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Document how to store a dictionary of arbitrary values 

Fixes #36
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Sindre Sorhus 2020-04-13 13:39:25 +08:00
parent 8376ca7f51
commit 77c05abe10
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readme.md
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@ -489,6 +489,30 @@ The effects of any call to `tieToLifetime(of:)` are reversed. Note however that
## FAQ ## FAQ
### How can I store a dictionary of arbitrary values?
You cannot store `[String: Any]` directly as it cannot conform to `Codable`. However, you can use the [`AnyCodable`](https://github.com/Flight-School/AnyCodable) package to work around this `Codable` limitation:
```swift
import AnyCodable
extension Defaults.Keys {
static let magic = Key<[String: AnyCodable]>("magic", default: [:])
}
// …
Defaults[.magic]["unicorn"] = "🦄"
if let value = Defaults[.magic]["unicorn"]?.value {
print(value)
//=> "🦄"
}
Defaults[.magic]["number"] = 3
Defaults[.magic]["boolean"] = true
```
### How is this different from [`SwiftyUserDefaults`](https://github.com/radex/SwiftyUserDefaults)? ### How is this different from [`SwiftyUserDefaults`](https://github.com/radex/SwiftyUserDefaults)?
It's inspired by that package and other solutions. The main difference is that this module doesn't hardcode the default values and comes with Codable support. It's inspired by that package and other solutions. The main difference is that this module doesn't hardcode the default values and comes with Codable support.