01-Attribute list using-sqlite

1 //2 //VIEWCONTROLLER.M3 //01-Attribute list Use4 //5 //Created by Mac on 01/1/3.6 //copyright©2001 Year Mac. All rights reserved.7 //8 9 /**Ten  One table: A complete data sheet for recording data A field: An element in a data table or a piece of data that can be understood - data: A specific piece of data stored in a database -   the  */ - //////////////////////////////////////////////////////////////////////////// - /** - * Persistence of data +  * - * Database: Databases +   A * Oracle (commonly used in Java), MSSQLSERVER,DB2, MySQL (open source free, for small data volume) at   - * Apache: Server Software -   -   - * Client----Server (Network database access)-------1. To establish a connection 2. Start Operation 3. Get results 4. Close the connection------database -  in * * iOS development is generally as follows: - Local Database Access:sqlite-<----->-Client to   + * @param 1. Property List - * @return 2. Object Archive the * 3. SQLite database * * 4. CoreData $  */Panax Notoginseng #import "ViewController.h" -  the @interfaceViewcontroller () +  A @end the  + @implementationViewcontroller -  $- (void) Viewdidload { $ [Super Viewdidload]; -      -  the[Self Savevalue:@"1234"Forkey:@"Password"]; -     WuyiNSLog (@"==%@", [Self Readvalueforkey:@"Password"]); the      -NSLog (@"===%@", Nshomedirectory ()); Wu } -  About- (void) Savevalue: (ID) Password Forkey: (NSString *) Username { $      -     //The system's configuration local persistence class is used to store some simple user configurations -Nsuserdefaults *user =[Nsuserdefaults standarduserdefaults]; -     //nsuserdefaults *userdefaults = [[Nsuserdefaults alloc] init]; A      + [user Setobject:password forkey:username]; the } -  $-(Instancetype) Readvalueforkey: (NSString *) Username { the      theNsuserdefaults *user =[Nsuserdefaults standarduserdefaults]; the      the     return[user Objectforkey:username]; - } in  the @end

01-Attribute list using-sqlite