Objective-C-省份城市地区（17-08-02）TEA

//
//  main.m
//  OC06_省市区
//
//  Created by lanou3g on 17/8/2.
//  Copyright © 2017年 lanou3g. All rights reserved.
//

#import <Foundation/Foundation.h>

int main(int argc, const char * argv[]) {
    
    //创建省份数组
    NSMutableArray *provinceArray = [NSMutableArray array];

    //加载文件得到的字符串
    //参数1:文件路径
    //参数2:编码格式
    //参数3:错误信息
//    NSError *error = nil;
    NSString *contentString = [NSString stringWithContentsOfFile:@"/Users/lanou3g/Downloads/area.txt" encoding:NSUTF8StringEncoding error:nil];
//    NSLog(@"%@",contentString);
    //用\n分割字符串,得到每一行的字符串内容
    NSArray *lineArray = [contentString componentsSeparatedByString:@"\n"];
    for (NSString *lineString in lineArray) {
//        NSLog(@"line:%@",lineString);
        
        if (![lineString hasPrefix:@" "]) {
            //前缀不是空格的话为省名
            
            //创建一个省份字典
            NSMutableDictionary *provienceDic = [NSMutableDictionary dictionary];
            //省份字典添加键值对（provienceName：省份名）
            [provienceDic setObject:lineString forKey:@"provienceName"];
            //创建一个城市数组（ps:用于后面存储城市字典）
            NSMutableArray *cityArray = [NSMutableArray array];
            //添加键值对（cityArray：城市数组）
            [provienceDic setObject:cityArray forKey:@"cityArray"];
            //将省份字典添加到省份数组中
            [provinceArray addObject:provienceDic];
            
        }else if(![lineString hasPrefix:@"    "]) {
            //前缀有空格且不是4个空格的话为城市名
            //当读取到城市名的时候需要找到该城市所属的省份（ps:当前省份数组中最后一个元素就是当前城市所属省份）
            NSMutableDictionary *provienceDic = [provinceArray lastObject];
            NSMutableArray *cityArray = [provienceDic objectForKey:@"cityArray"];
            //创建城市字典（有两个键值对）
            NSMutableDictionary *cityDic = [NSMutableDictionary dictionary];
            //添加键值对（cityName：城市名称）
            [cityDic setObject:lineString forKey:@"cityName"];
            //创建地区的数组(后面用于存储地区名称)
            NSMutableArray *areaArray = [NSMutableArray array];
            //添加键值对（areaArray:地区数组）
            [cityDic setObject:areaArray forKey:@"areaArray"];
            //将城市字典存入到对应的城市数组中
            [cityArray addObject:cityDic];
            
        }else {
            //前缀有空格且有4个空格为地区名
            //获取当前地区所属省份
            NSMutableDictionary *provinceDic = [provinceArray lastObject];
            //获取该省份的城市数组
            NSMutableArray *cityArray = [provinceDic objectForKey:@"cityArray"];
            //从城市数组中取当前地区所属的城市
            NSMutableDictionary *cityDic = [cityArray lastObject];
            //获取该城市的地区数组
            NSMutableArray *areArray = [cityDic objectForKey:@"areaArray"];
            //将地区名存入该地区数组
            [areArray addObject:lineString];
            
        }
    }
    

//    NSLog(@"%@",provinceArray);
    
    //遍历
    for (NSMutableDictionary *provinceDic in provinceArray) {
        NSLog(@"省份：%@",[provinceDic objectForKey:@"provienceName"]);
        for (NSMutableDictionary *cityDic in [provinceDic objectForKey:@"cityArray"]) {
            NSLog(@"城市：%@",[cityDic objectForKey:@"cityName"]);
            for (NSString *areaName in [cityDic objectForKey:@"areaArray"]) {
                NSLog(@"地区：%@",areaName);
            }
        }
    }

    return 0;
}