Uses object introspection to print the list of properties and ivars of the instance, together with their current values when possible (i.e. when they are KVC compliant)

gistfile1.txt

- (NSString *)osc_introspectiveDescription
{
    // Loop through our superclasses until we hit NSObject
    NSMutableArray *propertyList = [NSMutableArray array];
    NSMutableArray *ivarList = [NSMutableArray array];
    Class subclass = [self class];

    while (subclass != [NSObject class])
    {
        unsigned int propertyCount;
        objc_property_t *properties = class_copyPropertyList(subclass,&propertyCount);
        for (int i = 0; i < propertyCount; i++)
        {
            // Add property name to array
            objc_property_t property = properties[i];
            const char *propertyName = property_getName(property);
            [propertyList addObject:@(propertyName)];
        }
        free(properties);
                
        unsigned int ivarCount;
        Ivar* ivars = class_copyIvarList(subclass, &ivarCount);
        for (unsigned int i = 0; i < ivarCount; ++i)
        {
            const char *ivarName = ivar_getName(ivars[i]);
            [ivarList addObject:@(ivarName)];
        }
        free(ivars);
        
        subclass = [subclass superclass];
    }

    NSMutableString *propertyDescriptions = [[NSMutableString alloc] init];

    for (NSString *key in propertyList)
    {
        @try
        {
            id value = [self valueForKey:key];
            [propertyDescriptions appendFormat:@"; %@ = %@\n", key, value];
        }
        @catch (NSException *exception)
        {
            [propertyDescriptions appendFormat:@"; %@ = N/A\n", key];
        }
    }
    
    [propertyDescriptions appendString:@"-- ivars:\n"];
    
    for (NSString *ivarName in ivarList)
    {
        @try
        {
            id value = [self valueForKey:ivarName];
            [propertyDescriptions appendFormat:@"; %@ = %@\n", ivarName, value];
        }
        @catch (NSException *exception)
        {
            [propertyDescriptions appendFormat:@"; %@ = N/A\n", ivarName];
        }
    }
    
    return [NSString stringWithFormat:@"<%@: 0x%lx\n%@>", [self class], (unsigned long)self, propertyDescriptions];
}