carlj/CJAInvocationFilter

The category adapts the before and after filter concept from Rails

#CJAInvocationFilter The category adapts the before and after filter concept from Rails.

##Installation Just drag & drop the NSObject+InvocationFilter.h and NSObject+InvocationFilter.m to your project.

##Example First of all take a look at the Example Project

##Usage

//import the category
#import "NSObject+InvocationFilter.h"

//Create or use your custom class
@interface TestObject : NSObject

- (void)doSomething;

@end

@implementation TestObject

- (void)doSomething {
  NSLog(@"%s", __FUNCTION__);
}

@end

TestObject *object = [TestObject new];

//add the filters to the proxy object
[object setBeforeFilter: ^(NSObject *object){
	NSLog(@"before filter");
}
                       forSelector: @selector(doSomething)];

[object setAfterFilter: ^(NSObject *object){
	NSLog(@"after filter");
}
                      forSelector: @selector(doSomething)];


//call the original method on the proxy
[object doSomething];

##Note You cannot call methods that are implemented in the NSObject Protocol e.g. class, hash, superclass, description and so on.

##LICENSE Released under the MIT LICENSE