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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
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slouken committed Nov 24, 2009
1 parent 1f32393 commit 1c12873dce6579325f0e43b126fdb6dc5328423a
Showing with 5 additions and 1 deletion.
  1. +1 −1 include/SDL_config_iphoneos.h
  2. +4 −0 src/video/uikit/SDL_uikitview.h
@@ -141,7 +141,7 @@ typedef unsigned long uintptr_t;
#define SDL_POWER_MACOSX 1

/* enable iPhone keyboard support */
#define SDL_IPHONE_KEYBOARD 1
#define SDL_IPHONE_KEYBOARD 0

/* Enable emulation of multiple mice through multi-touch */
#define SDL_IPHONE_MULTIPLE_MICE 1
@@ -33,7 +33,11 @@
#endif

/* *INDENT-OFF* */
#if SDL_IPHONE_KEYBOARD
@interface SDL_uikitview : UIView<UITextFieldDelegate> {
#else
@interface SDL_uikitview : UIView {
#endif

SDL_Mouse mice[MAX_SIMULTANEOUS_TOUCHES];

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