Why do i see 'type 'x' has no member 'y' error in swift?

This error indicates you're trying to access a member (like a property or method) that doesn't exist for a given type. Example:

struct Car {}
let myCar = Car()
print(myCar.wheels)
Solution:

struct Car {
    var wheels = 4
}
let myCar = Car()
print(myCar.wheels)
Always ensure the member exists for the datatype you're working with.

Beginner's Guide to Swift