【代碼筆記】iOS-FMDBDemo，筆記ios-fmdbdemo

【代碼筆記】iOS-FMDBDemo，筆記ios-fmdbdemo

一，。

二，工程圖。

三，代碼。

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.            //初始化資料庫存放目錄    [self addDocumentPath];    //初始化介面    [self addView];        [super viewDidLoad];}#pragma -mark -functions//初始化資料庫存放目錄-(void)addDocumentPath{    //獲得Documents目錄    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);    NSString *documents = [paths objectAtIndex:0];    NSLog(@"--documents--%@",documents);    //添加/號，使之變成一個完整的路徑    database_path = [documents stringByAppendingPathComponent:DBNAME];    NSLog(@"--database_path---%@",database_path);    db = [FMDatabase databaseWithPath:database_path];}//初始化使用者介面-(void)addView{     //建立資料庫    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];    [self.view addSubview:createBtn];        //插入資料庫    UIButton *insterBtn=[UIButton buttonWithType:UIButtonTypeRoundedRect];    insterBtn.frame=CGRectMake(60, 130, 200, 50);    [insterBtn addTarget:self action:@selector(doClickInsertButton) forControlEvents:UIControlEventTouchUpInside];    [insterBtn setTitle:@"insert" forState:UIControlStateNormal];    [self.view addSubview:insterBtn];        //更新資料庫    UIButton *updateBtn=[UIButton buttonWithType:UIButtonTypeRoundedRect];    updateBtn.frame=CGRectMake(60, 200, 200, 50);    [updateBtn addTarget:self action:@selector(doClickUpdateButton) forControlEvents:UIControlEventTouchUpInside];    [updateBtn setTitle:@"update" forState:UIControlStateNormal];    [self.view addSubview:updateBtn];        //刪除資料庫    UIButton *deleteBtn=[UIButton buttonWithType:UIButtonTypeRoundedRect];    deleteBtn.frame=CGRectMake(60, 270, 200, 50);    [deleteBtn addTarget:self action:@selector(doClickDeleteButton) forControlEvents:UIControlEventTouchUpInside];    [deleteBtn setTitle:@"delete" forState:UIControlStateNormal];    [self.view addSubview:deleteBtn];        //查看資料庫    UIButton *selectBtn=[UIButton buttonWithType:UIButtonTypeRoundedRect];    selectBtn.frame=CGRectMake(60, 340, 200, 50);    [selectBtn addTarget:self action:@selector(doClickSelectButton) forControlEvents:UIControlEventTouchUpInside];    [selectBtn setTitle:@"select" forState:UIControlStateNormal];    [self.view addSubview:selectBtn];        //多線程    UIButton *multithreadBtn=[UIButton buttonWithType:UIButtonTypeRoundedRect];    multithreadBtn.frame=CGRectMake(60, 410, 200, 50);    [multithreadBtn addTarget:self action:@selector(doClickMultithreadButton) forControlEvents:UIControlEventTouchUpInside];    [multithreadBtn setTitle:@"multithread" forState:UIControlStateNormal];    [self.view addSubview:multithreadBtn];        }#pragma -mark -doClickAction//建立資料庫- (void)doClickCreateButton{    //sql 語句    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];            }}//插入資料庫-(void)doClickInsertButton{    if ([db open]) {        NSString *insertSql1= [NSString stringWithFormat:                               @"INSERT INTO '%@' ('%@', '%@', '%@') VALUES ('%@', '%@', '%@')",                               TABLENAME, NAME, AGE, ADDRESS, @"張三", @"13", @"濟南"];        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, @"李四", @"12", @"濟南"];        BOOL res2 = [db executeUpdate:insertSql2];                if (!res2) {             NSLog(@"error when insert db table");        }else{             NSLog(@"success to insert db table");        }        [db close];            }    }//修改資料庫-(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];            }    }//刪除資料庫-(void)doClickDeleteButton{    if ([db open]) {                NSString *deleteSql = [NSString stringWithFormat:                               @"delete from %@ where %@ = '%@'",                               TABLENAME, NAME, @"張三"];        BOOL res = [db executeUpdate:deleteSql];        if (!res) {            NSLog(@"error when delete db table");        } else {            NSLog(@"success to delete db table");        }        [db close];            }    }//查看資料庫-(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 stringForColumn:AGE];            NSString * address = [rs stringForColumn:ADDRESS];            NSLog(@"id = %d, name = %@, age = %@  address = %@", Id, name, age, address);        }        [db close];    }}//多線程操作資料庫-(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,@"濟南"];                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,@"北京"];                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