Question

我已将自定义视图设置为import Pipes import qualified Pipes.Prelude as P import Pipes.ByteString as PB import qualified Pipes.Group as PG import Pipes.GZip import qualified Data.ByteString.Internal as BS (c2w, w2c) import System.IO import Lens.Simple (view) -- or Control.Lens or whatever import Data.Monoid main = run >>= mapM_ print myPipe fileHandle = P.toListM $ accumLines (decompress fileProducer) where fileProducer = PB.fromHandle fileHandle run = do dat <- withFile "a.gz" ReadMode myPipe pure dat -- little library additions accumLines :: Monad m => Producer ByteString m r -> Producer ByteString m r accumLines = mconcats . view PB.lines accumSplits :: Monad m => Char -> Producer ByteString m r -> Producer ByteString m r accumSplits c = mconcats . view (PB.splits (BS.c2w c)) -- this is convenient, but the operations above could -- be more rationally implemented using e.g. BL.fromChunks and toListM mconcats :: (Monad m, Monoid b) => FreeT (Producer b m) m r -> Producer b m r mconcats = PG.folds (<>) mempty id的{{1}} 并启用了编辑模式。

现在当它切换到编辑模式时，叠加视图仍然存在。如何从编辑视图中删除它？

我在官方文档中找不到与此相关的任何内容。

Answer 1

您是否尝试过 view.removeFromSuperview ？

我认为你已经实现了委托功能

if(isset($_POST)){
    if($array){
        $doc = $collection->update(
            array(
                '$set' => array(
                    '_id' => new MongoId(),
                    'organization' => $mysql_org_name,
                    'purch_code' => $mysql_purch_code,
                    'contentname' => $mysql_order_item_name,
                    array('upsert' => true)
                )
            )
        );
    }
}

这发生在调用该函数之前。

您的自定义视图是否可以检测到其父级已更改并自行删除？

如何从UIImagePickerController的编辑屏幕中删除cameraOverlayView？

1 个答案: