I’m working on a new game project that I’m hoping to release sometime in the next month or so! I’m taking a break from Dynamite to do something a bit more wacky \ud83d\ude42 For these posts I’m going to be referring to my project as “mygame” since I’m not ready to announce the name of this super-amazing project yet.<\/p>\n
Anyway, I downloaded Xcode 4.0.2 the other day so I could get going with the latest iOS tools. I’m going to be using more iOS features in this game than ever before, so I want to be sure I’m up to date with how things are supposed to be done. Xcode, however, has quite a few changes, so here’s the documentation of some of the common things I do as an Xcode user that changed.<\/p>\n
1. Adding CFLAGS to my project “-DMYGAME_IOS_BUILD, etc”<\/strong><\/p>\n – Click on “mygame” at the top left of the project tree hierarchy. From there you can find the “Other C Flags” setting. Apparently Xcode 4 has “Schemes” (the name of your project) as well as “Builds” (Debug \/ Release) as well as “Destinations” (iPhone \/ iPad \/ Simulator).<\/p>\n 2. Adding more Frameworks to the project<\/strong><\/p>\n I always have a handful of frameworks I need to add. In Xcode 3, you could right-click and click on “Add Existing Frameworks” to pick from a list. This is no longer the case. But doing the same is pretty easy:<\/p>\n – Expand the “Frameworks” from the project tree. 3. Working with the new OpenGLES iOS template<\/strong><\/p>\n Every few releases of Xcode, Apple changes up the OpenGLES template. I do wonder if I should just copy over it with my own stuff? Maybe, but I figure Apple knows best or whatever, and I always adapt to the latest template for new projects. This one has me a bit more confused than usual since it seems to use more Interface Builder type stuff and has a mygameViewController object in it as well (and corresponding .m and .h files.)<\/p>\n – At this point I knew since I was going to be using GameCenter and IAP in this game I might as well learn a bit more ObjectiveC. I’ve thus far managed to NOT learn it in the 3 years of iOS coding I’ve been doing. So, to kick things off I figured I’d check out what the iOS development videos<\/a> might have for me. Unfortunately, the newest videos are from Apple’s 2009 tour. Kind of sad, I mean, 2009 was back before iPads even existed. So those videos are certainly not going to help me deal with the new fancy in Xcode 4 and building Universal apps.<\/p>\n – Instead I found that the typed documentation<\/a> was much more helpful. I clicked into “Tools for iOS Development” to see what they’d have to say about Xcode 4.<\/p>\n – From perusing a few documents I got the feeling that to use GameCenter, etc, I was going to need a ViewController. Since the new OpenGLES template includes one, I guess that is good. If there are any iOS devs reading this who want to point me towards some helpful tutorials so I can understand what I’m doing better, that would be great. As-is, I am sort of continuing in my usual blind-cut-and-paste-and-hope type stupor with this stuff.<\/p>\n – I hacked out all the GLES2 code, I still write all my code using GLES1 .. the advantage that gives me is that my code will work simply on pretty much any platform. And I finally after 3 years understand GLES1 pretty well. I suppose I might get into ES2 eventually, but not yet \ud83d\ude42 I also like that GLES1 code can work on the desktop with almost no changes. I hear shaders can add complication to my life on the desktop. Again, if anyone wants to link me to useful commentary on that, I wouldn’t mind!<\/p>\n 4. Hacking my game onto the iOS app<\/strong><\/p>\n I always code my games in C\/C++. What I’ve found is the easiest way to get it to work with iOS is to rename all the .m files to .mm so that they are C++ aware ObjectiveC. Then I have a set of wrapper functions for my game that the ObjectiveC code can call.<\/p>\n Okay, so this is really cool, Xcode 4 now detects if you type in an invalid function name, and suggests a replacement function name \ud83d\ude42 And it worked!<\/p>\n 5. Making the game Universal<\/strong><\/p>\n Xcode 4 seems to make this pretty easy. I just went into the Summary tab and switched mygame over to Universal and it all seemed to work pretty well. I only had to add these lines to the top of my drawFrame method in my ViewController:<\/p>\n
\n– Click on the “Build Settings” tab in the main frame.
\n– Click on the “All” button to reveal all settings.<\/p>\n
\n– Right-click on one of the frameworks.
\n– Select “Show in Finder”
\n– Finder will open, and will show the folder where all the frameworks are.
\n– Drag and drop a framework from Finder to the Frameworks in your project<\/p>\n\r\nCGRect screenFrame = [[UIScreen mainScreen] applicationFrame];\r\ngame_resize(screenFrame.size.width,screenFrame.size.height);\r\n<\/pre>\n