Error "Use of 'mgl_interpolate:withCurveType:parameters:stops:' as an NSExpression is forbidden" on iOS 15

[adetante]

Steps to Trigger Behavior

1. Use the provided sample code
2. Call to navigationView.showRoutes causes the error

Actual Behavior

• Error:

NSPredicate: Use of 'mgl_interpolate:withCurveType:parameters:stops:' as an NSExpression function is forbidden

• Map is not displayed

Version(s) affected

• Platform: iOS
• OS version: iOS 16
• Device type: iPhone 14 Pro
• Emulator/ Simulator: yes/yes
• Development OS: OSX 13.5.2
• maplibre-navigation-ios Version 2.0.0
• MapLibre GL version 5.13.0

Additional context

• This is fixed into maplibre-native library: Fix for "NSExpression function is forbidden" maplibre-native#411
• Here is the related issue on maplibre-native: Remove patched NSExpressions maplibre-native#331
• Here is the documentation of the required migration: https://maplibre.org/maplibre-native/ios/api/migrating-to-expressions.html#interpolation-mode:

if #available(iOS 15, *) {
    circleExpression = NSExpression(
        forMGLInterpolating: NSExpression(forConstantValue: mag),
        curveType: .linear,
        parameters: nil,
        stops: NSExpression(forConstantValue: stops))
} else {
    // This works up to iOS 14.5
    circleExpression = NSExpression(
        format: "mgl_interpolate:withCurveType:parameters:stops:(mag, 'linear', nil, %@)",
        stops)
}

[Djibs]

I confirm

[Patrick-Kladek]

I think we can close this as it was resolved in #33

[boldtrn]

Ok, please reopen if this occurs again 👍