MYSCategoryProperties

Quickly add properties to categories using runtime associations. Property names must follow the 3 letter prefix (e.g. mys_property) category naming convention in order for this to work.

Installation

In your Podfile, add this line:

pod "MYSCategoryProperties"

Instructions

Add properties to your header file:

@interface NSString (Example) 
@property (nonatomic, copy  ) NSDate    *mys_typedAt;
@property (nonatomic, assign) NSInteger mys_firstSpaceIndex;
@end

Import the header:

#import <MYSCategoryProperties.h>

Add @dynamic for each property in your implementation file:

@implementation NSString (Example)
@dynamic mys_typedAt;
@dynamic mys_firstSpaceIndex;
...

Call this method in + (void)load (which is called on each category of a class):

+ (void)load
{
    [MYSCategoryProperties setup:self];
}

And that's it!

You can now use the properties like normal:

NSString *string = @"A string";
string.mys_typedAt = [NSDate date];
string.mys_firstSpaceIndex = 1;

NSLog(@"A string: \"%@\" that was typed at %@ has a space at %d", string, string.mys_typedAt, string.mys_firstSpaceIndex);

Contributing

Please update and run the tests before submitting a pull request. Thanks.

Credit

Much inspiration and code taken from https://github.com/gangverk/GVUserDefaults

Author

Adam Kirk (@atomkirk)