# NSDKLogCallback

Source: https://www.nianticspatial.com/docs/api/swift/NSDK.interface-NSDKLogCallback/

NSDKLogCallback

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## Declaration

protocol NSDKLogCallback : AnyObject

## Summary

Protocol for receiving log messages from NSDK.
Implement this protocol to receive NSDK log messages in your application.
The callback will be invoked on background threads, so ensure your implementation
is thread-safe.

## Example Usage

```swift
class MyLogCallback: NSDKLogCallback {
    func onLog(level: NSDKLogLevel, message: String, fileName: String?, fileLine: Int, funcName: String?) {
        let levelStr = level.description
        let location = fileName.map { "\($0):\(fileLine)" } ?? ""
        let funcInfo = funcName.map { " \($0)" } ?? ""
        print("[NSDK-\(levelStr)] \(location)\(funcInfo): \(message)")
    }
}
let callback = MyLogCallback()
let session = NSDKSession(accessToken: "your-token", logCallback: callback)
```

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## Methods

| Name | Type | Summary |
| --- | --- | --- |
| onLog | void | Called when NSDK generates a log message. |

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