Question

DBStockManager.h

#import <Foundation/Foundation.h>
#import <sqlite3.h>

@interface DBStockManager : NSObject

@property sqlite3 *databaseHandle;
@property NSString *databasePath;
@property NSString *databaseName;

-(void)initDatabase;
-(void)checkAndCreateDatabase;
-(void) insertintoDataBase;

@end

DBStockManger.m

#import "DBStockManager.h"

@implementation DBStockManager

static DBStockManager *_database;

@synthesize databasePath;
@synthesize databaseName;



-(void)initDatabase{

    databaseName=@"stock.db";
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0];
    databasePath = [documentsDirectory stringByAppendingPathComponent:databaseName];
    NSLog(@"%@",databasePath);
    [self checkAndCreateDatabase];
}

-(void)checkAndCreateDatabase{

    BOOL success;
    NSFileManager *fileManager=[NSFileManager defaultManager];
    success=[fileManager fileExistsAtPath:databasePath];
    if(success)
        return;
    NSString *databasePathFromApp=[[[NSBundle mainBundle]resourcePath] stringByAppendingString:databaseName];
    [fileManager copyItemAtPath:databasePathFromApp toPath:databasePath error:nil];
}

-(void) insertintoDataBase{

    sqlite3 *database;
    BOOL returnCode='YES';
    NSLog(@"Called insertdatabase");
    if(sqlite3_open([databasePath UTF8String], &database)==SQLITE_OK){
        NSLog(@"database opened");
        char *sqlstatment="insert into user_stock(user_name,user_password) values(?,?)";
        sqlite3_stmt *compiledStatment;
        if(sqlite3_prepare_v2(database, sqlstatment, -1, &compiledStatment, NULL)==SQLITE_OK){
            sqlite3_bind_text(compiledStatment, 1, "nimi", -1, SQLITE_TRANSIENT);
             sqlite3_bind_text(compiledStatment, 2, "anand", -1, SQLITE_TRANSIENT);
        }
        if(sqlite3_step(compiledStatment)!=SQLITE_DONE){
            NSLog(@"Error:%s",sqlite3_errmsg(database));
        }
    }

}



- (void)dealloc {
    sqlite3_close(_databaseHandle);

}

@end


ViewController.m

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    _dbManager = [[DBStockManager alloc]init];
    [_dbManager initDatabase];
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

- (IBAction)loginClicked:(id)sender {
    _dbManager.insertintoDataBase;

}
@end

我是使用sqlite3的ios app新手。我使用终端创建了stock.db文件。创建了一个表并在表中添加了几条记录。我试图在点击没有发生的按钮时将记录插入数据库。

这是将记录插入表user_Stock的代码。我总是得到错误错误：没有这样的表：user_stock。但我在数据库中有表。请告知如何继续。

数据库：

Last login: Thu Dec  1 13:00:25 on ttys003
thiyagarajans-MacBook-Pro:~ rajkumar$ ls
Applications    Downloads   Movies      Public      stock.sql
Desktop     IdeaProjects    Music       eclipse     student.db
Documents   Library     Pictures    stock.db
thiyagarajans-MacBook-Pro:~ rajkumar$ .databases
-bash: .databases: command not found
thiyagarajans-MacBook-Pro:~ rajkumar$ sqlite3
SQLite version 3.14.0 2016-07-26 15:17:14
Enter ".help" for usage hints.
Connected to a transient in-memory database.
Use ".open FILENAME" to reopen on a persistent database.
sqlite> .databases
seq  name             file                                                      
---  ---------------  ----------------------------------------------------------
0    main                                                                       
sqlite> .open stock.db
sqlite> select * from user_Stock;
1|nirmal|anand
2|nimi.hbk|kingkong@123
sqlite>

错误：没有这样的表ios sqlite3

0 个答案: