How to Remove Unused Parameter Warning - part 2

I still believe in no-warnings coding policy. Old problem, new solution.

Code warnings are often signs of real problems and have to be checked each and all. Many times you can rewrite the code in a better way, but sometimes that's not possible. For example generic protocol API offers method parameters, which are not needed in certain cases. You get the "Unused Parameter" warning.

What to do?

Icon dimensions (0x0) don't meet the the size requirements

Got a weird warning while validating my FontType 1.1 update at the weekend:

iPhone/iPod Touch: Icon dimensions (0x0) don't meet the the size requirements. The icon file must be 57x57 pixels, in .png format

Icon was just fine, so it's unclear what this means. However there are two theories: a) latest Apple iOS update messed up something or b) Apple iTunes Connect server has some issues.

Application Validation Problems

Tried all weekend to make a release, these were the last issues to be solved:

warning: Icon specified in the Info.plist not found under the top level app wrapper: Icon-SMall@2x.png (-19007)

declaration of 'struct sockaddr_in' will not be visible outside of this function

Everybody and their mom has own modified Reachability code and none are compatible. Yet another fix to the "default" code, in case you see this kind of warning or error (no-warnings policy):

Reachability.h: error: declaration of 'struct sockaddr_in' will not be visible outside of this function [-Werror,3]

Fix is easy, just add this:

#import <netinet/in.h>

Hope Apple would pull together all "fixes" and update the Reachability master version for all of us.

How to Clear Project Build Results

You have a project with several targets, of which at least one fails. You can see this at Xcode4 iTunes-styled toolbar info window at top.

Except that The Target that you just build was just fine. No warnings, no errors. Xcode4 still tells something went wrong!

Request for member 'item' in something not a structure or union

There are several ways how you can get this compiler error - and here's another one. With one way to fix it.

First setup everything:

@interface MyPlayer : MPMoviePlayerViewController
{
UIView *parentView;
}
@property (nonatomic, retain) UIView *parentView;
@end

@interface MyView : UIView
{
MyPlayer *myPlayer;
}
@end

This doesn't work, compiler error:

self.myPlayer = [[MyPlayer alloc] init];
self.myPlayer.parentView = self;

This is ok:

MyPlayer *player = [[MyPlayer alloc] init];
player.parentView = self;
self.myPlayer = player;
[player release];

Divide and conquer... If this didn't help you, remember to check that you import correct header files.

Can't Start Debugger. CFSocketSetAddress Returns Error -1

Was debugging an application in real device, when suddenly got an error note about failed network connection. Since this happened before application launch, I got curious.

Why would debugging application in device fail due network error before launch? Why would it fail now, when everything was ok dozens of times just beforehands (yes, I do a lot of quick but short debugging sessions in real device)?

Stray '/302' in program

Much of writing code is pretty automated, I don't usually even consciously recognize what I do.

Too busy thinking about the problem, possible solution(s) and side-effects. Build or Build-and-Analyze is a good way to take a few seconds to think about what's next on the list - and then it happens. Compiler error!

Warning: Unable to read symbols for /Developer/Platforms/iPhoneOS.platform

Got mysterious warnings, while trying to debug an application in iPhone device. Used to work, but suddenly not any more! The only difference I can think of is that I'm using Facebook iOS SDK for the first time.

Data Formatters temporarily unavailable, will re-try after a continue

Mysterious crash happens, when I'm trying to display about 65MB image in iPhone4. Wonder what could be the problem... (hint: trying to display 65 MEGABYTE image file):

Program received signal:  “0”.
Data Formatters temporarily unavailable, will re-try after a 'continue'. (Unknown error loading shared library "/Developer/usr/lib/libXcodeDebuggerSupport.dylib")

Code Sign error: Provisioning profile can't be found

Check what is Info.plist Bundle Identifier, go to Apple iOS provision portal and download related App ID provision file and install. Note that if you're not Team Admin, you have to ask someone else to download the file for you.

Actual error code shows also cryptic mobileprovision id, but that won't help you much:

Code Sign error: Provisioning profile '123456F8-1234-1234-ABCD-ABCDEFGH1234' can't be found

The executable was signed with invalid entitlements (install)

This is not the error with EXACTLY same error note you get during ad hoc release creation in Xcode (see here). This one comes, when you try to install that "successfully" created ad hoc release into device.

OPEN, no idea what went wrong or how to fix. Yet.

Team Provisioning Profile - Invalid. Renew button disabled

Team Provisioning Profile - Invalid. Renew button disabled.

Open Xcode Organizer, find Team profile and press Renew button. Automatically downloads Team Provisioning Profile, but only for apps with * App ID.

Everything That Can Go Wrong With Xcode Build and Release

Right now I'm in the middle of serious mess up of my Xcode development environment, can't create ad hoc builds. No idea what triggered it, thus no idea what or how to fix. Since same error notes keep popping up time after time, I start documenting each. Maybe I'll slowly gather enough info to fix something.

Xcode error notes:

• The executable was signed with invalid entitlements (Xcode)
• The executable was signed with invalid entitlements (install) OPEN
• Command /usr/bin/codesign failed with exit code 1
• Build & Archive - Share Application - nothing happens
• Build & Archive - Share Application - unable to find user OPEN
  
• Build & Archive - Share Application - Email - missing plugin OPEN
  
• Team Provisioning Profile - Invalid. Renew button disabled.
• Code Sign error: The identity 'iPhone Developer' doesn't match any identity in any profile
• Code Sign error: Provisioning profile can't be found

Useful articles:

• Apple Technical Note TN2242: Resolving "0xE800003A", applications not launching and "missing entitlement"
• Cocoanetics: A signing identity matching this profile could not be found in your keychain
  

Useful sites:

• Apple Developer Forums
• Stack overflow

Have patience, try again, just keep bumbing your head into wall, no pain no gain, good luck, it works for me, wave the rubber chicken above monitor... yep, I know: none of it helps.

You have sympathy. It won't help either.

Command /usr/bin/codesign failed with exit code 1

Select your project root in Xcode, command-i for Info, go to Configurations tab, delete old "Ad Hoc" configuration, duplicate Release and rename as "Ad Hoc". Rebuild and i installs and runs on connected device.

Problem might have been due space in name (even when it used to work earlier).

The executable was signed with invalid entitlements

Try to create ad hoc release in Xcode, got error note:

The executable was signed with invalid entitlements.

The entitlements specified in your application's Code Signing Entitlements file do not matchc those specified in your provisioning profile (0xE8008016). [OK]

Case 1: Go to Provisioning Portal - Provisioning - Distribution, find your project Distribution Provisioning Profile, Edit - Modify (do whatever and revert if everything already is right) - Submit - Download and double-click the file at your dev machine. Clean and rebuild.

Case 2: make sure you have Entitlements.plist file in your project, containing just one prorerty called get-task-allow". This has to be off. Add name of this file into your project ad hoc release Code Signing Entitlements.

How to Undo Past Last Point

This is one of those things you do only once, thus easily forgotten. Did it for "my" machine, but now I'm a contractor using customer machine.

So how do I get rid of this annoying warning note, when I want to undo after saving a file:

You are about to undo past the last point this file was saved. Do you want to do this?

Open Terminal window and type:

defaults write com.apple.Xcode XCShowUndoPastSaveWarning NO

Restart Xcode and you're fine. Until next machine.