IOS 字典转模型

用模型存放字典上的内容，方便使用

一、创建类MJHero

1、在头文件声明属性，声明对象方法，类方法 

#import <Foundation/Foundation.h>

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

+ (instancetype)heroWithDict:(NSDictionary *)dict;
- (instancetype)initWithDict:(NSDictionary *)dict;
@end

2、在.m实现方法

#import "MJHero.h"

@implementation MJHero
+ (instancetype)heroWithDict:(NSDictionary *)dict
{
    return [[self alloc] initWithDict:dict];
}

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

二、在ViewController.m中添加数组和get方法

#import "MJViewController.h"
#import "MJHero.h"

@property (nonatomic, strong) NSArray *heros;

- (NSArray *)heros
{
    if (_heros == nil) {
        // 初始化
        // 1.获得plist的全路径
        NSString *path = [[NSBundle mainBundle] pathForResource:@"heros.plist" ofType:nil];
        
        // 2.加载数组
        NSArray *dictArray = [NSArray arrayWithContentsOfFile:path];
        
        // 3.将dictArray里面的所有字典转成模型对象,放到新的数组中
        NSMutableArray *heroArray = [NSMutableArray array];
        for (NSDictionary *dict in dictArray) {
            // 3.1.创建模型对象
            MJHero *hero = [MJHero heroWithDict:dict];
            
            // 3.2.添加模型对象到数组中
            [heroArray addObject:hero];
        }
        
        // 4.赋值
        _heros = heroArray;
    }
    return _heros;
}