Fast dynamic property setting based on array keys
I know of a few pre-existing questions that seem curious to cover what I'm asking (e.g. Dynamically setting properties from a <String, Any?> Dictionary in Swift ), but that doesn't sound like what I'm looking for.
Basically, I have a base object where I want to set properties based on the object, for example:
init(data: Dictionary<String,String>)
{
for (key, value) in data
{
//TODO set property as value here?
}
}
I want to be able to pass a dictionary in keys / values and add them dynamically as properties of an object. I know this behavior is possible in PHP, for example by doing $this->{$key} = $value
, but I'm a bit unfamiliar with Swift so I haven't been able to figure out how to do this yet.
Also, if anyone can tell me the name of the function I am trying to achieve here, that would be very helpful. Not knowing what is called this concept makes it difficult to find answers: c
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I want to expand on the example given by @Okapi. If your class is a subclass of NSObject , then the setValue: forKey: and valueForKey: methods are present by default . Thus, you can simply set your properties using the following code,
class Foo: NSObject {
var x:String=""
var y:String=""
var z:String=""
init(data: Dictionary<String,String>) {
super.init()
for (key,value) in data {
self.setValue(value, forKey: key)
}
}
}
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In a define object (or override) setValue:forKey:
, then call it from the init method like this:
class Foo {
var x:String=""
var y:String=""
var z:String=""
init(data: Dictionary<String,String>) {
for (key,value) in data {
self.setValue(value, forKey: key)
}
}
func setValue(value: AnyObject?, forKey key: String) {
switch key {
case "x" where value is String:
self.x=value as String
case "y" where value is String:
self.y=value as String
case "z" where value is String:
self.z=value as String
default:
//super.setValue(value, forKey: key)
return
}
}
}
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