iphone - SQLite 问题 : sqlite3_open([databasePath UTF8String], &database) == SQLITE_OK) 不工作

Question

-(void)myDatabaseFunction
{   
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,  NSUserDomainMask, YES); 
NSString *documentsDirectory = [paths objectAtIndex:0]; 
NSString *writableDBPath = [documentsDirectory stringByAppendingPathComponent:@"HHAuditToolDatabase.sqlite"];
if (sqlite3_open([writableDBPath UTF8String], &database) == SQLITE_OK){
NSLog(@"opening db");
NSString *keyValue;
NSString *sqlStr = @"SELECT * FROM HHAuditTable";
//following if() not working dude!!!!
//its working with !=SQLITE_OK      
if(sqlite3_open([databasePath UTF8String], &database) == SQLITE_OK) {

sqlite3_stmt *addStmt = nil;

if(sqlite3_prepare_v2(database,[sqlStr UTF8String], -1, &addStmt, NULL) != SQLITE_OK){
    NSLog(@"%@",sqlStr);
    while (sqlite3_step(addStmt) == SQLITE_ROW) {


const unsigned char *querry_returns = sqlite3_column_text(addStmt, 0);
        keyValue = [[NSString alloc]initWithUTF8String:(char *) sqlite3_column_text(addStmt, 0)];
        }

        NSLog(@"value from DB = %@",keyValue);

带注释的 if() 不起作用....有些有治愈方法!!!我已经用了 3 个小时了....请想出一个解决方案

Answer 1

您正在打开数据库两次。您应该必须关闭数据库连接，然后必须再次打开数据库。这就是它不起作用的原因。