在iPhone中创建数据库副本

“用于创建数据库的副本…”

BOOL success;NSFileManager *fileManager = [NSFileManager defaultManager];NSError *error;NSArray *paths = NSSearchPathForDirectoriesInDomains(NSdocumentDirectory, NSUserDomainMask, YES);NSString *documentPath = [paths objectAtIndex:0];NSString *finalPath = [documentPath stringByAppendingPathComponent:@"test.sqlite"];success = [fileManager fileExistsAtPath:finalPath];if(success){    NSLog(@"Database Already Created.");    return;}NSString *defaultPath = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:@"test.sqlite"];success = [fileManager copyItemAtPath:defaultPath toPath:finalPath error:&error];if(success){    NSLog(@"Database Created Successfully.");}

“对于打开该数据库…”

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSdocumentDirectory, NSUserDomainMask, YES);NSString *documentPath = [paths objectAtIndex:0];NSString *finalPath = [documentPath stringByAppendingPathComponent:@"test.sqlite"];if(sqlite3_open([finalPath UTF8String], &database) != SQLITE_OK){    sqlite3_close(database);    NSLog(@"Error to Open Database :- %s",sqlite3_errmsg(database));}

“用于在应用程序路径中创建文件夹”

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSdocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; // Get documents folderNSString *dataPath = [documentsDirectory stringByAppendingPathComponent:@"/FolderName"];if (![[NSFileManager defaultManager] fileExistsAtPath:dataPath]){     [[NSFileManager defaultManager] createDirectoryAtPath:dataPath withIntermediateDirectories:NO attributes:nil error:&error];}

“用于在应用程序中复制文件和文件夹”

NSFileManager *fileManager = [NSFileManager defaultManager];NSError *error;NSArray *paths = NSSearchPathForDirectoriesInDomains(NSdocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; // Get documents folderNSString *dataPath = [documentsDirectory stringByAppendingPathComponent:@"/FolderName"];if (![[NSFileManager defaultManager] fileExistsAtPath:dataPath]){    BOOL successs;    NSString *defaultPath = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:@"Files/FolderName"];    successs  = [[NSFileManager defaultManager] fileExistsAtPath:defaultPath];    if(successs)    {        NSLog(@"TRUE");        NSString *strFile = [NSString stringWithFormat:@"%@",dataPath];        NSLog(@"File :- '%@'",strFile);        [fileManager copyItemAtPath:defaultPath toPath:strFile error:&error];    }    else        NSLog(@"FALSE");}