在视图中拉出最新版本的数据库

Question

我正在尝试根据FMDB数据库创建一个收藏夹表。按下另一个屏幕上的按钮会在数据库中注册更改，但必须重新加载应用程序才能使收藏页面更新最新的添加。有没有更好的地方这样做，以便收藏页面自动反映数据库更改？下面是我用来在收藏夹视图控制器中调用DB的代码。

    dirPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); // Get the documents directory

docsDir = dirPaths[0];

NSString *path = [[NSString alloc] initWithString: [docsDir stringByAppendingPathComponent: @"passages.db"]];

FMDatabase *database = [FMDatabase databaseWithPath:path];
[database open];

FMResultSet *results = [database executeQuery:@"SELECT * FROM passages WHERE favorite=1"];
NSMutableArray *favorites = [[NSMutableArray alloc] init];
while ([results next]){
    NSMutableDictionary *pass = [[NSMutableDictionary alloc]init];
    [pass setObject:[results stringForColumn: @"thing1"] forKey:@"thing1"];
    [pass setObject:[results stringForColumn: @"thing2"] forKey:@"thing2"];
    [pass setObject:[results stringForColumn: @"thing3"] forKey:@"thing3"];

    [favorites addObject:pass];
}
[results close];
[database close];