1. 预备知识@H_403_4@
读者需要有一定的sqlite数据库知识，懂得基本的sql语句，掌握OSX系统terminal终端 以及 XCode编译器 的基本操作。@H_403_4@
打开 Applications-Utilities-Terminal，可见终端窗口。@H_403_4@
假设当前系统用户为Smitty，可在终端窗口内键入如下命令：@H_403_4@
cd /Users/Smitty/Documents@H_403_4@
sqlite3 PersonDatabase.sql@H_403_4@
至此，你已经在/Users/lookaflyingdonkey/Documents目录下创建了一个新的目录sqliteDemo，并使用 sqlite3命令开启了sqlite终端，准备建立数据库结构并输入数据。@H_403_4@
举例来说，若我们要建立的数据库表person需要有如下结构：唯一的id值，名字，职位描述，头像图片地址，那么下列命令将创建这个表，并添加几个人的纪录。@H_403_4@
CREATE TABLE person (id INTEGER PRIMARY KEY,name VARCHAR(50),title TEXT,icon VARCHAR(255) );@H_403_4@
INSERT INTO person (name,title,icon) VALUES('Peter','handy man','http://dblog.com.au/wp-content/elephant.jpg');@H_403_4@
INSERT INTO person (name,icon) VALUES('Susan','manager','http://dblog.com.au/wp-content/monkey.jpg');@H_403_4@
INSERT INTO person (name,icon) VALUES('Wilson','developer','http://dblog.com.au/wp-content/kangaroo.jpg');@H_403_4@
执行完这几步后，可运行命令"SELECT * FROM person;"，检查数据库中是否已存在上面插入的数据。一旦确认一切正常，可用命令".quit"退出sqlite 命令行模式。@H_403_4@
3. 创建项目@H_403_4@
现在让我门创建Xcode项目。@H_403_4@
首先在Xcode中选择创建一个新的” Navigation-Based Application“@H_403_4@
输入项目名称"sqliteDemo"，由于之前在同一位置创建了同名目录，Xcode将会询问是否覆盖已经存在的目录sqliteDemo，选则是。这将使项目目录结构如下图所示。@H_403_4@
4. 将sqlite框架和PersonDatabas数据库导入项目@H_403_4@
首先我们需要将sqlite库引入项目。请右键点击左部菜单中的"Frameworks"目录，选择“Add > Existing Frameworks…”，@H_403_4@
然后在本地目录中选择“/Developer/Platforms/iPhoneOS.platform/Developer /SDKs/iPhoneOS3.0.sdk/usr/lib/”，找到“libsqlite3.0.dylib”文件并双击。@H_403_4@
一个弹出窗口将出现，点击其中“Add”按钮将库添加入项目中。@H_403_4@
@H_403_4@
我们也需要将PersonDatabas 数据库导入Resources目录。请右键点击“Resources”目录，选择“Add > Existing Files…”，在本地目录中选择“/Users/Smitty/Documents/sqliteDemo/”,双击PersonDatabase.sql文件，点击弹出窗口中的“Add”按钮将其导入当前项目。@H_403_4@
5. 开始编程@H_403_4@
首先创建一个Person类。右键点击“Classes”目录，选择“Add > New File…”，在弹出窗口中选择“iPhone OS > Cocoa Touch Class > Objective-C class > NSObject” 并点击“Next”按钮。在下一窗口中，设置File Name为“Person.m”。点击“Finish”按钮完成创建。@H_403_4@
@interface Person : NSObject {@H_403_4@
NSString *name;@H_403_4@
NSString *title;@H_403_4@
NSString *iconURL;@H_403_4@
}@H_403_4@
@property (nonatomic,retain) NSString *name;@H_403_4@
@property (nonatomic,retain) NSString *title;@H_403_4@
@property (nonatomic,retain) NSString *iconURL;@H_403_4@
-(id)initWithName:(NSString *)n title:(NSString *)t url:(NSString *)u;@H_403_4@
@end@H_403_4@
#import "Person.h"@H_403_4@
@implementation Person@H_403_4@
@synthesize name,iconURL;@H_403_4@
-(id)initWithName:(NSString *)n title:(NSString *)t url:(NSString *)u {@H_403_4@
self.name=n;@H_403_4@
self.title=t;@H_403_4@
self.iconURL=u;@H_403_4@
return self;@H_403_4@
}@H_403_4@
@end@H_403_4@
修改Other Sources/main.m为：@H_403_4@
#import@H_403_4@
#import "Person.h"@H_403_4@
int main(int argc,char *argv[]) {@H_403_4@
NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];@H_403_4@
//setup database name.@H_403_4@
NSString *databaseName = @"PersonDatabase.sql";@H_403_4@
// Get the path to the documents directory and append the databaseName@H_403_4@
NSArray *documentPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES);@H_403_4@
NSString *documentsDir = [documentPaths objectAtIndex:0];@H_403_4@
NSString *databasePath = [documentsDirstringByAppendingPathComponent:databaseName];@H_403_4@
@H_403_4@
// Create a FileManager object,we will use this to check the status@H_403_4@
// of the database and to copy it over if required@H_403_4@
NSFileManager *fileManager = [NSFileManager defaultManager];@H_403_4@
// Check if the database has already been created in the users filesystem@H_403_4@
BOOL success = [fileManager fileExistsAtPath:databasePath];@H_403_4@
// If the database already exists then return without doing anything@H_403_4@
if(!success){@H_403_4@
// If not then proceed to copy the database from the application to the users filesystem@H_403_4@
// Get the path to the database in the application package@H_403_4@
NSString *databasePathFromApp = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:databaseName];@H_403_4@
// Copy the database from the package to the users filesystem@H_403_4@
[fileManager copyItemAtPath:databasePathFromApp toPath:databasePath error:nil];@H_403_4@
}@H_403_4@
// Query the database for all person records and construct the "person" array@H_403_4@
// Init the animals Array@H_403_4@
NSMutableArray *personArr = [[NSMutableArray alloc] init];@H_403_4@
// Open the database from the users filessytem@H_403_4@
if(sqlite3_open([databasePath UTF8String],&database) == sqlITE_OK) {@H_403_4@
// Setup the sql Statement and compile it for faster access@H_403_4@
const char *sqlStatement = "select * from person";@H_403_4@
sqlite3_stmt *compiledStatement;@H_403_4@
if(sqlite3_prepare_v2(database,sqlStatement,-1,&compiledStatement,NULL) == sqlITE_OK) {@H_403_4@
// Loop through the results and add them to the Feeds array@H_403_4@
while(sqlite3_step(compiledStatement) == sqlITE_ROW) {@H_403_4@
// Read the data from the result row@H_403_4@
NSString *aName = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement,1)];@H_403_4@
NSString *aTitle = [NSString stringWithUTF8String:(char*)sqlite3_column_text(compiledStatement,2)];@H_403_4@
@H_403_4@
NSString *aIconUrl = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement,3)];@H_403_4@
// Create a new animal object with the data from the database@H_403_4@
Person *person = [[Person alloc] initWithName:aName title:aTitle url:aIconUrl];@H_403_4@
// Add the animal object to the animals Array@H_403_4@
[personArr addObject:person];@H_403_4@
[person release];@H_403_4@
}@H_403_4@
}@H_403_4@
// Release the compiled statement from memory@H_403_4@
sqlite3_finalize(compiledStatement);@H_403_4@
}@H_403_4@
sqlite3_close(database);@H_403_4@
for (Person *tmpPerson in personArr) {@H_403_4@
NSLog(@"You can see %@ %@'s icon at %@",tmpPerson.title,tmpPerson.name,tmpPerson.iconURL);@H_403_4@
[tmpPerson release];@H_403_4@
}@H_403_4@
NSLog(@"Done.");@H_403_4@
[personArr release];@H_403_4@
[fileManager release];@H_403_4@
[pool release];@H_403_4@
return (0);@H_403_4@
}@H_403_4@
6. 编译执行@H_403_4@
完成修改后，运行“Build > Build and Run”,关掉弹出的iPhone Simulator窗口，选择"Run > Console" 打开控制台，可看到如下输出信息。@H_403_4@
参考：@H_403_4@
http://www.cnblogs.com/AlexLiu/archive/2010/04/21/1716740.html@H_403_4@
