didHighlightItemAtIndexPath无法按预期工作

时间：2015-11-06 18:47:25

标签： swift tvos apple-tv

关于 "com.github.scopt" %% "scopt" % "3.3.0" , "com.typesafe.akka" %% "akka-testkit" % "2.3.8" % "test", "com.typesafe.play" %% "play-test" % "2.3.8" % "test", "com.tinkerpop.gremlin" % "gremlin-java" % gremlinVersion, "com.tinkerpop" % "pipes" % gremlinVersion, "com.thinkaurelius.titan" % "titan-core" % titanVersion, "com.thinkaurelius.titan" % "titan-cassandra" % titanVersion, "com.thinkaurelius.titan" % "titan-berkeleyje" % titanVersion, "com.netaporter" %% "scala-uri" % "0.4.8", "com.github.nscala-time" %% "nscala-time" % "1.8.0", "com.mandubian" %% "play-json-zipper" % "1.2", "com.michaelpollmeier" %% "gremlin-scala" % "2.6.1", "com.ansvia.graph" %% "blueprints-scala" % "0.1.61-20150416-SNAPSHOT", "io.kanaka" %% "play-monadic-actions" % "1.0.1" exclude("com.typesafe.play", "play_2.11"), "org.scalaz" %% "scalaz-concurrent" % "7.0.6", "com.chuusai" %% "shapeless" % "2.3.0-SNAPSHOT", ("io.github.jto" %% "validation-json" % "1.0").exclude("org.tpolecat", "tut-core_2.11"), "org.parboiled" %% "parboiled" % "2.1.0", "com.typesafe.scala-logging" %% "scala-logging" % "3.1.0", "ch.qos.logback" % "logback-classic" % "1.1.2", "xxx.xxxxxxxxxx" %% "chuck" % "0.9.0-SNAPSHOT", "xxx.xxxxxxxxxx" %% "shed-graph" % "0.9.0-MOK-1848-SNAPSHOT" exclude("com.thinkaurelius.titan", "titan-core"), "io.circe" %% "circe-core" % "0.2.0-SNAPSHOT", "io.circe" %% "circe-generic" % "0.2.0-SNAPSHOT", "io.circe" %% "circe-jawn" % "0.2.0-SNAPSHOT" 我使用UICollectionViewDelegate以及didHighlightItemAtIndexPath

didSelectItemAtIndexPath按预期工作。也就是说，当我单击遥控器时，此代码将运行。

问题是didSelectItemAtIndexPath也在点击时运行，当名称显示此块仅在突出显示时运行。我错过了什么吗？

各个街区：

didHighlightItemAtIndexPath

额外备注

对于func collectionView(collectionView: UICollectionView, didHighlightItemAtIndexPath indexPath: NSIndexPath) { let node: XMLIndexer = self.xml!["ArrayOfVideo"]["Video"][indexPath.row] let title = (node["Title"].element?.text)! let date = (node["Date"].element?.text)!(node["SpeakerOrganization"].element?.text)! self._title.text = title self._date.text = date } func collectionView(collectionView: UICollectionView, didSelectItemAtIndexPath indexPath: NSIndexPath) { let node: XMLIndexer = self.xml!["ArrayOfVideo"]["Video"][indexPath.row] let videoUrl = (node["VideoURL"].element?.text)! self.playVideoByUrlString(videoUrl) } 我通过添加以下内容来获取单元格图像上的视差感觉：

UICollectionViewCell

解决方案

覆盖// self is a UICollectionViewCell // self.imageView is a UIImageView self.imageView.adjustsImageWhenAncestorFocused = true self.imageView.clipsToBounds = false 代理中的shouldUpdateFocusInContext

1 个答案:

答案 0 :(得分：3)

由于R version 3.2.2 (2015-08-14) Platform: x86_64-w64-mingw32/x64 (64-bit) Running under: Windows 7 x64 (build 7601) Service Pack 1 locale: [1] LC_COLLATE=Dutch_Netherlands.1252 LC_CTYPE=Dutch_Netherlands.1252 LC_MONETARY=Dutch_Netherlands.1252 LC_NUMERIC=C [5] LC_TIME=Dutch_Netherlands.1252 attached base packages: [1] parallel stats graphics grDevices utils datasets methods base other attached packages: [1] randomForest_4.6-12 e1071_1.6-7 caret_6.0-58 ggplot2_1.0.1 lattice_0.20-33 doParallel_1.0.10 iterators_1.0.8 [8] foreach_1.4.3 loaded via a namespace (and not attached): [1] Rcpp_0.12.1 magrittr_1.5 splines_3.2.2 MASS_7.3-44 munsell_0.4.2 colorspace_1.2-6 minqa_1.2.4 stringr_1.0.0 [9] car_2.1-0 plyr_1.8.3 tools_3.2.2 nnet_7.3-11 pbkrtest_0.4-2 grid_3.2.2 gtable_0.1.2 nlme_3.1-122 [17] mgcv_1.8-8 quantreg_5.19 snow_0.3-13 class_7.3-14 MatrixModels_0.4-1 lme4_1.1-10 digest_0.6.8 Matrix_1.2-2 [25] nloptr_1.0.4 reshape2_1.4.1 codetools_0.2-14 stringi_1.0-1 compiler_3.2.2 scales_0.3.0 stats4_3.2.2 SparseM_1.7 [33] proto_0.3-10 安排，

didHighlightItemAtIndexPath之前调用的方法didSelectItemAtIndexPath。每次触摸单元格时，它都会在您选择之前突出显示（出于视觉目的，我假设）。你可以通过这个例子看到它：

UICollectionView

当我触摸单元格输出

时 
func collectionView(collectionView: UICollectionView, didHighlightItemAtIndexPath indexPath: NSIndexPath) {
    print("highlight")
}

func collectionView(collectionView: UICollectionView, didSelectItemAtIndexPath indexPath: NSIndexPath) {
    print("select")
}

func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
    let cell = collectionView.dequeueReusableCellWithReuseIdentifier("Cell", forIndexPath: indexPath)
    let imageView = UIImageView(frame: CGRect(origin: CGPointZero, size: cell.frame.size))
    imageView.image = imageFromColor(UIColor.redColor(), size: cell.frame.size)
    imageView.highlightedImage = imageFromColor(UIColor.blueColor(), size: cell.frame.size)
    cell.addSubview(imageView)
    return cell
}

func imageFromColor(color: UIColor, size: CGSize) -> UIImage {
    let rect = CGRectMake(0, 0, size.width, size.height)
    UIGraphicsBeginImageContextWithOptions(size, false, 0)
    color.setFill()
    UIRectFill(rect)
    let image: UIImage = UIGraphicsGetImageFromCurrentImageContext()
    UIGraphicsEndImageContext()
    return image
}

如果您希望突出显示或选择细胞，请仅查看highlight select 方法UICollectionViewDelegate's，shouldHighlightItemAtIndexPath。您可以通过在shouldSelectItemAtIndexPath内查看indexPath来阻止选中突出显示的单元格。

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