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  • IPhone/Objective-c RSA encryption

    - by Paul
    Hello, I have been google-ing and researching for an answer on how to do a simple RSA encryption using objective-c on an iphone. The main problem i have is that i have been supplied the Exponent and Modulus as an NSData object and i need to then convert them to a SecKeyRef object in order to perform the RSA encryption. Does anyone have any idea how to do that or have any useful hints? Many thanks!

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  • iPhone NSDate - get time in milliseconds and store in coredata

    - by satyam
    I'm implementing iphone app with coredata functionality. I've an attribute in entity "NSDate" which stores the date and time when the record is added. I'm adding records at a faster rate. About 1 record per 25 milli seconds I want to store the date along with milli seconds so that I can retrieve the data in descending order. How can I do this?

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  • Embedding an offline Dashcode application in a UIWebView in an iPhone application

    - by Nimrod
    In order words, can anyone tell me the basics of how to create a "hybrid" iPhone application? I want to load the web content (the Dashcode app itself) from the native application's application bundle. I've gotten this to partially work, but some content won't display and it otherwise seems like Dashcode is assuming a certain Safari environment or something that I don't seem to have in my UIWebView. Can anyone provide a link to some sample code that embeds a Dashcode project into a cocoa touch Xcode project? (I did search around Google for a bit trying to find something and I failed to come up with anything worthwhile, except for some books that I might eventually buy if the approach seems worthwhile.)

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  • Disabling Magnifying Glass in UITextView in an iPhone App

    - by tgm
    I want to display text and I want to be able to know where in this text a user touches. Because the text could be long, I wanted to use a UITextView so that wrapping and everything would be taken care of. I want my own event handling for when a touch begins or moves. My problem is that the magnifying glass and select/select all menu are interrupting my touchesMoved events. How can i disable the magnifying glass, but still have user interaction enabled so that I can detect the touches?

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  • iPhone SDK / Facebook Connect: Using a custom login dialog

    - by boliva
    Exactly what the title says. Is it possible to use Facebook Connect (or any other means of FB integration) in a native iPhone app without resorting to the built in login dialog (which looks awful)? Something where I could create my own custom login screen asking for the facebook login username and password and then using the fbconnect native methods to validate that info and retrieve a valid session?

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  • iPhone SDK - Accessing other Application Folders

    - by Kevin
    Hello everyone, I know that you can access your own application files using NSDocumentDirectory and such, but can you do that on other applications. For example, if I wanted the Documents of another application, would it be possible to get that information? From the iPhone OS Library as directed here. Sincerely, Kevin

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  • Create Audio file on iPhone/iPad from many other audio files (mixer)

    - by Brian
    I am trying to create something similar like Piano app on the iPhone. When people tap a key, it play a piano note. Basically, there will have only 7 notes (C) at the moment. Each note is a .caf file and its length is 5 seconds. I do not know if there is any way to save the song user played and export to mp3/caf format? The AVAudioRecord seems only record from the microphone input. Many thanks

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  • iphone dev: UIImageview subclass interface builder - how to call custom initializer

    - by ninjasmith
    hi. I messing with iphone developement. I have a uiimageview subclass that I want to use to detect touches. I have sucessfully added to interfacebuilder and I can detect a touch in my UIImageview subclass within my application so all is good on that front. however my UIImageView subclass has a custom initializer which is not called when it is created in interface builder. if I manually initialize the UIImageview and add it programmatically I think it will work but then I lose the ability to 'see' my positioning in Interface builder. how can I either 1) 'see' a uiimageview in interface builder that is added in code? (not possible?) 2) call my custom initializer when the subclass is instantiated in interfacebuilder. thanks

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  • MKMapView memory usage grows out of control with setRegion: calls

    - by Kurt
    Hi, I have a single MKMapView instance that I have programmatically added to a UIView. As part of the UI, the user can cycle through a list of addresses and the map view is updated to show the correct map for each address as the user goes through them. I create the map view once, and simply change what it displays with setRegion:animated:. The problem is that each time the map is changed to show a new address, the memory usage of my program increases by 200K-500K (as reported by Memory Monitor in Instruments). According to Object Allocations, it appears that a lot of 1.0K Mallocs are happening each time, and the Extended Detail pane for these 1.0K allocations shows that the Responsible Caller is convert_image_data and the Extended Detail pane shows that this is the result of [MKMapTileView drawLayer:inContext:]. So, seems likely to me that the memory usage is due to MKMapView not freeing memory it uses to redraw the map each time. In fact, when I don't display the map at all (by not even adding it as a subview of my main UIView) but still cycle through the addresses (which changes various UILabels and other displayed info) the memory usage for the app does NOT increase. If I add the map view but never update it with setRegion:, the memory also does NOT increase when changing to a new address. One more bit of info: if I go to a new address (and therefore ask the map to display the new address) the memory jumps as described above. However, if I go back to an address that was already displayed, the memory does not jump when the map redraws with the old address. Also, this happens on iPad (real device) with 3.2 and on iPhone (again, real device) with 3.1.2. Here's how I initialize the MKMapView (I only do this once): CGRect mapFrame; mapFrame.origin.y = 460; // yes, magic numbers. just for testing. mapFrame.origin.x = 0; mapFrame.size.height = 500; mapFrame.size.width = 768; mapView = [[MKMapView alloc] initWithFrame:mapFrame]; mapView.delegate = self; [self.view insertSubview:mapView atIndex:0]; And in response to the user selecting an address, I set the map like so: MKCoordinateRegion region; MKCoordinateSpan span; span.latitudeDelta=kStreetMapSpan; // 0.003 span.longitudeDelta=kStreetMapSpan; // 0.003 region.center = address.coords; // coords is CLLocationCoordinate2D region.span = span; mapView.region.span = span; [mapView setRegion:region animated:NO]; Any thoughts? I've scoured the net but haven't seen mention of this problem, and I've reached the limits of my Instruments knowledge. Thanks for any ideas.

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  • How to "eval" Objective-C code in iPhone

    - by DJYod
    Hi, does a method such as "eval" in Javascript exist in Objective-C (iPhone SDK) ? I use PhoneGap and I want to create a window which is specific for each of my project and I can't use the html file... so I want from JS call a method and give in argument OC code to ben interpreted ... Any idea? Thank you for your help

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  • Using the PayPal API in an iPhone application

    - by jaynaiphone
    Hello I want to use Paypal in my iphone application, I have find the soapRequest to integrating the paypal API. My code is NSString *soapMessage = [NSString stringWithFormat: @"<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" "<SOAP-ENV:Envelope xmlns:xsi= \"http://www.w3.org/2001/XMLSchema-instance\" xmlns:SOAP-ENC=\"http://schemas.xmlsoap.org/soap/encoding/\" xmlns:SOAP-ENV=\"http://schemas.xmlsoap.org/soap/envelope/\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" SOAP-ENV:encodingStyle=\"http://schemas.xmlsoap.org/soap/encoding/\">\n" "<SOAP-ENV:Header>\n" "<RequesterCredentials xmlns=\"urn:ebay:api:PayPalAPI\">\n" "<Credentials xmlns=\"urn:ebay:apis:eBLBaseComponents\">\n" "<Username>api_username</Username>\n" "<Password>api_password</Password>\n" "<Signature/>\n" "<Subject/>\n" "</Credentials>\n" "</RequesterCredentials>\n" "</SOAP-ENV:Header>\n" "<SOAP-ENV:Body>\n" "<specific_api_name_Req xmlns=\"urn:ebay:api:PayPalAPI\">\n" "<specific_api_name_Request>\n" "<Version xmlns=urn:ebay:apis:eBLBaseComponents”>service_version</Version>\n" "<required_or_optional_fields xsi:type=”some_type_here”>\n" "</required_or_optional_fields>\n" "</specific_api_name_Request>\n" "</specific_api_name_Req>\n" "</SOAP-ENV:Body>\n" "</SOAP-ENV:Envelope>\n"]; NSLog(@"Soap message===%@",soapMessage); NSString *parameterString = [NSString stringWithFormat:@"USER=%@&PWD=%@&SIGNATURE=%@&VERSION=57.0&METHOD=SetMobileCheckout&AMT=%.2f&CURRENCYCODE=USD&DESC=%@&RETURNURL=%@", userName, password, signature, donationAmount, @"Some Charge", returnCallURL]; NSLog(parameterString); NSURL *url = [NSURL URLWithString:paypalUrlNVP]; NSMutableURLRequest *theRequest = [NSMutableURLRequest requestWithURL:url]; NSString *msgLength = [NSString stringWithFormat:@"%d", [parameterString length]]; [theRequest addValue: msgLength forHTTPHeaderField:@"Content-Length"]; [theRequest setHTTPMethod:@"POST"]; [theRequest setHTTPBody: [parameterString dataUsingEncoding:NSUTF8StringEncoding]]; NSURLConnection *theConnection = [[NSURLConnection alloc] initWithRequest:theRequest delegate:self]; if( theConnection ){ webData = [[NSMutableData data] retain]; // [self displayConnectingView]; }else{ NSLog(@"theConnection is NULL"); } But here I am not getting the value of paypalUrlNVP. How can i get it?? And if possible then please give some example of paypalAPI integration in iphone. I also want to use checkout functionality.I am new in this field so I have no idea about it. So, kindly give me whole sample code. Thanks in advance.

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  • iPhone HUD style progress bar

    - by Alexander
    I've been wanting to create a HUD style loading bar like the SMS app on the iPhone used to have (http://www.jonokane.com/images/blog/iphoneFixProblem.jpg) but don't know how. I was wondering if anyone has done this before or if there is a tutorial somewhere for it? I just think it looks so nice and would like to use it rather than the built in loading progress bar. Thanks a bunch!

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  • iPhone static libraries: How to hide instance variable

    - by Frenzy
    I'm creating a static library to share using the following guide: http://www.amateurinmotion.com/articles/2009/02/08/creating-a-static-library-for-iphone.html In one of the functions, I return a "SomeUIView" which is a subclass of UIView and is defined in the public header, however I don't want to expose the internal instance variable of SomeUIView in the public header. I've tried using categories for a private internal header file for SomeUIView, but I keep running into "Duplicate interface declaration for class 'SomeUIView'". Does anyone know how to do this? Thanks!

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  • Preventing sleep in Titanium for iPhone

    - by Morten J
    I'm trying to read the accelerometer for a longer period of time (between one and two hours). However, when the iPhone goes to sleep and locks, the reading of the accelerometer readout is paused. My setInterval timer seems to be running fine though. I can also play sounds. I see two solutions a) Find a way to read the accelerometer while locked b) Find a way to prevent the lock I'm using Titanium with JavaScript.

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  • Iphone multiple images from uiimagepicker

    - by yuukan
    Hi, I'm developing an Iphone application where you select photos from your gallery and then make a new album, the problem it's that I am only getting 1 image at a time. My problem it's that I need to select multiple images at a time or even the hole album. How can I do that?

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  • NSString drawAtPoint Crash on the iPhone (NSString drawAtPoint)

    - by Kyle
    Hey. I have a very simple text output to buffer system which will crash randomly. It will be fine for DAYS, then sometimes it'll crash a few times in a few minutes. The callstack is almost exactly the same for other guys who use higher level controls: http://discussions.apple.com/thread.jspa?messageID=7949746 http://stackoverflow.com/questions/1978997/iphone-app-crashed-assertion-failed-function-evictglyphentryfromstrike-file It crashes at the line (below as well in drawTextToBuffer()): [nsString drawAtPoint:CGPointMake(0, 0) withFont:clFont]; I have the same call of "evict_glyph_entry_from_cache" with the abort calls immediately following it. Apparently it happens to other people. I can say that my NSString* is perfectly fine at the time of the crash. I can read the text from the debugger just fine. static CGColorSpaceRef curColorSpace; static CGContextRef myContext; static float w, h; static int iFontSize; static NSString* sFontName; static UIFont* clFont; static int iLineHeight; unsigned long* txb; /* 256x256x4 Buffer */ void selectFont(int iSize, NSString* sFont) { iFontSize = iSize; clFont = [UIFont fontWithName:sFont size:iFontSize]; iLineHeight = (int)(ceil([clFont capHeight])); } void initText() { w = 256; h = 256; txb = (unsigned long*)malloc_(w * h * 4); curColorSpace = CGColorSpaceCreateDeviceRGB(); myContext = CGBitmapContextCreate(txb, w, h, 8, w * 4, curColorSpace, kCGImageAlphaPremultipliedLast); selectFont(12, @"Helvetica"); } void drawTextToBuffer(NSString* nsString) { CGContextSaveGState(myContext); CGContextSetRGBFillColor(myContext, 1, 1, 1, 1); UIGraphicsPushContext(myContext); /* This line will crash. It crashes even with constant Strings.. At the time of the crash, the pointer to nsString is perfectly fine. The data looks fine! */ [nsString drawAtPoint:CGPointMake(0, 0) withFont:clFont]; UIGraphicsPopContext(); CGContextRestoreGState(myContext); } It will happen with other non-unicode supporting methods as well such as CGContextShowTextAtPoint(); the callstack is similar with that as well. Is this any kind of known issue with the iPhone? Or, perhaps, can something outside of this cause be causing an exception in this particular call (drawAtPoint)?

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  • How to generate Perlin Noise on an iPhone

    - by Andre
    Hi, I want to create an animated perlin noise on the iPhone, so I can ultimately do something like this: http://dl.dropbox.com/u/1977230/example.png I've looked and looked, but can't find anything similar or a way to actually display a Perlin Noise. I've been told to look at OpenGL ES, but even searching for an example of Perlin noise or a lava/plasma effect doesn't result in anything. I'd really appreciate some help on this one. Thanks guys, Andre

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  • External iPhone Cryptography Libs

    - by AO
    Are there any legal problems using external crypto libs in my iPhone application? I know that Apple has to comply to US cryptography export rules but do I as a developer have any responsibility? How does it work?

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  • Xcode Fails to Launch iPhone Simulator

    - by senfo
    I am attempting to launch the iPhone simulator from Xcode, but I keep getting the following error: Error from Debugger: Failed to launch simulator: Operation failed with underlying error: 4294967253. I've found a number of posts where Xcode failed to launch the simulator, but none of them match the specific error code I'm receiving.

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  • Compiling NyARToolKit on iPhone 3.0

    - by Vivas
    Hi, Has anyone here succeeded in getting NyARToolKit to run on iPhone 3.0? I'm fighting with this but I am at least down to a couple of errors: Duplicate symbol _spriteVertices (referring to the 3DGraphicsView & NyARToolKitCrossCompileAppDelegate). glView.delegate = self; (error in NyARToolKitCrossCompileAppDelegate.m) Any suggestions would be greatly appreciated.

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  • Youtube video processing on iPhone

    - by Chonch
    Hey In my iPhone app, I want to load a video from youtube, perform some basic image processing on it and display it to the user. I am using openCV to do my image processing, and I know I can use it for grabbing all of the frames from the video as well (cvRetrieveFrame). My only problem is that cvRetrieveFrame expects to get its source of type CvCapture* which can be created either by a camera source or by a file name. How can I set a youtube video file as the source for CvCapture*? Thanks,

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