字典转模型

            NSArray *categorys = [AccountTool categorys];

NSMutableArray *faCategoryListArr = [[NSMutableArray alloc] init];
for (NSDictionary *mDic in categorys) {
CategoryModel *faModel = [[CategoryModel alloc] init];//father model
faModel.cat_id = mDic[@"id"];
faModel.parent_id = mDic[@"parentId"];
faModel.cat_name = mDic[@"catName"];
if ([[mDic allKeys] containsObject:@"categoryList"]) {
NSArray *childCategoryListArr = mDic[@"categoryList"];
NSMutableArray *childrensArr = [[NSMutableArray alloc] init];
for (NSDictionary *childDic in childCategoryListArr) {
CategoryModel *childModel = [[CategoryModel alloc] init];//child model
childModel.cat_id = childDic[@"id"];
childModel.parent_id = childDic[@"parentId"];
childModel.cat_name = childDic[@"catName"];
[childrensArr addObject:childModel];
}
faModel.children = childrensArr;
}
[faCategoryListArr addObject:faModel];
}