11/08 Code snippets

Books.m

DMAuthor *author1 = [DMAuthor authorWithFirstName:@"Jo" lastName:@"Walton"];
DMAuthor *author2 = [DMAuthor authorWithFirstName:@"Connie" lastName:@"Willis"];
DMAuthor *author3 = [DMAuthor authorWithFirstName:@"J.K." lastName:@"Rowling"];
    
DMBook *book1 = [[DMBook alloc] initWithTitle:@"Among Others" subtitle:nil price:10.19 andAuthor:author1];
DMBook *book2 = [[DMBook alloc] initWithTitle:@"Blackout" subtitle:nil price:11.68 andAuthor:author2];
DMBook *book3 = [[DMBook alloc] initWithTitle:@"Harry Potter with Philisopher's Stone" subtitle:nil price:10.0f andAuthor:author3];
DMBook *book4 = [[DMBook alloc] initWithTitle:@"Harry Potter with Chamber of Secrets" subtitle:nil price:12.0f andAuthor:author3];
DMBook *book5 = [[DMBook alloc] initWithTitle:@"Harry Potter with Prisoner of Azkaban" subtitle:nil price:14.0f andAuthor:author3];
    
NSArray *authors = @[author1, author2, author3];
NSArray *books = @[book1, book2, book3, book4, book5];

DMBook.h

//
//  DMBook.h
//  demo
//
//  Created by sodas on 11/8/12.
//  Copyright (c) 2012 NTU Mobile HCI Lab. All rights reserved.
//

#import <Foundation/Foundation.h>

@interface DMAuthor : NSObject

@property (nonatomic, copy) NSString *firstName;
@property (nonatomic, copy) NSString *lastName;
@property (nonatomic, readonly) NSString *fullName;

+ (id)authorWithFirstName:(NSString *)firstName lastName:(NSString *)lastName;
- (id)initWithFirstName:(NSString *)firstName lastName:(NSString *)lastName;

@end

@interface DMBook : NSObject

@property (nonatomic, weak) DMAuthor *author;
@property (nonatomic) float price;
@property (nonatomic, copy) NSString *title;
@property (nonatomic, copy) NSString *subtitle;

+ (id)bookWithTitle:(NSString *)title;
- (id)initWithTitle:(NSString *)title subtitle:(NSString *)subtitle price:(float)price andAuthor:(DMAuthor *)author;

@end

DMBook.m

//
//  DMBook.m
//  demo
//
//  Created by sodas on 11/8/12.
//  Copyright (c) 2012 NTU Mobile HCI Lab. All rights reserved.
//

#import "DMBook.h"

@implementation DMAuthor

- (NSString *)fullName {
    return [NSString stringWithFormat:@"%@ %@",
            self.firstName, self.lastName];
}

+ (id)authorWithFirstName:(NSString *)firstName lastName:(NSString *)lastName {
    return [[self alloc] initWithFirstName:firstName lastName:lastName];
}
- (id)initWithFirstName:(NSString *)firstName lastName:(NSString *)lastName {
    if (self = [super init]) {
        _firstName = firstName;
        _lastName = lastName;
    }
    return self;
}

@end

@implementation DMBook

+ (id)bookWithTitle:(NSString *)title {
    return [[self alloc] initWithTitle:title
                              subtitle:nil
                                 price:0.0f
                             andAuthor:nil];
}

- (id)initWithTitle:(NSString *)title subtitle:(NSString *)subtitle price:(float)price andAuthor:(DMAuthor *)author {
    if (self = [super init]) {
        _title = title;
        _subtitle = subtitle;
        _price = price;
        _author = author;
    }
    return self;
}

@end