Comments on: Targeting 2.x With 3.0 Features. Trouble Ahead.

By: Mike

Mike — Mon, 31 Aug 2009 09:38:08 +0000

I ran into exactly this problem of debugging in 2.2 with the simulator. As mentioned above, you can attach to the process (i just used ‘ps -x | grep -i appname’). i had to add a sleep when my app initialises as the crash was coming within the first second. hardly an ideal solution, but hey.

turns out my problem was i subclassed UIButton and while it all works fine under 3.0, 2.x didn’t like it one bit. as soon as the derived button was added to a view it would crash. (no doubt i will now discover that it is well known one shouldn’t subclass UIButton ).

@edgard – you can’t launch the mail app in the simulator (it doesn’t exist), so the mailcomposer example will only work in 2.x on a device.

By: Edgard Rodriguez

Edgard Rodriguez — Fri, 14 Aug 2009 10:08:09 +0000

I follow your steps but the button send do nothing in 2.2.1 is like doesn’t have the method to show the ComposerEmail. but in 3.0 works fine.

any help

thanks

- (void)email { //Can send email //if ([MFMailComposeViewController canSendMail]) Class mailClass = (NSClassFromString(@"MFMailComposeViewController")); if (mailClass != nil && [mailClass canSendMail]) { // the custom icon button was clicked, handle it here MFMailComposeViewController *controller = [[MFMailComposeViewController alloc] init]; controller.mailComposeDelegate = self; [controller setSubject:@"In app email..."]; [controller setMessageBody:@"...a tutorial from mobileorchard.com" isHTML:NO]; [self presentModalViewController:controller animated:YES]; [controller release]; }


	/*

	// Attach an image to the email

	NSString *path = [[NSBundle mainBundle] pathForResource:@"Images" ofType:@"plist"];

    NSData *myData = [NSData dataWithContentsOfFile:path];

	[controller addAttachmentData:myData mimeType:@"image/png" fileName:@"rainy"];

	 */

} - (void)mailComposeController:(MFMailComposeViewController*)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError*)error { [self becomeFirstResponder]; [self dismissModalViewControllerAnimated:YES]; }

By: Eknath

Eknath — Mon, 03 Aug 2009 18:31:59 +0000

Guess what, I forgot to put the weak link flag for 3.0 frameworks. And shipped the app. My 2.1 users started shouting as the app would crash just after launching. It was a disastrous situation.

By: links for 2009-08-01 « Blarney Fellow

links for 2009-08-01 « Blarney Fellow — Sun, 02 Aug 2009 01:06:39 +0000

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By: Noel

Noel — Sat, 01 Aug 2009 07:43:37 +0000

I did try attaching the debugger, but the app didn’t show up in the list, like you mentioned. I’ll try finding the PID and attaching directly and see if that works. Thanks.

By: Frank Szczerba

Frank Szczerba — Fri, 31 Jul 2009 21:28:45 +0000

Have you tried launching the app in the 2.2 simulator then connecting to the running instance with the debugger? Just go to Run -> Attach to Process in XCode. If your app doesn’t show in the list, find the PID with ps or Activity Monitor and pick the Process ID… option. XCode will attach (and pause) the process, allowing you to set any breakpoints you need and then continue.