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• What are the benefits of Android way of "saving memory" - explicitly passing Context objects everywhere?

  - by Sarge Borsch

  Turned out, this question is not easy to formulate for me, but let's try. In Android, pretty much any UI object depends on a Context, and has defined lifetime. It also can destroy and recreate UI objects and even whole application process at any time, and so on. This makes coding asynchronous operations correctly not straightforward. (and sometimes very cumbersome) But I never have seen a real explanation, why it's done that way? There are other OSes, including mobile OSes (iOS, for example), that don't do such things. So, what are the wins of Android way (Activities & Contexts)? Does that allow Android applications to use much less RAM, or maybe there are other benefits?

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• Converting to a mac-book pro for multi disciplined development.

  - by DeanMc

  Hi all, I am in a bit of a bind. I have been contracted to create a small suite of applications for Android, iOS and WP7. Currently I am also on the market for a new notebook for development. Now the issue I have is I can either buy a consumer grade macbook and a laptop or I could just buy an 8gb Ram, SSD, i7 mackbook and virtualise windows 7. I have never used a mac or macbook before so before I go purchase anything I would like to know what your thoughts are on this. Has anyone any experience with this?

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• BOX2D Kinematic Platform with parallax layer

  - by Marcell

  I am using a kinematic body for my moving platform on x-axis, so I set the linear velocity to b2vec2(5,0). When the player jump on the platform, it works like it is suppose to. But the thing is that my platform is on the obstacle layer and I am moving it with the parallax layer. So if I setTransform the kinematic platform to follow the obstacle layer than it's physics will not work and the player will slip-off the platform. I'm developing for iOS and using cocos2d api. Anyway around this?

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• Cross-Platform Automated Mobile Application UI Testing

  - by thetaspark

  My dissertation is about developing a tool for testing mobile applications from the GUI. Primary device is Android, but it should support Blackberry or iOs etc. I found some frameworks using Google, e.g MonkeyTalk. I am not so sure, but what I want to develop might be a mini MonkeyTalk, with minimal functionality, focused on the GUI of the application(s) to be tested. My questions: What framework(s)? I am good with Java. Can I use the xUnit family for this, and how? What should I be reading/studying? Any suggestions, links for tutorials, documentations, howtos, etc., would be very helpful. Thanks in advance.

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• Override a static library's global function

  - by Jason Madux

  Not sure if this question belongs here or on SO, but posting here for now :) I'm trying to override a global function defined in "StaticLib" for my iOS application but the compiler keeps giving me the duplicate symbol error. Relevant code: #import "MyApplication.h" #import "StaticLib.h" NSData* getAllData() { NSLog(@"myGetAllData"); return nil; } @implementation MyApplication ... @end I've looked into Apple's runtime library but that all seems to be class-oriented. Any suggestions or is it just not possible to override global functions from static libraries?

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• Best platform for android and ios game?

  - by LoveMeSomeCode

  Ok, this has been asked before, but not recently, and most of the answers were just 'buy a mac'. So we're a couple guys who've been making small flash games, and now we want to go mobile, and there seem to be lots of options. Does anyone here have experience with one or more of these platforms to tell us the pros and cons of each? Corona AIR 3 Rhodes Could someone with experience compare and contrast these to each other and native development? We want to cast the widest net with the least re-work so we'd like to target just Android and iPhone, and we'd like it to be an actual app in the market instead of just a mobile website. We have experience in Actionscript, Javascript, and C#.

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• 3D open source physics engine suitable for mobile platforms (Android and iOS)

  - by lukeluke

  I have made some research and found that bullet, ode, newton and some others are open source physics engines that should be portable enough (but I have never tried to comile/use anyone of them on phones). I am writing my games for mobile platforms in C++, so the engine should be C or C++. I need a fast engine, since mobile platforms have limited resources. I need a free engine. A good design would be nice to have too. What engine is best suited for my task? What I really would like to hear from you is your direct experience. Documentation and support (for example, forum or an IRC channel) is a really important aspect to take into consideration.

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• Is there an AIR native extension to use GameCenter APIs for turn-based games?

  - by Phil

  I'm planning a turn based game using the iOS 5 GameCenter (GameKit) turn-based functions. Ideally I would program the game with AIR (I'm a Flash dev), but so far I can't seem to find any already available native extension that offers that (only basic GameCenter functions), so my questions are: Does anyone know if that already exists? And secondly how complex a task would it be to create an extension that does that? Are there any pitfalls I should be aware of etc.? ** UPDATE ** There does not seem a solution to the above from Adobe. For anyone who is interested check out the Adobe Gaming SDK. It contains a Game Center ANE which I've read contains options for multiplayer but not turn-based multiplayer, at least it's a start. Comes a bit late for me as I've already learned Obj-c!

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• Threading iPhone

  - by bobobobo

  Say I have a group of large meshes that I have to intersect rays against. Assume also, for whatever reason, I cannot further simplify/reduce poly check count by spatial subdivisioning. I can do this in parallel: bool intersects( list of meshes ) // a mesh is a group of triangles { create n threads foreach mesh in meshes assign to a thread in threads wait until ( threads.run() ) ; // run asynchronously // when they're all done // pull out intersected triangles // from per-thread context data } Can you do this in ios for games? Or is the overhead of thread creation and mutex waiting going to beat-out the benefit of multithreading?

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• Writing a basic shader for large input files

  - by Zoltan Varadi

  I started writing a shader for my iOS app and instead of starting from scratch i used this tutorial here: http://www.raywenderlich.com/3664/opengl-es-2-0-for-iphone-tutorial I wrote an import function, first to import wavefront .obj models. My problem is that with I can't handle larger inputs (with a simple cube it was working). I realized that the indices array is an array of GLubyte values, which is unsigned char, so as a result i cant have more than 256 indexes. I modified it to GLuint, but then only get a blank screen. What else needs to me modified? p.s.: the source can be downloaded from here: http://d1xzuxjlafny7l.cloudfront.net/downloads/HelloOpenGL.zip

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• Book suggestions for GUI related topics [closed]

  - by asrijaal

  In the past, I've developed more on the server side, so no big GUI/graphic programming topics have crossed my way so far. I'm switching a little bit to the mobile plattforms (iOS, android) and would like to gather more info on the visual/graphic side. Using the SDK controls/widgets isn't that challenging and I would love to get deeper into the view/presentation layer. Animations, drawing itself, probably OpenGL. Any books that would take me a little deeper in understanding how drawing actually works would be helpful.

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• Cocos-2D asteroids style movement (iOS)

  - by bwheeler96

  So I have a CCSprite subclass, well call this Spaceship. Spaceship needs to move on a loop, until I say othersise by calling a method. The method should look something like - (void)moveForeverAtVelocity { // method logic } The class Spaceship has two relevant iVars, resetPosition and targetPosition, the target is where we are headed, the reset is where we set to when we've hit our target. If they are both off-screen this creates a permanent looping effect. So for the logic, I have tried several things, such as CCMoveTo *move = [CCMoveTo actionWithDuration:2 position:ccp(100, 100)]; CCCallBlockN *repeat = [CCCallBlockN actionWithBlock: ^(CCNode *node) { [self moveForeverAtVelocity]; }]; [self runAction:[CCSequence actions: move, repeat, nil]]; self.position = self.resetPosition; recursively calling the moveForeverAtVelocity method. This is psuedo-code, so its not perfect. I have hard-coded some of the values for the sake of simplicity. Enough garble: The problem I am having, how can I make a method that loops forever, but can be called and reset at will. I'm running into issues with creating multiple instances of this method. If you can offer any assistance with creating this effect, that would be appreciated.

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• Should I be using a game engine?

  - by Kyle

  I'm an experienced programmer, but I'm completely new to making games. I'm thinking of making an iPhone game that is similar to a 2d tower defense type game. In the web programming world, it would be a big waste of time to make a website without using some sort of web framework (eg ruby on rails). Is that the same for making games? Do people mostly use some sort of framework/game engine for making a game? If so, what are the popular ones for iOS?

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• iOS 6 disponible avec plus de 200 nouveautés, OS X Mountain Lion téléchargeable sur le Mac App Store

  iOS 6 Beta 2 disponible pour les développeurs plus stable avec quelques nouveautés pour Siri Mise à jour du 26/06/2012, par Hinault Romaric Apple vient de publier la seconde Beta d'iOS 6. Présenté lors de la conférence annuelle des développeurs de la société (WWDC), iOS 6 apportera pas moins de 200 nouveautés parmi lesquelles des améliorations pour les applications Siri, Facetime, etc. (lire ci-devant). Annoncé en version finale pour l'automne, iOS 6 sera précédé de plusieurs betas. Pour iOS 5 par exemple, la firme avait publié sept Betas avant la sortie de la version stable. Ainsi, deux semaines ...

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• Which is better? Native App or hybrid App?

  - by Prabakaran

  I want to develop a simple App for iOS, Android and windows phone. I just wondered that a simple HTML5, JS and CSS combination can work in all of these platforms. I want to know which one will be efficient? No problem with time and coding. But if i can achieve everything with HTML5-JS itself, i will chose Hybrid development. I want to know the major difference between the Native and Hybrid Development with example(I know that the main difference is HTML5-JS supports cross platform). Note : I am not making a game app.

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• Best advice for game programmer who wants to go indie?

  - by JStriedinger

  So. I'm working right now as an intern in a mobile game development company. I've used Unity quite a lot for 1 year now but, that's about all the experience I have with game design/development. Here's the things. I wanna go indie, the main reason is for fun, I really enjoy games and by making indie games I believe I can let my imagination fly and make personal personal stuff. Unfortunately I...I just don't know where to start! I'm interestes in making mobile and web games so what...should I download Stencyl? Construct 2?...XCODE for iOS, maybe a great plugin for Unity would be fine? What whould be your single best advice for someone like me? (programmer and interestes in design) :)

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• Clarification for setting up SSH terminal access on Cisco IOS

  - by Matt Malesky

  I'm attempting to set up SSH on a Cisco 2811 and having some difficulties. The first step to this should be running crypto key generate rsa I seem to be missing this though: better#crypto key generate rsa ^ % Invalid input detected at '^' marker. better# Furthermore, the only available commands I have in the crypto key namespace are lock and unlock, which seem to indicate a locked keypair (for which I don't know the password): better#crypto key ? lock Lock a keypair. unlock Unlock a keypair. better#crypto key unlock ? rsa RSA keys better#crypto key unlock rsa %% Please enter the passphrase: %% Unlocking failed. . better# More or less, I'm asking what exactly this might mean, and if I actually do have certificates already here (used router)? Otherwise, how can I solve this? It's my first time configuring this feature, but I definitely believe it's part of my IOS. Speaking of my IOS, I'm running the image c2800nm-advsecurityk9-mz.124-24.T6.bin I'll also note that I have my hostname and ip domain-name configured. I'll also give you a dir flash: below if it's at all of use: better#dir flash: Directory of flash:/ 2 -rw- 2748 Jul 27 2009 14:03:52 +00:00 sdmconfig-2811.cfg 3 -rw- 931840 Jul 27 2009 14:04:10 +00:00 es.tar 4 -rw- 1505280 Jul 27 2009 14:04:32 +00:00 common.tar 5 -rw- 1038 Jul 27 2009 14:04:46 +00:00 home.shtml 6 -rw- 112640 Jul 27 2009 14:05:00 +00:00 home.tar 7 -rw- 1697952 Jul 27 2009 14:05:26 +00:00 securedesktop-ios-3.1.1.45-k9.pkg 8 -rw- 415956 Jul 27 2009 14:05:46 +00:00 sslclient-win-1.1.4.176.pkg 9 -rw- 38732900 Dec 8 2011 06:28:56 +00:00 c2800nm-advsecurityk9-mz.124-24.T6.bin 64016384 bytes total (20598784 bytes free) better#

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• iOS: AVQueuePlayer/AVPlayerItem 'An AVPlayerItem can occupy only one position in a player's queue at a time.'

  - by JoshDG

  I keep getting this error: 'An AVPlayerItem can occupy only one position in a player's queue at a time.' I NSLog'd the players items, and none of them seem to be equal. Further, I added this just to be sure: if([player canInsertItem:itemToAdd afterItem:nil]) [player insertItem:itemToAdd afterItem:nil]; When I wasn't sure if that would work (can have two identical items in different memory locations) I wrote a category method to test if a player contains an item or something identical to it. Yet, I'm still getting the error. I've seen several posts of people getting this error with MPMoviePlayerController, but I'm not using that custom class, just the out of the box AVQueuePlayer. Any ideas on how to fix this?

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• What library is used for the main menu in the facebook iOS app?

  - by Seth

  I'm making an app that has more options than will easily fit into a UITabBarController. I wanted to use something like what the facebook app has for its main menu. My guess is that it isn't proprietary to facebook, because the SCVNGR app uses something similar. This library lets you re-order the icons the way you can re-order the apps from the main menu (i.e. press and hold - icons jiggle - you can drag them around). Does anyone know what library provides this UIView? I'd like to use it if possible. Thanks!

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• using iOS 7 status bar in adobe air 4.11

  - by AlexGo

  I am developing an ios app using flex SDK 4.11 from Apache and I encountered a problem regarding iOS status bar. The problem is that even when the app is not in full scree the iOS status bar is displaying over my app. Is there a way to show my app below the status bar without moving the content of my app below the status bar by first determining the status bar height and then set the content below ?

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• How stable are Cisco IOS OIDs for querying data with SNMP across different model devices?

  - by Daniel Papasian

  I'm querying a bunch of information from cisco switches using SNMP. For instance, I'm pulling information on neighbors detected using CDP by doing an snmpwalk on .1.3.6.1.4.1.9.9.23 Can I use this OID across different cisco models? What pitfalls should I be aware of? To me, I'm a little uneasy about using numeric OIDs - it seems like I should be using a MIB database or something and using the named OIDs, in order to gain cross-device compatibility, but perhaps I'm just imagining the need for that.

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• 2D distortion of a face from an image on iOS? (similar to Fat Booth etc.)

  - by Dominik Hadl

  I was just wondering if someone knows about some good library or tutorial on how to achieve a 2D distortion of a face taken from an image taken by the user. I would like to achieve a similar effect to the one in Fatify, Oldify, all those Fat Booths, etc., because I am creating an app where you will throw something at the face and I would the face to jiggle and move when the object hits it. How should I do this?

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• HTML5 video tag with multiple bitrate videos?

  - by Joanne

  I have MP4 video files encoding at different bitrate to be compatible for both iOS on Wifi and Edge connection. I would like to have them progressive loaded form my website using HTML5 video tag. video_big.mp4 encoded for iOS on Wifi H.264 Baseline, 25fps, 640x480, 500kbps video_small.mp4 encoded for iOS on Edge/3G H.264 Baseline, 25fps, 320x240, 56kbps My question is: How can I write the HTML5 video tag to serve video_big.mp4 to iOS devices that connected through Wifi, and serve video_small.mp4 to iOS devices that connected through Edge/3G? I'm running on PHP/Apache server. Thank you :)

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• how to search values in a dictionary that is assigned to a key for a PFObject without downloading all PFObjects of that class (iOS/Parse)

  - by mkc842

  Suppose I have a set of PFObjects (essentially dictionaries) of class "myObject". Objects of this class contain for key "myDictionary" a dictionary. "myDictionary", in turn, has a key "myKey" that I want to access and search for matches against "mySearchTerm". I don't want to download all myObject objects and then iterate through them to check myKey in each, because that would be very inefficient. I want to use a findObjects message to return just the matches. Is such a query possible? In other words, how can I search the values in a dictionary that is assigned to a key for a PFObject without downloading all PFObjects of that class? Here's what it might look like if there were a simple method for it, but I made up the containsKey part to clarify what I am contemplating: PFQuery *objectQuery = [PFQuery queryWithClassName:@"myObject"]; [objectQuery whereKey:@"myDictionary" ~containsKey~:@"myKey" equalTo:"mySearchTerm"];

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• Another developer revoked and re-created my client's iOS Distribution Certificate - does this mean I can never update my client's existing app?

  - by Schnapple

  Here is the story so far: A client hired us to do an iPhone app for them. This client had never done an iPhone app before and as part of the arrangement we handled all aspects for them, including app store submission, and we handle some level of future development (new features, bug/security fixes, etc.) We created a Distribution certificate and key pair on the client's behalf We developed the app, published it to the App Store without incident Some time later the client hired a second developer to do a different app for them This second developer, it appears, has revoked the existing Distribution certificate and created a new one with a new key pair on their system This second developer shared the new Distribution certificate and key pair with us for future reference. Due to user error, this new certificate and key pair has now been imported onto the Macintosh where the original certificate and key pair for the original app we developed were created and the originals were not backed up. So we have App #1 on the App Store with Distribution certificate/key pair #1 App #2 either on the App Store or soon to be using Distribution certificate/key pair #2 Distribution certificate/key pair #1 appears to be lost now So my question is: if we ever need to update App #1, will we be able to, using Distribution certificate/key pair #2? Or will we have to upload it as a new app?

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