Editor placeholder in source file swift ошибка

When you insert code via autocompletion (or via a code snippet, sometimes), there may be placeholders — blue rectangles that describe what you should put there instead. You can click on a placeholder to select it, then type your actual code.

For example (I’m guessing) when you typed «UIView(«, you inserted a complete call, but with a «CGRect» placeholder where the rect was supposed to go. If you put the rect parameters after the placeholder without replacing it, you’d get this error message. You should have replaced the placeholder, not used it as code.

If that’s what happened, you don’t have to actually retype it in this case. If you double-click on a placeholder (or select it and press Enter), it will change to regular text.

When you insert code via autocompletion (or via a code snippet, sometimes), there may be placeholders — blue rectangles that describe what you should put there instead. You can click on a placeholder to select it, then type your actual code.

For example (I’m guessing) when you typed «UIView(«, you inserted a complete call, but with a «CGRect» placeholder where the rect was supposed to go. If you put the rect parameters after the placeholder without replacing it, you’d get this error message. You should have replaced the placeholder, not used it as code.

If that’s what happened, you don’t have to actually retype it in this case. If you double-click on a placeholder (or select it and press Enter), it will change to regular text.

That’s exactly what I did by the looks of it. I’ve double-clicked and its changed and given me the rectangle I needed. Thanks!

Command + Shift + b
It works perfectly… I have already done this for tableView

In addition to the solution offered by Quincey Morris, if you can’t find said placeholder, try closing and reopening your project, or even Xcode.

Thank you @Anam098 it worked.

1

Cmd+Opt+Shift+K - очистить и после этого перебилдить Cmd-B

→ Ссылка

Solution 4

Go to Product > Clean Build Folder

Solution 5

Error is straight forward and its because of wrong placeholders you have used in function call. Inside init you are not passing any parameters to your function. It should be this way

destination = Node("some key", neighbors: [edge1 , edge2], visited: true, lat: 23.45, long: 45.67) // fill up with your dummy values

Or you can just initialise with default method

destination = Node()

UPDATE

Add empty initialiser in your Node class

init() {

}

Comments

• Hello I am implementing a graph data structure. When I try to build the application the I get the error «Editor placeholder in source file»

  The full graph implementation was pulled from WayneBishop’s GitHub from here https://github.com/waynewbishop/SwiftStructures

  class Path {
  
  var total: Int!
  var destination: Node
  var previous: Path!
  
  init(){
      //Error happens on next line
      destination = Node(key: String?, neighbors: [Edge!], visited: Bool, lat: Double, long: Double)
       }
  }
  

  I changed the Node Class around to:

  public class Node{
  
  var key: String?
  var neighbors: [Edge!]
  var visited: Bool = false
  var lat: Double
  var long: Double
  
  init(key: String?, neighbors: [Edge!], visited: Bool, lat: Double, long: Double) {
      self.neighbors = [Edge!]()
       }
  
  }
  

  This Error happens 5 times throughout the code that I have built so far. Also this question has been asked, but not answered.

  I think the error may be due to my changes to the init() in the Node class. Prior to my changes it was just init(). If it is, how can I add objects to the class? Pardon me if I am not correct in my programming terminology, as I am relatively new to OOP.

• so dummy values need to be placed in the initializer in order for them to compile?

• Its not dummy value, you need to initialise with data available with you at that time. If not you can pass empty data. Else use second way around to initialise

• I tried that and it returns an error «Cannot Invoke Initializer for Type ‘Node’ with no arguments`

• returns error Initializer does not override a designated initializer from its superclass……Could this have anything to do with Inheritance? Maybe move the destination to another file/class?

• okay I added an empty initializer, but it errors out with «Return from initializer without initializing all stored properties» unless I fill in dummy values for the variables. Do I need to keep it that way? If so, how do I add a new object?

• You can set which ever data is available at that point of time. To remove that error, declare your vars optional i.e var neighbors: [String!]! var lat: Double! var long: Double!

• So with this, how can I add a new object? Right now I cannot say var hello = Node(key: «hey»…). is it through overrides?

• I found cut/paste didnt work sufficiently, but rebuilding did the trick. Product -> Build Clean Folder, Product -> Build

• Cut and pasting the line on same line silenced «Editor placeholder in source file». The error started after I paste a middle sized block of code.

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