I recently moved from Objective-C to Swift, and I'm having an issue with the following example:
var test: [[String: AnyObject]] = [["value": true]]
var aaa: [String: AnyObject] = test[0]
print(aaa["value"]) // prints Optional(1)
aaa["value"] = false
print(aaa["value"]) // prints Optional(0)
var bbb: [String: AnyObject] = test[0]
print(bbb["value"]) // prints Optional(1) again???
How come the change is not stored in the test array?
Thank you.
Swift Dictionary is value type not reference type so you need to set it that dictionary with array after making changes.
var test: [[String: AnyObject]] = [["value": true]]
var aaa: [String: AnyObject] = test[0]
print(aaa["value"]) // prints Optional(1)
aaa["value"] = false
print(aaa["value"]) // prints Optional(0)
//Replace old dictionary with new one
test[0] = aaa
var bbb: [String: AnyObject] = test[0]
print(bbb["value"]) // prints Optional(0)
Or You can try simply this way:
test[0]["value"] = false
[[true], [true]] ?
array[0][1] = false No need to first extract value and set it and then replace object in array.directly change from main array
test[0]["value"] = false
