GetRect() Program received signal EXC_BAD_ACCESS, Could not access memory. Reason: KERN_PROTECTION_FAILURE at address: 0x00000001 0x00000001 in ?? () Cannot access memory at address 0x1 The program being debugged was signaled while in a function called from GDB. GDB remains in the frame where the signal was received. To change this behavior use "set unwindonsignal on" Evaluation of the expression containing the function (at 0x1) will be abandoned. (gdb) Somehow, the function is not properly compiled?

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• how can i fire button action event without any user action iphone xcode?

  - by Bala

  how can i fire button action event without any user action? pls give me any sample..

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• What will happen if I forgot to release the object in iPhone App?

  - by Tattat

  Will it auto release when the user quit the application? or it will stay in the machine until reboot? Also, have Apple provides any tools for developer to check whether they release the object or not.

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• What's a good way to have sample data on the iPhone/iPad?

  - by MikeN

  I have an iPad application that pulls in all of its data from an external web service. I am working on building in a demo mode that will use a cache of demo data stored on the device so it can be demoed and tried out without the web service connection (or an internet connection.) Is there a project or good practices standard to follow to model this type of sample data? I'm expecting JSON arrays/Dictionaries back from my web service, how could I build a function that uses hardcoded data to create the NSMutableData object I'd expect to get back from a JSON web request?

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• What constitutes a private API in an iPhone app?

  - by tweened

  I'm fairly new to Objective-C and am confused on what falls under the unbrella of a "private API" that could cause Apple to reject my app. Does this include adding methods to existing classes? For example, I found some code on stackoverflow to recolor the tab bar icons for UITabBars with this extension to the UITabBarItem class. Is this considered a "private API"? If not, what does? @interface UITabBar (ColorExtensions) - (void)recolorItemsWithImage:(UIImage *)image shadowColor:(UIColor *)shadowColor shadowOffset:(CGSize)shadowOffset shadowBlur:(CGFloat)shadowBlur; @end

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• How to set brigtness of ipad or iphone by programming?

  - by JohnWhite

  I have implementing pdf application for ipad.Now i want to set brightness in my application.Is it possible?Please help me for this problem. Thanks in advance.

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• Is there any way to force an iPhone application to relaunch?

  - by Jared P

  Basically -[UIApplication openURL:] would be perfect, if it wasn't for the fact that it doesn't work within the same application (at least on simulator -- if this works on device someone please tell me). It's not a super big deal though if it just relaunches w/o URLness since I can obviously just persist some data. The goal of this is to essentially free all memory in the application and call all of the loading procedures.

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• in what format data is put on the server for inapp purchase for iphone ?

  - by Abhijeet Barge

  In what format the content data is placed on server so that when user buy content from server he can use new content . also if this data is in compressed format then how to uncompress it in application ?

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• Is adaptive streaming (live http streaming) required of iphone apps that play video?

  - by jtw12

  We are creating a video intensive app and want to be sure that adaptive streaming is required (given that we need to write an automated transcoding and segmentation system to support this). Does anyone know if the YouTube app is using adaptive streaming?

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• Is there a way to have a NSUInteger automatically display commas in iPhone?

  - by marty

  Like if I had 29993 would there be a way to automatically have it be displayed as 29,993? Thanks

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• how to implement pagging in pdf for iphone applicaton?

  - by JohnWhite

  I have implemented pdf reader application in which i want to implement pagging how can i implement.Please advise me.

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• [IPHONE] How can I loop through all subviews of a UIView, and their subviews and their subviews...

  - by nonono

  Hello, How can I loop through all subviews of a UIView, and their subviews and their subviews... Thank you.

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• How can I run one app from another app in iphone?

  - by Fatemeh

  Hi, On some app , I see when one link touched , use safari for open link and quit from current app. I want use from this feature for run messages app from other app , Can I do this? if yes, how can? thanks,...

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• iPhone: Where can I find those arrow icons used on the toolbar of the Photo Library (Camera Roll)

  - by Phamer

  Hello. I am looking for those arrow icons (a left white arrow and a white right arrow) that are used on the lower toolbar of the Photo Library (or Camera Roll). I also have seen them on the Facebook app and some other custom apps. I am surprised that they are not built in "UIBarButtonSystemItem" icons. Can anybody point me to these icons?

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• Does this collection operator method also work on the iPhone?

  - by dontWatchMyProfile

  NSNumber *salaryOverhead = [anEmployee valueForKeyPath:@"[email protected]"];

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• How to show a UINavigationController with an UIButton on the Iphone?

  - by Claudio

  Hi, in my application the first view is an UIView with a couple of uilabel and an uibutton to do the login. I would to show an uinavigationcontroller with a table after the login, so with the action of the button. I know how to set up a working Navigation Controller starting with the Xcode Template but i dont know how to load this as a "Second View" Any help?

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• How to retrive content of one table from database in sqlite for iphone?

  - by Warrior

  I am using Sqlite database in my app.I Have 3 tables in database(group, category & categorygroup).I want to retrieve the contents from the category table with reference to the primary key of the group table.category group act as a junction table which as both the primary keys of group and category .How can i achieve that.Please help me out,Thanks

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• (iphone) Does it make difference to provide more images when the object is moving in a straight line?

  - by Eugene

  Hi. Among many animation scenarios, there are times when I want an object to move a straight line then change direction, move another straight line and so forth. Assuming I would use either UIImageView or CABasicAnimation with image arrays. Does it make difference to provide more images when the object is moving in a straight line? For example, point1 ---------point2 ------- point3 (all points are in a straight line) Providing an image at point2 to UIImageView or CABasicAnimation, gives any better animation result, assuming I don't need to change the animation speed along the course? If I were flashing each image myself, yes it would make the animation look smooth, but I'm giving the images to UIImageView/CABasicAnimation, and wonder what they do. Thank you

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• iPhone Rotation ... won't rotate .. plz help

  - by user253700

  My view hierarchy looks like this: tab bar - navigation bar - table view - view 1 - view 2 (UIWebView) How can I rotate view 2 so it can be displayed in both landscape & portrait mode?

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• How to set iPhone tab bar icon in code?

  - by Mark Struzinski

  I am using the same ViewController for several different views. When instantiating the ViewController for a specific view, is there an easy way to specify the tab bar icon via code?

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• How to append an integer to a const char value in iphone?

  - by Warrior

  I have sql query statement which used to display the contents in the table.The sql statement consist of a where clause which is to be appended with numeric value as 1 ,2 3 etc depends upon the previously selected content.I am having the numeric value as int and i want it to append to sql statement which is const char.how can i append both the values.Please help me out. My query is == select * from Book where id=1; i have the id value is integer Thanks.

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• Objective C / iPhone: How to add a timer to let the text update?

  - by Tattat

  I want to write an application that allow user to count down the time. The time will be displayed using label. I want to update the label every second, how can I do it? or which API is suitable for me to do this? thz in advance.

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• Is it still being prohibited changing lock screen(wallpaper) in iPhone OS 3.x?

  - by Eonil

  I checked this posting, so it was impossible to do it. But it's old posting, and somebody are saying me there is an app which can change wallpaper(lock screen). Is this allowed now?

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