iOS開發中的SQLite知識總結
更詳細的數據庫SQlite介紹： http://mobile.51cto.com/iphone-388476.htm
http://www.w3cschool.cc/sqlite/sqlite-group-by.html
/Users/zhaochao/Library/Application Support/iPhone Simulator/7.1/Applications/07D17328-B63C-4D87-9B6C-03AA5CD681EA/Documents/zhaochao.sqlite， 就是 NSString *fileName=[NSHomeDirectory()
stringByAppendingFormat:@"/Documents/%@",name]; 這個目錄。文件可以直接用SQLiteManager軟件打開，也可以在firefox瀏覽器中安裝sqlitemanager插件打開，如下圖
3.BaseDB.m
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////
BaseDB.m//
SqliteDemo////
Created by 趙超 on 14-8-26.//
Copyright (c) 2014年 趙超. All rights reserved.//#import"BaseDB.h"@implementationBaseDB/* *
獲取沙盒目錄 *
name:追加的目錄aa * */-(NSString*)
DataBaseName:(NSString *) name { NSString
*fileName=[NSHomeDirectory() stringByAppendingFormat:@"/Documents/%@",name]; returnfileName;}/** *
選擇數據 *
sql:查詢的SQL語句 *
params:查詢SQL語句中的參數 *
dataName:查詢數據庫名稱 */ -(NSMutableArray*)
selectSql:(NSString *)sql parmas:(NSArray *)params dataBaseName:(NSString *)dataName{ sqlite3
*sqlite=nil; sqlite3_stmt
*stmt=nil; //打開數據庫 NSString
*fileName=[self DataBaseName:dataName]; intresult=
sqlite3_open([fileName UTF8String], &sqlite); if(result!=SQLITE_OK)
{ NSLog(@"打開失敗"); returnnil; } constchar*
sqlCh=[sql UTF8String]; //編譯SQL語句 sqlite3_prepare_v2(sqlite,
sqlCh, -1,
&stmt, NULL); //綁定參數 for(inti=0;
i<params.count; i++)=""{=""nsstring=""*param="[params"objectatindex:i];=""sqlite3_bind_text(stmt,=""i+1,=""[param=""utf8string],=""-1,=""null);=""}=""執行查詢語句=""result="sqlite3_step(stmt);"nsmutablearray=""*resultdata="[NSMutableArray"array];=""遍歷結果=""while=""(result="=SQLITE_ROW)"nsmutabledictionary=""*resultrow="[NSMutableDictionary"dictionary];=""獲取字段個數=""int=""col_count="sqlite3_column_count(stmt);"for=""(int=""i="0;"i<col_count;=""獲取字段名稱=""const=""char*columname="sqlite3_column_name(stmt,i);"獲取字段值=""char*=""columvalue="(char*)"sqlite3_column_text(stmt,=""i);=""*columkeystr="[NSString"stringwithcstring:columname=""encoding:nsutf8stringencoding];=""*columvaluestr="[NSString"stringwithcstring:columvalue=""[resultrow=""setobject:columvaluestr=""forkey:columkeystr];=""[resultdata=""addobject:resultrow];=""關閉數據庫句柄=""sqlite3_finalize(stmt);=""關閉數據庫=""sqlite3_close(sqlite);=""nslog(@"查詢完！");=""return=""resultdata;=""**=""*=""執行sql語句，主要完成增加、修改、刪除=""sql:執行的sql語句=""params:sql語句中的參數=""dataname:數據庫名稱=""-(bool)=""execsql:(nsstring=""*)sql=""parmas:(nsarray=""*)params=""databasename:(nsstring=""*)dataname{=""sqlite3=""*sqlite="nil;"sqlite3_stmt=""*stmt="nil;"打開數據庫=""*filename="[self"databasename:dataname];=""&sqlite);=""if=""(result!="SQLITE_OK)"nslog(@"打開失敗");=""no;=""sqlch="[sql"utf8string];=""編譯sql語句=""sqlite3_prepare_v2(sqlite,=""sqlch,=""&stmt,=""綁定參數=""i<params.count;=""*parm="[params"[parm=""執行sql=""||=""nslog(@"執行sql語句失敗");=""nslog(@"執行成功！");=""yes;=""創建一個表=""-(void)createtable:(nsstring=""}else{=""error;=""null,=""&error);=""nslog(@"創建失敗");=""nslog(@"%s",error);="";=""nslog(@"創建成功");=""@end=""<=""pre=""><br><h3>4.調用格式</h3><preclass="brush:java;"> BaseDB
*db=[[BaseDB alloc] init]; //創建表 NSString
*dbCreate=@"create
table zhaochao( username text primary key,userPasswd test)"; NSString
*dbName=@"zhaochao.sqlite"; //
[db createTable:dbCreate dataBaseName:dbName]; //添加數據 NSString
*insertTable=@"insert
into zhaochao (username,userPasswd) values (?,?)"; NSArray
*insertParmas=@[@"acasdfaa",@"bb"]; //
[db execSql:insertTable parmas:insertParmas dataBaseName:@"zhaochao.sqlite"]; //修改數據 NSString
*updateTable=@"update
zhaochao set username=? where username=?"; NSArray
*updateParams=@[@"admin",@"zhaochao"]; //
[db execSql:updateTable parmas:updateParams dataBaseName:@"zhaochao.sqlite"]; //刪除數據 NSString
*deleteTable=@"delete
from zhaochao where username=?"; NSArray
*deleteParams=@[@"aa"]; //
[db execSql:deleteTable parmas:deleteParams dataBaseName:@"zhaochao.sqlite"]; //查詢數據 NSString
*selectTable=@"select
username,userPasswd from zhaochao where userPasswd=?"; NSString
*selectParam=@[@"bb"]; NSArray
*result=[db selectSql:selectTable parmas:selectParam dataBaseName:@"zhaochao.sqlite"]; for(inti=0;
i<result.count; i++)=""{=""nsmutabledictionary=""*arr="[result"objectatindex:i];=""nslog(@"%@",arr);=""}=""<=""pre=""><br><br><br>
</result.count;></pre></params.count;> |