objective-c - 打开sqlite数据库时内存泄漏

Question

当我在 Instruments openDatabase 方法上运行导致泄漏时，从 didFinishLaunchingWithOptions 调用了以下方法。请建议我如何清除

- (NSString*)getdestinationPath {
    NSArray *pathsArray=NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES);
    NSString *doumentDirectoryPath=[pathsArray objectAtIndex:0];
    NSString *destinationPath=[doumentDirectoryPath stringByAppendingPathComponent:dataBaseName];
    NSLog(@"database path %@",destinationPath);
    return destinationPath;
}




- (void)chkAndCreateDatbase {
    NSFileManager *fileManger=[NSFileManager defaultManager];
    NSError *error;
    NSString *destinationPath=[self getdestinationPath];
    if ([fileManger fileExistsAtPath:destinationPath]){
        //NSLog(@"database localtion %@",destinationPath);
        return;
    }
    NSString *sourcePath=[[[NSBundle mainBundle] resourcePath]stringByAppendingPathComponent:dataBaseName];
    [fileManger copyItemAtPath:sourcePath toPath:destinationPath error:&error];
}





- (void)openDatabase {
    path=[self getdestinationPath];
    if (sqlite3_open([path UTF8String], &database)==SQLITE_OK) // here leak is showing
    {
        NSLog(@"dataBaseOpen");
    }
    else {
        sqlite3_close(database);
        NSLog(@"dataBaseNotOpen");  
    }   
}

Answer 1

你正在泄漏，因为你没有调用 sqlite3_close(database) 当你得到 SQLITE_OK 时。

if (sqlite3_open([path UTF8String], &database)==SQLITE_OK) 
{
    NSLog(@"dataBaseOpen");
    // leak happens here, do stuff then call sqlite3_close(database), or move it out of the if/else block.

}
else {
    sqlite3_close(database);
    NSLog(@"dataBaseNotOpen");  
}