[Code Note] iOS-FMDBDemo, note ios-fmdbdemo

[Code Note] iOS-FMDBDemo, note ios-fmdbdemo

I ,.

2. Engineering Drawing.

3. Code.

ViewController. h

#import <UIKit/UIKit.h>#import "FMDatabase.h"#import "FMDatabaseQueue.h"@interface ViewController : UIViewController{    FMDatabase *db;    NSString *database_path;    }@end

 

ViewController. m

# Import "ViewController. h "# define DBNAME @" personinfo. sqlite "# define ID @" id "# define NAME @" name "# define AGE @" age "# define ADDRESS @" address "# define TABLENAME @" PERSONINFO "@ interface ViewController () @ end @ implementation ViewController-(void) viewDidLoad {[super viewDidLoad]; // Do any additional setup after loading the view, typically from a nib. // initialize the database storage directory [self addDocumentPath]; // The initialization interface [self AddView]; [super viewDidLoad] ;}# pragma-mark-functions // initialize the database storage directory-(void) addDocumentPath {// obtain the Documents directory NSArray * paths = NSSearchPathForDirectoriesInDomains (NSDocumentDirectory, NSUserDomainMask, YES); NSString * documents = [paths objectAtIndex: 0]; NSLog (@ "-- documents -- % @", documents); // Add, make it a complete path database_path = [documents stringByAppendingPathComponent: DBNAME]; NSLog (@ "-- database_path -- -% @ ", Database_path); db = [FMDatabase databaseWithPath: database_path];} // initialize the user interface-(void) addView {// create a database UIButton * createBtn = [UIButton buttonWithType: UIButtonTypeRoundedRect]; createBtn. frame = CGRectMake (60, 60,200, 50); [createBtn addTarget: self action: @ selector (doClickCreateButton) forControlEvents: UIControlEventTouchUpInside]; [createBtn setTitle: @ "createTable" forState: UIControlStateNormal]; [s Elf. view addSubview: createBtn]; // Insert the database UIButton * insterBtn = [UIButton buttonWithType: UIButtonTypeRoundedRect]; insterBtn. frame = CGRectMake (60,130,200, 50); [insterBtn addTarget: self action: @ selector (doClickInsertButton) forControlEvents: role]; [insterBtn setTitle: @ "insert" forState: UIControlStateNormal]; [self. view addSubview: insterBtn]; // update the database UIButton * updateBtn = [UIButto N buttonWithType: UIButtonTypeRoundedRect]; updateBtn. frame = CGRectMake (60,200,200, 50); [updateBtn addTarget: self action: @ selector (doClickUpdateButton) forControlEvents: Events]; [updateBtn setTitle: @ "update" forState: UIControlStateNormal]; [self. view addSubview: updateBtn]; // Delete the database UIButton * deleteBtn = [UIButton buttonWithType: UIButtonTypeRoundedRect]; deleteBtn. frame = CGRectMak E (60,270,200, 50); [deleteBtn addTarget: self action: @ selector (doClickDeleteButton) forControlEvents: UIControlEventTouchUpInside]; [deleteBtn setTitle: @ "delete" forState: UIControlStateNormal]; [self. view addSubview: deleteBtn]; // view the database UIButton * selectBtn = [UIButton buttonWithType: UIButtonTypeRoundedRect]; selectBtn. frame = CGRectMake (60,340,200, 50); [selectBtn addTarget: self action: @ selector (doCl IckSelectButton) forControlEvents: UIControlEventTouchUpInside]; [selectBtn setTitle: @ "select" forState: UIControlStateNormal]; [self. view addSubview: selectBtn]; // multithreading UIButton * multithreadBtn = [UIButton buttonWithType: UIButtonTypeRoundedRect]; multithreadBtn. frame = CGRectMake (60,410,200, 50); [multithreadBtn addTarget: self action: @ selector (doClickMultithreadButton) forControlEvents: UIControlEventTo UchUpInside]; [multithreadBtn setTitle: @ "multithread" forState: UIControlStateNormal]; [self. view addSubview: multithreadBtn] ;}# pragma-mark-doClickAction // create a database-(void) doClickCreateButton {// SQL statement if ([db open]) {NSString * sqlCreateTable = [NSString stringWithFormat: @ "create table if not exists '% @' ('% @ 'integer primary key autoincrement,' % @ 'TEXT, '% @ 'integer,' % @ 'text) ", TABLENAME, ID, NAME, AGE, ADDRESS]; BOOL res = [db executeUpdate: sqlCreateTable]; if (! Res) {NSLog (@ "error when creating db table");} else {NSLog (@ "success to creating db table");} [db close];} // INSERT database-(void) doClickInsertButton {if ([db open]) {NSString * insertSql1 = [NSString stringWithFormat: @ "insert into '% @' ('% @', '% @', '% @') VALUES ('% @', '% @', '% @') ", TABLENAME, NAME, AGE, ADDRESS, @ "James", @ "13", @ "Jinan"]; BOOL res = [db executeUpdate: insertSql1]; if (! Res) {NSLog (@ "error when insert db table");} else {NSLog (@ "success to insert db table");} NSString * insertSql2 = [NSString stringWithFormat: @ "insert into '% @' ('% @', '% @', '% @') VALUES ('% @', '% @', '% @') ", TABLENAME, NAME, AGE, ADDRESS, @" Li Si ", @" 12 ", @" Jinan "]; BOOL res2 = [db executeUpdate: insertSql2]; if (! Res2) {NSLog (@ "error when insert db table");} else {NSLog (@ "success to insert db table");} [db close];} // modify the database-(void) doClickUpdateButton {if ([db open]) {NSString * updateSql = [NSString stringWithFormat: @ "UPDATE '% @ 'set' % @' % = '% @ 'where' % @' = '% @'", TABLENAME, AGE, @ "15", AGE, @ "13"]; BOOL res = [db executeUpdate: updateSql]; if (! Res) {NSLog (@ "error when update db table");} else {NSLog (@ "success to update db table");} [db close];} // Delete the database-(void) doClickDeleteButton {if ([db open]) {NSString * deleteSql = [NSString stringWithFormat: @ "delete from % @ where % @ = '% @'", TABLENAME, NAME, @ "James"]; BOOL res = [db executeUpdate: deleteSql]; if (! Res) {NSLog (@ "error when delete db table");} else {NSLog (@ "success to delete db table");} [db close];} // view database-(void) doClickSelectButton {if ([db open]) {NSString * SQL = [NSString stringWithFormat: @ "SELECT * FROM % @", TABLENAME]; FMResultSet * rs = [db executeQuery: SQL]; while ([rs next]) {int Id = [rs intForColumn: ID]; NSString * name = [rs stringForColumn: NAME]; NSString * age = [rs stri NgForColumn: AGE]; NSString * address = [rs stringForColumn: ADDRESS]; NSLog (@ "id = % d, name = % @, age = % @ address = % @", id, name, age, address);} [db close] ;}// multi-threaded operation database-(void) doClickMultithreadButton {FMDatabaseQueue * queue = [FMDatabaseQueue databaseQueueWithPath: database_path]; dispatch_queue_t q1 = dispatch_queue_create ("queue1", NULL); dispatch_queue_t q2 = dispatch_queue_create ("queue2 ", NULL); dispatch_async (q1, ^ {for (int I = 0; I <50; ++ I) {[queue inDatabase: ^ (FMDatabase * db2) {NSString * insertSql1 = [NSString stringWithFormat: @ "insert into '% @' ('% @', '% @', '% @') VALUES (?, ?, ?) ", TABLENAME, NAME, AGE, ADDRESS]; NSString * name = [NSString stringWithFormat: @" jack % d ", I]; NSString * age = [NSString stringWithFormat: @ "% d", 10 + I]; BOOL res = [db2 executeUpdate: insertSql1, name, age, @ "Jinan"]; if (! Res) {NSLog (@ "error to inster data: % @", name);} else {NSLog (@ "succ to inster data: % @", name) ;}}] ;}}); dispatch_async (q2, ^ {for (int I = 0; I <50; ++ I) {[queue inDatabase: ^ (FMDatabase * db2) {NSString * insertSql2 = [NSString stringWithFormat: @ "insert into '% @' ('% @', '% @', '% @') VALUES (?, ?, ?) ", TABLENAME, NAME, AGE, ADDRESS]; NSString * name = [NSString stringWithFormat: @" lilei % d ", I]; NSString * age = [NSString stringWithFormat: @ "% d", 10 + I]; BOOL res = [db2 executeUpdate: insertSql2, name, age, @ "Beijing"]; if (! Res) {NSLog (@ "error to inster data: % @", name);} else {NSLog (@ "succ to inster data: % @", name) ;}}] ;}}) ;}- (void) didReceiveMemoryWarning {[super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated .} @ end