Question

我在我的iOS开发中使用SQLite数据库（firefox addon）。我手动将数据插入我的数据库。但第一次运行程序，显示数据。但在手动将数据再次插入数据库后数据未显示。我是ios开发的初学者。贝娄有我的数据库连接。请帮忙。

- (void)viewDidLoad
{
    NSString *defaultDBPath;
    NSFileManager *fileManager = [NSFileManager defaultManager];
    NSError *error;
    NSString *ddPath = [self getDBPath];
    BOOL success = [fileManager fileExistsAtPath:ddPath];

    if(!success) {

        defaultDBPath = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:@"AddressBook.sqlite"];
        success = [fileManager copyItemAtPath:defaultDBPath toPath:ddPath error:&error];

        if (!success)
            NSAssert1(0, @"Failed to create writable database file with message '%@'.", [error localizedDescription]);
    }

   // const char *dbpath=[ddPath UTF8String];
    const char *dbpath1=[ddPath UTF8String];
    sqlite3_stmt *statement;
     NSMutableArray  *company =[[NSMutableArray alloc]init];

    if (sqlite3_open(dbpath1, &contactDB)==SQLITE_OK)
    {
        NSString *querySQL=[NSString stringWithFormat:@"SELECT CompanyName FROM tblCompany order by CompanyName"];

        const char *query_stmt=[querySQL UTF8String];

        if (sqlite3_prepare_v2(contactDB, query_stmt, -1, &statement, NULL)==SQLITE_OK)
        {
            int i=0;
            while(sqlite3_step(statement)==SQLITE_ROW)
            {
                NSString *my=[[NSString alloc]initWithUTF8String:(const char*)sqlite3_column_text(statement, 0)];
                NSLog(@"name %@",my);


               [company insertObject:my atIndex:i];
               i=i+1;
                companyDetails=[NSDictionary dictionaryWithContentsOfFile:my];

               // [[cell textlabel] setText:my];
            }
            companies =company;
            companyKey=[companyDetails allKeys];
            sqlite3_finalize(statement);
        }
        else
            NSLog(@"Not connected");
        sqlite3_close(contactDB);
    }

Getdatabase路径方法::

- (NSString *) getDBPath {
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory , NSUserDomainMask, YES);
    NSString *documentsDir = [paths objectAtIndex:0];
    return [documentsDir stringByAppendingPathComponent:@"Address.sqlite"];
}

我试过这些但是我的iOS应用程序中没有显示更新的数据库数据。请给我一个解决方案。

Answer 1

你不检查项目文件夹中的.sqlite文件，检查这样的文件路径

/Users/username/Library/Application Support/iPhone Simulator/5.0/Applications/4F4574E2-AD8A-493E-9B16-2D456AFAEB6C/Documents/your file.sqlite 

//username - your user name
//4F4574E2-AD8A-493E-9B16-2D456AFAEB6C  -it changed for projects

它没有在目标c中手动显示更新的数据库

1 个答案: