初识MVC和KVC

//
// 模型数据文件
//  Message.h
//  Created by xiaomoge on 14/12/31.
//  Copyright (c) 2014年 xiaomoge. All rights reserved.
//

#import <Foundation/Foundation.h>
@interface Message : NSObject
/*
内容
*/
@property (nonatomic,copy) NSString *text;
/*
时间
*/
@property (nonatomic,copy) NSString *time;
/*
构造方法
*/
- (instancetype)initWithDict:(NSDictionary *)dict;
/*
类工厂方法
*/
+ (instancetype)messageWithDict:(NSDictionary *)dict;

+ (NSMutableArray *)messageList;
@end


//
//  Message.m
//  
//
//  Created by xiaomoge on 14/12/31.
//  Copyright (c) 2014年 xiaomoge. All rights reserved.
//

#import "Message.h"

@implementation Message
- (instancetype)initWithDict:(NSDictionary *)dict {
    if (self = [super init]) {
        //这里就是使用了KVC，这一句话就相当于下面注释的两句了。如果有很多个属性时，使用KVC是否方便了很多？
        [self setValuesForKeysWithDictionary:dict];
        //self.text = dict[@"text"];
        //self.time = dict[@"time"];
    }
    return self;
}

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

+ (NSMutableArray *)messageList {
    NSString *path = [[NSBundle mainBundle] pathForResource:@"messages" ofType:@"plist"];
    NSArray *messageArray = [NSArray arrayWithContentsOfFile:path];
    
    NSMutableArray *tempArray = [NSMutableArray array];
    
    for (NSDictionary *dict in messageArray) {
        Message *message = [Message messageWithDict:dict];
        [tempArray addObject:message];
    }
    return tempArray;
}