我总是使用这段代码在我的 iPhone 应用程序中打开一个 sqlite 数据库，但现在使用 iOS6，这段代码不起作用。功能： sqlite3_prepare_v2 失败，但我不明白为什么！
我也不明白为什么如果我尝试用另一个不存在文件的名称更改 sqlite db 的名称：“gamer.sqlite”，函数：'sqlite3_open' 再次返回 SQLITE_OK 值。
这是我的代码：
-(NSMutableArray*)view_table
{
const char *sql;
NSMutableArray *content=[[NSMutableArray alloc] initWithObjects:nil];
[self msgbox:@"eseguo"];
/*elementi da visualizzare nella tabella*/
if(sqlite3_open([databasePath UTF8String],&database)==SQLITE_OK)
{
[self msgbox:@"opened"];
sql = "SELECT * FROM list_gamer";
if (sqlite3_prepare_v2(database,sql, -1, &selectstmt, NULL) == SQLITE_OK)
{
[self msgbox:@"query eseguita"];
while(sqlite3_step(selectstmt) == SQLITE_ROW)
{
[content addObject:[NSString stringWithFormat:@"%s",sqlite3_column_text(selectstmt,0)]];
}
}
}
return content;
}
- (void)viewDidLoad{
NSArray *documentPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDir = [documentPaths objectAtIndex:0];
databasePath = [[documentsDir stringByAppendingPathComponent:@"gamer.sqlite"] copy];
if(![[NSFileManager defaultManager] fileExistsAtPath:databasePath])
{
NSFileManager *fileManager = [NSFileManager defaultManager];
int success = [fileManager fileExistsAtPath:databasePath];
if(success)
{
[fileManager removeItemAtPath:databasePath error:nil];
return;
}
NSString *databasePathFromApp = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:@"gamer.sqlite"];
// Copy the database from the package to the users filesystem
[fileManager copyItemAtPath:databasePathFromApp toPath:databasePath error:nil];
documentPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
documentsDir = [documentPaths objectAtIndex:0];
}
[super viewDidLoad];
}
- (void)didReceiveMemoryWarning{
[super didReceiveMemoryWarning];
}
-(IBAction)start_game:(id)sender{
self.view=frmgame;
[self view_table];
}