//將文件轉(zhuǎn)換成字符串
    //參數(shù)1：文件路徑
    //參數(shù)2：編碼格式
    //參數(shù)3：錯誤信息
    //NSError *error = nil;
    NSString * contentString = [NSString stringWithContentsOfFile:@"/Users/lanou3g/Desktop/7.19/C06_省市區(qū)/C06_省市區(qū)/area.txt" encoding:NSUTF8StringEncoding error:nil ];

 //創(chuàng)建省份數(shù)組
    NSMutableArray *provinceArr = [NSMutableArray array];
 //分割字符串(以換行符分割字符串遭京，得到每一行字符串內(nèi)容)
    NSArray * lineArray = [contentString componentsSeparatedByString:@"\n"];
    for (NSString *lineString in lineArray) {
       // NSLog(@"line:%@",lineString);
        if (![lineString hasPrefix:@" "]) {
            //前綴不是空格的話為省名
            //創(chuàng)建一個省份字典
            NSMutableDictionary * provinceDic = [NSMutableDictionary dictionary];
           
            //省份字典添加鍵值對（provinceName：省份名）
            [provinceDic setObject:lineString forKey:@"provinceName"];
            //創(chuàng)建一個城市數(shù)組（ps:用于以后存儲城市字典）
            NSMutableArray * cityArray = [NSMutableArray array];
            //添加鍵值對（cityArray：城市數(shù)組）
            [provinceDic setObject:cityArray forKey:@"cityArray"];
            //將省字典添加到省數(shù)組中
            [provinceArr addObject:provinceDic];
        }else if (![lineString hasPrefix:@"    "]){
             //前綴有空格且不是4個空格的話為城市名
            //當(dāng)讀取到省市名的時候需要找到該市所屬的省份（ps:省份數(shù)組中最后一個元素就是當(dāng)前所屬省份）
            NSMutableDictionary *provinceDic =[provinceArr lastObject];
            NSMutableArray * cityArr = [provinceDic objectForKey:@"cityArray"];
            //創(chuàng)建城市字典
            NSMutableDictionary * cityDic = [NSMutableDictionary dictionary];
            //添加鍵值對（ciytyName：城市名）
            [cityDic setObject:lineString forKey:@"cityName"];
            //創(chuàng)建地區(qū)數(shù)組（p-s:后面用于存儲地區(qū)名稱）
            NSMutableArray *areaArray = [NSMutableArray array];
             //添加鍵值對（areaArray：地區(qū)數(shù)組）
            [cityDic setObject:areaArray forKey:@"areaArray"];
            //將城市字典存儲到對應(yīng)的城市數(shù)組中
            [cityArr addObject:cityDic];
        }else {
            //前綴有空格且是4個空格的話為地區(qū)名
            //獲取地區(qū)屬省份
            NSMutableDictionary *provinceDic = [provinceArr lastObject];
            //獲取該省份的城市數(shù)組
            NSMutableArray * cityArr =[provinceDic objectForKey:@"cityArray"];
            //從城市數(shù)組中獲取當(dāng)前地區(qū)所屬的城市
            NSMutableDictionary * cityDic = [cityArr lastObject];
            //獲取該城市的地區(qū)數(shù)組
            NSMutableArray * areAarray = [cityDic objectForKey:@"areaArray"];
            [areAarray addObject:lineString];
        }
        
    }
   //NSLog(@"%@",provinceArr);
   // forin遍歷省數(shù)組名
    for (NSMutableDictionary * provinceDic in provinceArr) {
        NSLog(@"省份：%@",[provinceDic objectForKey:@"provinceName"]);
        for (NSMutableDictionary *cityDic in [provinceDic objectForKey: @"cityArray"]) {
            NSLog(@"市：%@",[cityDic objectForKey: @"cityName"]);
            for (NSString * areaName in [cityDic objectForKey:@"areaArray"]) {
                NSLog(@"地區(qū)：%@",areaName);
            }