1. 概念
用于存储串行化对象，xml格式，存储到plist文件中。
2. 用途
存储用户设置。
3. 优点
- 程序运行时可动态创建和读写。
4. 使用说明
4.1. 获取plist文件
NSString *documentPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
NSString *filePath = [documentPath stringByAppendingPathComponent:@"student.plist"];
4.2. 存储数据
NSMutableDictionary *dict = [NSMutableDictionary dictionary];
NSDictionary *stu1= @{@"idNum":@"",@"name": @"jereh"};
[dict setValue:stu1 forKey:@"stu1"];
// 新数据写入plist文件
[dict writeToFile:filePath atomically:YES];
4.3. 读取数据
NSMutableDictionary *dicNow = [[NSMutableDictionary alloc] initWithContentsOfFile:filePath];
int idNum = [[dicNow objectForKey:@"idNum"] intValue];
NSString *name = [dicNow objectForKey:@"name"];