This code doesn’t involve compiler flags or direct runtime calls:

SEL selector = @selector(zeroArgumentMethod);
NSMethodSignature *methodSig = [[self class] instanceMethodSignatureForSelector:selector];
NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:methodSig];
[invocation setSelector:selector];
[invocation setTarget:self];
[invocation invoke];

ResourceNSInvocation allows multiple arguments to be set so unlike performSelector this will work on any method.

And tip:

#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Warc-performSelector-leaks"
    [self.ticketTarget performSelector: self.ticketAction withObject: self];
#pragma clang diagnostic pop

In this tutorial, I am going to demonstrate how you can zip and unzip files from within your iOS applications. We will be using a third party library called ZipArchive to achieve this. While there are a couple solutions out there to zip and unzip files, I feel that the ZipArchive library was the fastest and easiest way to get up and running.

(more...)

Finally, Apple introduced native Git support in Xcode 4. Git is now the standard version control system you can use within Xcode. The Apple engineers did a great job in integrating Git into Xcode 4 … but there is room for improvements  Tools like gitx still are essential for me to keep track of all the branches in the Git-repository.

# Exclude the build directory
build/*

# Exclude temp nibs and swap files
*~.nib
*.swp

# Exclude OS X folder attributes
.DS_Store

# Exclude user-specific XCode 3 and 4 files
*.mode1
*.mode1v3
*.mode2v3
*.perspective
*.perspectivev3
*.pbxuser
*.xcworkspace
*.xcuserstate
xcuserdata

one can also specify a global gitignore file in ~/.gitconfig:

[core]
excludesfile = /Users/username/.gitignore