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Eric Wing to Sam, hfutrell This one is quite puzzling. I found a partial workaround, but I don't fully understand the reasons yet. First, the console is complaining about not finding a nib for MainWindow. I tried removing the entry for this in the info.plist, and the message went away, but it didn't really change anything. Second, I stepped through this with the debugger and broke up some lines. It seems that the basic act of calling view = [SDL_uikitopenglview alloc]; or even view = [SDL_uikitview alloc] will crash the program. The debugger messages plus the stack trace make me think it's not finding the SDL_uikitview classes for some reason. But I don't understand why this would be. view = [UIView alloc] will not crash the program. For kicks, I added a new definition of a class called SDL_object which subclasses NSObject in the same files as SDL_uikitopenglview and then call view = [SDL_object alloc]; This does not crash the program. So, then I modified SDL_object to subclass UIView. No crash. Next, I made SDL_object subclass UIView<UITextFieldDelegate> . This crashes. So it is the act of conforming to the UITextFieldDelegate protocol that is crashing things. I don't understand why it would crash on alloc though. I'm guessing either a delegate needs to be set somewhere or one of the required methods needs to be implemented. But in the former case, I would not expect a crash, but a silent message to nil and something else doesn't work. And in the latter case, I would expect a compiler warning and an exception thrown instead of a crash. Anyway, my temporary workaround is to change the interface declaration for SDL_uikitview to look like: #if SDL_IPHONE_KEYBOARD @interface SDL_uikitview : UIView<UITextFieldDelegate> { #else @interface SDL_uikitview : UIView { #endif And then disable the keyboard support in the SDL_config_iphoneos.h file. /* enable iPhone keyboard support */ #define SDL_IPHONE_KEYBOARD 0 -Eric On Nov 23, 2009, at 1:43 AM, Sam Lantinga wrote: > I ran into a blocking startup crash with the Happy demo on iPhone OS 3.1.2 on my new iPhone: > > #0 0x323fea14 in _class_isInitialized > #1 0x323fea68 in _class_initialize > #2 0x32403e92 in prepareForMethodLookup > #3 0x32401244 in lookUpMethod > #4 0x323fea10 in _class_lookupMethodAndLoadCache > #5 0x323fe746 in objc_msgSend_uncached > #6 0x323feb26 in _class_initialize > #7 0x323fea58 in _class_initialize > #8 0x32403e92 in prepareForMethodLookup > #9 0x32401244 in lookUpMethod > #10 0x323fea10 in _class_lookupMethodAndLoadCache > #11 0x323fe746 in objc_msgSend_uncached > #12 0x000554dc in UIKit_GL_CreateContext at SDL_uikitopengles.m:103 > #13 0x0004f89e in SDL_GL_CreateContext at SDL_video.c:3155 > #14 0x000579e8 in GLES_CreateRenderer at SDL_renderer_gles.c:282 > #15 0x0004d7b8 in SDL_CreateRenderer at SDL_video.c:1509 > #16 0x00002bc2 in SDL_main at happy.c:156 > #17 0x000571b2 in -[SDLUIKitDelegate postFinishLaunch] at > SDL_uikitappdelegate.m:77 > #18 0x313f9ef2 in __NSFireDelayedPerform > #19 0x32567bb2 in CFRunLoopRunSpecific > #20 0x3256735c in CFRunLoopRunInMode > #21 0x32912cbe in GSEventRunModal > #22 0x32912d6a in GSEventRun > #23 0x32b6276e in -[UIApplication _run] > #24 0x32b61472 in UIApplicationMain > #25 0x00057088 in main at SDL_uikitappdelegate.m:50 > > Any ideas? > > See ya! > -- > -Sam Lantinga, Founder and President, Galaxy Gameworks LLC
author Sam Lantinga <slouken@libsdl.org>
date Tue, 24 Nov 2009 08:12:32 +0000
parents 20326ba2bda2
children
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==============================================================================
About the iPhone OS Demo Applications
==============================================================================

DemosiPhoneOS.xcodeproj contains several targets for iPhone oriented SDL demos.  These demos are written strictly using SDL 1.3 calls.  All the demos except for Fireworks (which requires OpenGL ES) should work on platforms other than iPhone OS, though you'll need to write your own compile script.  To run them on your favorite platform, you may wish to set the macros SCREEN_WIDTH and SCREEN_HEIGHT, located in common.h.

Common files:

	common.c and common.h contain code common to all demo applications.  This includes macros about the screen dimensions (in pixels), simple error handling, and functions for generating random numbers.

Rectangles (rectangles.c):

	Draws randomly sized and colored rectangles all over the screen by using SDL_RenderFill.  This is the simplest of all the demos.

Happy (happy.c):

	Loads the classic happy-face bitmap and draws a large number of happy faces bouncing around the screen.  Shows how you can load a bitmap into an SDL_Texture.

Accelerometer (accelerometer.c):

	Uses the iPhone's accelerometer as a joystick device to move a spaceship around the screen.  Note the use of the macro SDL_IPHONE_MAX_GFORCE (normally defined in SDL_config_iphoneos.h) which converts between the Sint16 number returned by SDL_JoystickGetAxis, and the floating point units of g-force reported natively by the iPhone. 

Touch (touch.c):

	Acts as a finger-paint type program.  Demonstrates how you can use SDL mouse input to accept touch input from the iPhone.  If SDL for iPhone is compiled with multitouch as multiple mouse emulation (SDL_IPHONE_MULTIPLE_MICE in SDL_config_iphoneos.h) then the program will accept multiple finger inputs simultaneously. 

Mixer (mixer.c):

	Displays several rectangular buttons which can be used as a virtual drumkit.  Demonstrates how you can play .wav sounds in SDL and how you can use SDL_MixAudioFormat to build a software mixer that can play multiple sounds at once.

Keyboard (keyboard.c):

	Loads a bitmap font and let's the user type words, numbers, and symbols using the iPhone's virtual keyboard.  The iPhone's onscreen keyboard visibility is toggled when the user taps the screen.  If the user types ':)' a happy face is displayed.  Demonstrates how to use functions added to the iPhone implementation of SDL to toggle keyboard onscreen visibility.

Fireworks (fireworks.c):

	Displays a fireworks show.  When you tap the iPhone's screen, fireworks fly from the bottom of the screen and explode at the point that you tapped.  Demonstrates how you can use SDL on iPhone to build an OpenGL ES based application. Shows you how you can use SDL_LoadBMP to load a bmp image and convert it to an OpenGL ES texture.  Of lesser importance, shows how you can use OpenGL ES point sprites to build an efficient particle system.

==============================================================================
Building and Running the demos
==============================================================================

Before building the demos you must first build SDL as a static library for BOTH the iPhone Simulator and the iPhone itself.  See the iPhone SDL main README file for directions on how to do this.  Once this is done, simply launch XCode, select the target you'd like to build, select the active SDK (simulator or device), and then build and go.