Questions tagged [customstringconvertible]
16 questions
125
votes
4 answers
Swift equivalent of Java toString()
What is the Swift equivalent of Java toString() to print the state of a class instance?
Marcus Leon
- 55,199
- 118
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- 429
6
votes
1 answer
Why is accessing CustomStringConvertible’s description discouraged?
Apple’s docs for CustomStringConvertible say:
Accessing a type’s description property directly […] is discouraged.
Why?
Below is an example where using description seems useful to me. How would I get the same results otherwise?
func…
Philippe-André Lorin
- 994
- 7
- 25
1
vote
1 answer
Is it possible to change Swift String Interpolation for the String typealias?
I have a lot of DTOs in my app which log some field. That field should not be logged because the data is kind of sensitive.
The model looks like this:
typealias HiddenFieldType = String
struct DTO1 {
var field1_1: String
var fieldToHide:…
olha
- 2,132
- 1
- 18
- 39
1
vote
1 answer
How to make a reusable view accept generic types
I created a reusable control to be used in a project I'm working on. It's just a UITextField which shows a UIPickerView as its inputView.
class InputPickerView: UIView {
@IBOutlet private var view: UIView!
@IBOutlet weak private var…
Isuru
- 30,617
- 60
- 187
- 303
1
vote
0 answers
Automatically generate a CustomStringConvertible implementation for any Object
I have to write a lot of code like this:
extension MyData: CustomStringConvertible {
public var description: String {
return "x: \(x), y: \(y), z: \(z)"
}
}
Is there a good way to automatically synthesise this repetitive code?
scrrr
- 5,135
- 7
- 42
- 52
1
vote
3 answers
When and why would i use Protocols in Swift?
So I came across the subject of protocols and I have searched the internet a bunch for an answer but I couldn't find one, atleast one that solved my problem.
So I understand that Protocols are a "blueprint" of methods, properties and such and that…
Dutchveteran
- 73
- 1
- 4
1
vote
2 answers
Is there a way to simplify this 'matrix of overloads' based on argument types which are all ultimately representable by a specific type?
We're trying to create a function addQueryItem which ultimately uses a string and an optional string internally.
For more flexibility in the API, rather than use String for the argument types, we are instead using CustomStringConvertible (which…
Mark A. Donohoe
- 28,442
- 25
- 137
- 286
1
vote
2 answers
Using CustomStringConvertible in UITableView
I've declared the following:
class Song: CustomStringConvertible {
let title: String
let artist: String
init(title: String, artist: String) {
self.title = title
self.artist = artist
}
var description: String {
…
Jacob Cavin
- 2,169
- 3
- 19
- 47
1
vote
1 answer
Why CustomStringConvertible protocol description being called multiple times?
I have written a struct in iOS playground and want to customize the print format of it.
struct Point {
let x: Int, y: Int
}
extension Point: CustomStringConvertible {
var description: String {
switch (x, y) {
case let (x,…
shoujs
- 1,113
- 1
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- 24
0
votes
3 answers
Swift iOS Formatting data from JSON codable / API with CustomStringConvertible
I have some JSON that I would like to reformat before use, preferably in an initializer (or extension ??)
[
{
"name": "Diesel",
"id": "1",
"maj": "2022-07-06 18:28:29",
"value": "2.81"
},
{
"name": "SP95",
"id": "5",
"maj": "2022-07-06…
jat
- 183
- 3
- 14
0
votes
1 answer
Swift equivalent of Haskell Show
What is the Swift equivalent of Haskell Show to print values inside Enumerations with cases? I have read Show is pretty similar to the Java toString() method and that the Swift CustomStringConvertible maybe a good option.
For example, using print on…
stcol
- 131
- 1
- 11
0
votes
0 answers
as.POSIXct sometimes could not convert
Please see the following example: some values could not be translated by as.POSIXct
as.POSIXct("2019-03-21T07:51:41.521Z")
as.POSIXct("2019-03-22T05:35:47.824Z")
The first is working, however, the second one did not work what is the difference!
MeY
- 1
0
votes
1 answer
How to resolve overlapping conformances of CustomStringConvertible
Based on this article by John Sundell I have following struct:
protocol Identifiable {
associatedtype RawIdentifier: Codable, Hashable = String
var id: Identifier { get }
}
struct Identifier: Hashable {
let…
Adam Bardon
- 3,829
- 7
- 38
- 73
0
votes
1 answer
Override URL description
Originally I tried to use something like this:
extension URL: CustomStringConvertible{
public override var description: String {
let url = self
return url.path.removingPercentEncoding ?? ""
}
}
After fixing compiler…
Shmidt
- 16,436
- 18
- 88
- 136
0
votes
1 answer
CustomStringConvertible in enum
I have following enum in a class.
enum Attributes: String, CustomStringConvertible {
case eventDate
case eventName
case eventType
case country
var description: String {
return self.rawValue
}
}
When I try have the…
Ham Dong Kyun
- 756
- 4
- 28