iOS Sqlite3 Demo 及 FMDB Demo

　　本文是主要实现了三个函数：

• 　　testSQLite3 是测试系统自带的sqlite3的demo
• 　　testFMDB是测试FMDB存取简单的数据类型的 的demo
• 　　testFMDB2是将任意对象作为一个整体存入到FMDB的Demo

　　首先先定义了一个Person类，实现了<NSCoding>协议，对Person对象进行字段存取和整体存取

 1 //Person.h
 2 #import <Foundation/Foundation.h>
 3 
 4 @interface Person : NSObject<NSCoding>
 5 @property (nonatomic ,assign)int id;
 6 @property (nonatomic ,copy) NSString *name;
 7 @property (nonatomic ,assign)int age;
 8 @end
 9 
10 //Person.m
11 #import "Person.h"
12 
13 @implementation Person
14 -(NSString *)description{
15     return [NSString stringWithFormat:@"id:%d--name:%@--age:%d",self.id,self.name,self.age];
16 }
17 -(instancetype)initWithCoder:(NSCoder *)decoder{
18     if (self = [super init]) {
19         self.id = [decoder decodeIntForKey:@"id"];
20         self.name = [decoder decodeObjectForKey:@"name"];
21         self.age = [decoder decodeIntForKey:@"age"];
22     }
23     return self;
24 }
25 -(void)encodeWithCoder:(NSCoder *)encoder{
26     [encoder encodeInt:self.id
27                 forKey:@"id"];
28     [encoder encodeObject:self.name forKey:@"name"];
29     [encoder encodeInt:self.age forKey:@"age"];
30 }
31 @end

Person