src/video/uikit/SDL_uikitview.h
author Sam Lantinga <slouken@libsdl.org>
Tue, 24 Nov 2009 08:12:32 +0000
changeset 3487 24d13328c44a
parent 2859 99210400e8b9
child 3697 f7b03b6838cb
permissions -rw-r--r--
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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/*
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    SDL - Simple DirectMedia Layer
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    Copyright (C) 1997-2009 Sam Lantinga
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    This library is free software; you can redistribute it and/or
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    modify it under the terms of the GNU Lesser General Public
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    License as published by the Free Software Foundation; either
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    version 2.1 of the License, or (at your option) any later version.
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    This library is distributed in the hope that it will be useful,
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    but WITHOUT ANY WARRANTY; without even the implied warranty of
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    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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    Lesser General Public License for more details.
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    You should have received a copy of the GNU Lesser General Public
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    License along with this library; if not, write to the Free Software
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    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
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    Sam Lantinga
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    slouken@libsdl.org
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*/
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#import <UIKit/UIKit.h>
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#include "SDL_stdinc.h"
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#include "SDL_mouse.h"
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#include "SDL_mouse_c.h"
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#include "SDL_events.h"
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#if SDL_IPHONE_MULTIPLE_MICE
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#define MAX_SIMULTANEOUS_TOUCHES 5
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#else
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#define MAX_SIMULTANEOUS_TOUCHES 1
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#endif
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/* *INDENT-OFF* */
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#if SDL_IPHONE_KEYBOARD
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@interface SDL_uikitview : UIView<UITextFieldDelegate> {
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#else
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@interface SDL_uikitview : UIView {
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#endif
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	SDL_Mouse mice[MAX_SIMULTANEOUS_TOUCHES];
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#if SDL_IPHONE_KEYBOARD
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	UITextField *textField;
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	BOOL keyboardVisible;
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#endif	
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}
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- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event;
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- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event;
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- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event;
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#if SDL_IPHONE_KEYBOARD
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- (void)showKeyboard;
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- (void)hideKeyboard;
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- (void)initializeKeyboard;
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@property (readonly) BOOL keyboardVisible;
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#endif 
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@end
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/* *INDENT-ON* */