c methods to get class properties classes from properties attributes

AppDelegate.h

#import <UIKit/UIKit.h>

@interface AppDelegate : UIResponder <UIApplicationDelegate>

@property (strong, nonatomic) UIWindow *window;

@end

AppDelegate.m

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

static const char *getPropertyType(objc_property_t property) {
    const char *attributes = property_getAttributes(property);
    //printf("attributes=%s\n", attributes);
    char buffer[1 + strlen(attributes)];
    strcpy(buffer, attributes);
    char *state = buffer, *attribute;
    while ((attribute = strsep(&state, ",")) != NULL) {
        if (attribute[0] == 'T' && attribute[1] != '@') {
            // it's a C primitive type:
            /*
             if you want a list of what will be returned for these primitives, search online for
             "objective-c" "Property Attribute Description Examples"
             apple docs list plenty of examples of what you get for int "i", long "l", unsigned "I", struct, etc.
             */
            NSString *name = [[NSString alloc] initWithBytes:attribute + 1 length:strlen(attribute) - 1 encoding:NSASCIIStringEncoding];
            return (const char *)[name cStringUsingEncoding:NSASCIIStringEncoding];
        }
        else if (attribute[0] == 'T' && attribute[1] == '@' && strlen(attribute) == 2) {
            // it's an ObjC id type:
            return "id";
        }
        else if (attribute[0] == 'T' && attribute[1] == '@') {
            // it's another ObjC object type:
            NSString *name = [[NSString alloc] initWithBytes:attribute + 3 length:strlen(attribute) - 4 encoding:NSASCIIStringEncoding];
            return (const char *)[name cStringUsingEncoding:NSASCIIStringEncoding];
        }
    }
    return "";
}

NSDictionary *classPropertiesClassesByPropertiesNames(__unsafe_unretained Class class) {
    NSMutableDictionary *dictionary = [NSMutableDictionary new];
    unsigned count;
    objc_property_t *properties = class_copyPropertyList(class, &count);
    
    for (unsigned i = 0; i < count; ++i) {
        objc_property_t property = properties[i];
        NSString *propertyName = [NSString stringWithUTF8String:property_getName(property)];
        //        NSString *propertyAttributes = [NSString stringWithUTF8String:property_getAttributes(property)];
        NSString *propertyType = [NSString stringWithUTF8String:getPropertyType(property)];
        [dictionary setObject:propertyType forKey:propertyName];
    }
    free(properties);
    
    return [NSDictionary dictionaryWithDictionary:dictionary];
}


@interface PPRefixSomeRandomClassToCheckTypes : NSObject

@property (nonatomic, strong) id unknownIdentifier;
@property (nonatomic, strong) NSArray *array;
@property (nonatomic, strong) NSString *string;
@property (nonatomic, strong) NSDictionary *dictionary;
@property (nonatomic, assign) NSInteger integerValue;
@property (nonatomic, assign) CGFloat floatValue;
@property (nonatomic, assign) CGRect rectStructValue;
@property (nonatomic, assign) BOOL boolValue;

@end

@implementation PPRefixSomeRandomClassToCheckTypes

@end


@implementation AppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    NSDictionary *dictionary = classPropertiesClassesByPropertiesNames([PPRefixSomeRandomClassToCheckTypes class]);
    
    NSLog(@"%@", dictionary);
    
    return YES;
}

@end

http://stackoverflow.com/questions/754824/get-an-object-properties-list-in-objective-c