小编Sas*_*haZ的帖子

我有两个观点,我想做一个轻扫样式转换,我已经完成了当有一个segue行动,但我没有在这里,所以我不知道如何应用我的动画类.我班上的所有内容都是:

let stb = UIStoryboard(name: "Walkthrough", bundle: nil)
    let walkthrough = stb.instantiateViewControllerWithIdentifier("walk") as! BWWalkthroughViewController

self.presentViewController(walkthrough, animated: true, completion: nil)

我想申请申请以下自定义segue:

class CustomSegue: UIStoryboardSegue {

  override func perform() {
    // Assign the source and destination views to local variables.
    var firstVCView = self.sourceViewController.view as UIView!
    var secondVCView = self.destinationViewController.view as UIView!

    // Get the screen width and height.
    let screenWidth = UIScreen.mainScreen().bounds.size.width
    let screenHeight = UIScreen.mainScreen().bounds.size.height

    // Specify the initial position of the destination view.
    secondVCView.frame = CGRectMake(0.0, screenHeight, screenWidth, screenHeight) …

我有一个Bools数组,想要编辑一个Scores数组和一个Dates数组,其值为False.我无法理解.我想到了获取false的元素并使用该数组从score数组中删除这些元素,但我可以想象有一种直接的方法.

let hbiCompleteArray = [true, true, true, true, false, true, true, false, false]

let hbiScoreArray = [12, 12, 12, 12, 3, 13, 13, 2, 2]

我想要一个完整的HbiScores数组= [12,12,12,12,13,13]

我有一个疼痛贴图,我使用位置坐标来绘制疼痛的位置.我可以在for循环中添加"点",它们显示正常.但是,在我在for循环之外实例化它们之前,我无法删除它们.因此,每次我更新视图时,它都会绘制新视图而不是旧视图.我能做什么？

这个版本添加了很好的点,但我不能删除它们,因为我不能调用dot.removeFromSuperview()

DispatchQueue.global(qos: .background).async {
      if let locationNotNilX = self.painDiagramAnalysisModel.painLocationXFor(days: self.daysChosen){
        x = locationNotNilX
        count = locationNotNilX.count
      }

      if let locationNotNilY = self.painDiagramAnalysisModel.painLocationYFor(days: self.daysChosen){
        y = locationNotNilY
      }

      let locationsArray = zip(x, y)
      print("zipped array \(locationsArray)")
      DispatchQueue.main.async {
        let dot = UIImageView()
        dot.removeFromSuperview()
        dot.image = nil
        for item in locationsArray {
          self.locationPainY = (diagramHeight * CGFloat(item.1)) + originY
          self.locationPainX = (diagramWidth * CGFloat(item.0)) + originX
          print(" locationX \(self.locationPainX) locationY  \(self.locationPainY)")
          dot.image = UIImage(named: "dot")
          dot.frame = CGRect(x: self.locationPainX - (dotDiameter …

我有一个变化的数组,我想找到一个元素的出现次数,但表示为百分比,例如:

var filteredArray = [1,2,4,5,2,1,2,1,5,5]

  var counts:[Int: Int] = [:]

  for item in zeroRemovedArray2 {
    counts[item] = (counts[item] ?? 0) + 1
  }

这给出了事件[1:3,2:3,3:0,4:1,5:3],但我希望有一个字典[1:0.3,2:0.3,3:0,4:0.1, 5:0.3]

我可以看到在某个循环中使用每个值的/.count但是无法弄明白.