iOS Refactor

main.m

// Create a new command-line project in Xcode by going to
// File -> New -> Project
// Under "OS X" select "Application" and "Command Line Tool"
// Name the product whatever you want and set the type to "Foundation"
// Replace the created main.m file with this file

#import <Foundation/Foundation.h>

@interface Email : NSObject

@property (nonatomic, strong) NSString *e;

- (id)initWithAddress:(NSString *)email;

- (void)sendEmail:(NSString *)body;

@end

@implementation Email

- (id)initWithAddress:(NSString *)email
{
    if (self = [super init]) {
        
        _e = email;
    }
    return self;
}

- (void)sendEmail:(NSString *)body
{
    NSLog(@"Email sent to %@", _e);
}

@end

@interface Phone : NSObject

@property (nonatomic, strong) NSString *n;

- (id)init:(NSString*)num;

- (void)sendSms:(NSString *)m;

@end

@implementation Phone

- (id)init:(NSString *)num
{
    if (self = [super init]){
        _n = num;
    }
    return self;
}

- (void)sendSms:(NSString *)m
{
    NSLog(@"SMS sent to %@", _n);
}

@end

@interface Message : NSObject

@property (nonatomic, strong) NSString *mBody;

- (id)initWithBody:(NSString *)body;

- (void)send:(NSArray *)recipients;

@end

@implementation Message

- (id)initWithBody:(NSString *)body
{
    if (self = [super init])
    {
        _mBody = body;
    }
    return self;
}

- (void)send:(NSArray *)recipients
{
    if ([self check])
    {
        NSLog(@"Sending '%@'", _mBody);
        for (int i = 0; i < recipients.count; i++){
            
            id obj = [recipients objectAtIndex:i];
            
            if ([obj isKindOfClass:[Phone class]]){
                [((Phone *)obj) sendSms:_mBody];
            }
            else if([obj isKindOfClass:[Email class]]){
                [((Email*)obj) sendEmail:_mBody];
            }
            else{
                NSLog(@"Couldn't send to %@", obj);
            }
        }
    }
}

- (BOOL)check
{
    return _mBody.length;
}

@end

int main(int argc, const char * argv[])
{

    @autoreleasepool {
        
        NSArray *recipients = [[NSArray alloc] initWithObjects:
                               [[Phone alloc] init:@"8675309"],
                               [[Email alloc] initWithAddress:@"jenny@tutone.net"],
                               @"tommy@tutone.net",
                               nil];
        
        [[[Message alloc] initWithBody:@"Who can I turn to?"] send:recipients];
        
    }
    return 0;
}