CMSensorDataList enumeration in swift on ios11

Question

There are a number of discussions about enumerating through CMSensorDataList around, however, they all have the same example:

extension CMSensorDataList: SequenceType {
    public func generate() -> NSFastGenerator {
        return NSFastGenerator(self)
    }
}

Which doesn't work on ios11 for multiple reasons (NSFastGenerator doesn't exist, SequenceType has been renamed to Sequence).

How do I enumerate through a CMSensorDataList in modern swift?

Here is a Swift 3 version: https://stackoverflow.com/q/31101573/1187415 — Martin R, Sep 26 '17 at 03:17

score 0 · Answer 1 · answered May 09 '21 at 09:56

if swift 4 and 5 it will work

extension CMSensorDataList: Sequence {
    public typealias Iterator = NSFastEnumerationIterator
    public func makeIterator() -> NSFastEnumerationIterator {
        return NSFastEnumerationIterator(self)
    }
}

now you will need to do like blow

let rec = CMSensorRecorder() 
if let list = rec.accelerometerData(from: date1, to: date2) {
    for item in list {
        if let data = item as? CMRecordedAccelerometerData {
            let x = data.acceleration.x
            print("X: \(x)")
        }
    }
}

CMSensorDataList enumeration in swift on ios11

1 Answers1