从plist文件中读取数据

- (void)readDataFromPlist
{
       1.先获取文件路径
    NSString * filePath = [[NSBundle mainBundle] pathForResource:@"Book" ofType:@"plist"];
        2.根据路径初始化字典对象
    self.dic = [NSDictionary dictionaryWithContentsOfFile:filePath];
    
       将不可边字典变成可变字典
    
   self.addressBook = [NSMutableDictionary dictionaryWithDictionary:_dic];
    
     将字典封装成对象
     (1)从字典中遍历出key
    for (NSString * key in self.dic) {
       

    根据key获取对应的数组

        NSArray * groupArr =self.dic[key];
        
 (5) 创建可变的小数组,存储封装的对象
        NSMutableArray * newGroupArr = [NSMutableArray array];

 (3)获取小数组中元素(遍历小数组)

        for (NSDictionary * groupDic in groupArr) {
 

 (4)通过字典初始化AddressPerson

            AddressPerson * Person = [[AddressPerson alloc]initWithDic:groupDic];
                        
            [newGroupArr addObject:Person];//将对象存储到新的可变数组中
            RELEASE_SAFE(Person);
        }
     

        将要原来key对应的存储字典的小数组替换成装有对象的心得可变的数组

         [self.addressBook setObject:newGroupArr forKey:key];
    }
    
     取出字典中所有的key
    self.orderedKeys= [[self.addressBook allKeys]sortedArrayUsingSelector:@selector(compare:)];
     NSLog(@"%@",addressBook);
       
}