Apple's default way of describing collections seriously blows. JSON is better.

CBJSONCollectionDescriptions.m

//
//  CBJSONCollectionDescriptions.m
//  Chartboost
//
//  Created by Kenneth Ballenegger on 3/12/14.
//
//

#import "CBJSONCollectionDescriptions.h"
#import <objc/runtime.h>





@interface NSArray (CBJSONCollectionDescriptions)
- (NSString *)CBJSONCollectionDescriptions_descriptionWithLocale:(id)locale;
@end

@interface NSDictionary (CBJSONCollectionDescriptions)
- (NSString *)CBJSONCollectionDescriptions_descriptionWithLocale:(id)locale;
@end


void CBJSONCollectionDescriptionsSwizzle(void) {
    // TODO: macro disables this?
    Method originalD, swizzledD, originalA, swizzledA;
    
    originalD = class_getInstanceMethod([NSDictionary class], @selector(descriptionWithLocale:));
    swizzledD = class_getInstanceMethod([NSDictionary class], @selector(CBJSONCollectionDescriptions_descriptionWithLocale:));
    method_exchangeImplementations(originalD, swizzledD);

    originalA = class_getInstanceMethod([NSArray class], @selector(descriptionWithLocale:));
    swizzledA = class_getInstanceMethod([NSArray class], @selector(CBJSONCollectionDescriptions_descriptionWithLocale:));
    method_exchangeImplementations(originalA, swizzledA);
}

NSString *CBJSONCollectionDescriptionsDescriptionForObject(id, id);
NSString *CBJSONCollectionDescriptionsDescriptionForObject(id obj, id locale) {
    if (![NSJSONSerialization isValidJSONObject:obj]) {
        return [obj CBJSONCollectionDescriptions_descriptionWithLocale:locale];
    } else {
        NSData *d = [NSJSONSerialization dataWithJSONObject:obj options:NSJSONWritingPrettyPrinted error:NULL];
        return [[[NSString alloc] initWithData:d encoding:NSUTF8StringEncoding] autorelease];
    }
}


@implementation NSArray (CBJSONCollectionDescriptions)

- (NSString *)CBJSONCollectionDescriptions_descriptionWithLocale:(id)locale {
    return CBJSONCollectionDescriptionsDescriptionForObject(self, locale);
}

@end


@implementation NSDictionary (CBJSONCollectionDescriptions)

- (NSString *)CBJSONCollectionDescriptions_descriptionWithLocale:(id)locale {
    return CBJSONCollectionDescriptionsDescriptionForObject(self, locale);
}

@end