How to check for type in Swift

Question

I have the following code where I want to check for the type of error instance.

if let error = error {
    // error is Error
    if error is CMErrorMotionActivityNotAuthorized {

    }                        
}

It is giving me error that CMErrorMotionActivityNotAuthorized is not a type. How can I check that if the error is of type CMErrorMotionActivityNotAuthorized

Is this what you are looking for: https://developer.apple.com/documentation/swift/2885064-type — , Oct 03 '19 at 17:31
Possible duplicate of [How do you find out the type of an object (in Swift)?](https://stackoverflow.com/questions/24101450/how-do-you-find-out-the-type-of-an-object-in-swift) — , Oct 03 '19 at 17:32
`error` can never be `CMErrorMotionActivityNotAuthorized`, because `CMError` is not a Swift `Error`. Can you explain what you are trying to do? You should also provide some more code. — Sweeper, Oct 03 '19 at 17:36
I am trying to check for pedometer error if the error is thrown due to unauthorized — john doe, Oct 03 '19 at 17:37

score 3 · Accepted Answer · answered Oct 03 '19 at 17:39

3

Try this:

if error as? CMError == CMErrorMotionActivityNotAuthorized {
    // handle the error
}

answered Oct 03 '19 at 17:39

Yonat

4,382
2
28
37

this gives an unrelated type warning – Hogdotmac Sep 21 '21 at 10:43

score 0 · Answer 2 · answered Oct 03 '19 at 19:11

You can either try this

But CMErrorMotionActivityNotAuthorized means that the app is not currently authorized to use motion activity support. Required: var CMErrorMotionActivityNotAuthorized: CMError { get }

To learn more on this you can check iOS - is Motion Activity Enabled in Settings > Privacy > Motion Activity on Stackoverflow , here is the link

How to check for type in Swift

2 Answers2