25、iOS数据存储与Core Data实战解析

iOS数据存储与Core Data实战解析

1. SQLite基础操作与挑战

1.1 代码实现

在iOS开发中，使用SQLite进行数据存储是一种常见的方式。以下是一段展示如何在表格视图中显示国家信息的代码：

- (UITableViewCell *)tableView:(UITableView *)tableView
           cellForRowAtIndexPath:(NSIndexPath *)ip
{
   // Get the dictionary for the continent for this section
   NSDictionary *continentDict = [continents objectAtIndex:[ip section]];
   // Get the array of nations for this continent
   NSArray *nations = [continentDict objectForKey:@"list"];
   // Which nation is at the required row?
   NSDictionary *nationDict = [nations objectAtIndex:[ip row]];
   // What is its name?
   NSString *nationName = [nationDict objectForKey:@"name"];
   // Try to reuse an existing cell
   UITableViewCell *cell =