iOS学习

//
//  YJCar.h
//  03-tableView-汽车品牌
//
//  Created by JACKY-MAC on 15-6-24.
//  Copyright (c) 2015年 www.train.com. All rights reserved.
//字典转模型

#import <Foundation/Foundation.h>

@interface YJCar : NSObject
@property(nonatomic,copy)NSString *icon;
@property(nonatomic,copy)NSString *name;

- (instancetype)initWithDict:(NSDictionary *)dict;
+(instancetype)carWithDict:(NSDictionary *)dict;

+(NSArray *)carsWithArray:(NSArray *)array;

@end

//
//  HMCar.m
//  05-汽车品牌
//
//  Created by apple on 14-8-19.
//  Copyright (c) 2014年 itcast. All rights reserved.
//

#import "HMCar.h"

@implementation HMCar

- (instancetype)initWithDict:(NSDictionary *)dict
{
    self = [super init];
    if (self) {
        [self setValuesForKeysWithDictionary:dict];
    }
    return self;
}

+ (instancetype)carWithDict:(NSDictionary *)dict
{
    return [[self alloc] initWithDict:dict];
}

+ (NSArray *)carsWithArray:(NSArray *)array
{
    NSMutableArray *arrayM = [NSMutableArray array];
    for (NSDictionary *dict in array) {
        [arrayM addObject:[self carWithDict:dict]];
    }
    
    return arrayM;
}

- (NSString *)description
{
    return [NSString stringWithFormat:@"<%@: %p> {name: %@, icon: %@}", self.class, self,self.name, self.icon];
}

@end


//
//  HMCarGroup.h
//  05-汽车品牌
//
//  Created by apple on 14-8-19.
//  Copyright (c) 2014年 itcast. All rights reserved.
//

#import <Foundation/Foundation.h>

@interface HMCarGroup : NSObject
/** 首字母 */
@property (nonatomic, copy) NSString *title;
/** 车的数组，存放的是HMCar的模型数据 */
@property (nonatomic, strong) NSArray *cars;

- (instancetype)initWithDict:(NSDictionary *)dict;
+ (instancetype)carGroupWithDict:(NSDictionary *)dict;

+ (NSArray *)carGroups;

@end


//
//  HMCarGroup.m
//  05-汽车品牌
//
//  Created by apple on 14-8-19.
//  Copyright (c) 2014年 itcast. All rights reserved.
//

#import "HMCarGroup.h"
#import "HMCar.h"

@implementation HMCarGroup

- (instancetype)initWithDict:(NSDictionary *)dict
{
    self = [super init];
    if (self) {
//        [self setValuesForKeysWithDictionary:dict];
        [self setValue:dict[@"title"] forKey:@"title"];
        
        // dict[@"cars"]存放的是字典的数组
        // 希望将字典的数组转换成HMCar模型的数组
//        [self setValue:dict[@"cars"] forKey:@"cars"];
        self.cars = [HMCar carsWithArray:dict[@"cars"]];
    }
    return self;
}

+ (instancetype)carGroupWithDict:(NSDictionary *)dict
{
    return [[self alloc] initWithDict:dict];
}

+ (NSArray *)carGroups
{
    NSArray *array = [NSArray arrayWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"cars_total.plist" ofType:nil]];
    
    NSMutableArray *arrayM = [NSMutableArray array];
    for (NSDictionary *dict in array) {
        [arrayM addObject:[self carGroupWithDict:dict]];
    }
    
    return arrayM;
}

- (NSString *)description
{
    return [NSString stringWithFormat:@"<%@: %p> {title: %@, cars: %@}", self.class, self, self.title, self.cars];
}





//
//  HMViewController.m
//  05-汽车品牌
//
//  Created by apple on 14-8-19.
//  Copyright (c) 2014年 itcast. All rights reserved.
//

#import "HMViewController.h"
#import "HMCarGroup.h"
#import "HMCar.h"

@interface HMViewController () <UITableViewDataSource>
@property (nonatomic, strong) NSArray *carGroups;
@property (nonatomic, strong) UITableView *tableView;
@end

@implementation HMViewController

- (UITableView *)tableView
{
    if (_tableView == nil) {
        _tableView = [[UITableView alloc] initWithFrame:self.view.bounds style:UITableViewStylePlain];
        _tableView.dataSource = self;
        
        [self.view addSubview:_tableView];
    }
    return _tableView;
}

- (NSArray *)carGroups
{
    if (_carGroups == nil) {
        _carGroups = [HMCarGroup carGroups];
    }
    return _carGroups;
}

- (void)viewDidLoad
{
    [super viewDidLoad];

    // 调用tableView添加到视图
    [self tableView];
}

#pragma mark - 数据源方法
// 分组总数
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    return self.carGroups.count;
}

// 每一组的总数
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    HMCarGroup *group = self.carGroups[section];
    
    return group.cars.count;
}

// 单元格
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    // 可重用标示符
    static NSString *ID = @"Cell";
    
    // 让表格缓冲区查找可重用cell
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:ID];
    
    // 如果没有找到可重用cell
    if (cell == nil) {
        // 实例化cell
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:ID];
    }
    
    // 设置cell内容
    // 1> 取出数据模型
    HMCarGroup *group = self.carGroups[indexPath.section];
    HMCar *car = group.cars[indexPath.row];
    
    // 2> 设置数据
    cell.imageView.image = [UIImage imageNamed:car.icon];
    cell.textLabel.text = car.name;
    
    return cell;
}

// 标题
- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
{
    // 找到group
    HMCarGroup *group = self.carGroups[section];
    
    return group.title;
}

// 右侧索引列表
- (NSArray *)sectionIndexTitlesForTableView:(UITableView *)tableView
{
    // 索引数组中的"内容"，跟分组无关
    // 索引数组中的下标，对应的是分组的下标
//    return @[@"哇哈哈", @"hello", @"哇哈哈", @"hello", @"哇哈哈", @"hello", @"哇哈哈", @"hello"];
    
    // 返回self.carGroup中title的数组
//    NSMutableArray *arrayM = [NSMutableArray array];
//    for (HMCarGroup *group in self.carGroups) {
//        [arrayM addObject:group.title];
//    }
//    return arrayM;
    
    // KVC是cocoa的大招
    // 用来间接获取或者修改对象属性的方式
    // 使用KVC在获取数值时，如果指定对象不包含keyPath的"键名"，会自动进入对象的内部查找
    // 如果取值的对象是一个数组，同样返回一个数组
    NSArray *array = [self.carGroups valueForKeyPath:@"cars.name"];
    NSLog(@"%@", array);
    
    return [self.carGroups valueForKeyPath:@"title"];
}

@end