The search result show gray blank view on Google maps

[wangdu1005]

Thanks for your demo app, I have issue about this search result. Do I need to do any config setting about sqlite or coredata?

<NSPersistentStoreDescription: 0x604000245f40> (type: SQLite, url: file:///Users/xxx/Library/Developer/CoreSimulator/Devices/57778D08-3E26-4DA0-A247-A8F56AB4B70E/data/Containers/Data/Application/6EB59DC8-9A9B-481C-9349-533F42A54402/Library/Application%20Support/TravelTracker.sqlite) CoreData: annotation: Failed to load optimized model at path '/Users/xxx/Library/Developer/CoreSimulator/Devices/57778D08-3E26-4DA0-A247-A8F56AB4B70E/data/Containers/Bundle/Application/55F1E2C8-4F3E-4326-9BC0-E8AC26E3F568/TravelTracker.app/GoogleMaps.bundle/GMSCacheStorage.momd/StorageWithTileVersionID.omo' CoreData: annotation: Failed to load optimized model at path '/Users/xxx/Library/Developer/CoreSimulator/Devices/57778D08-3E26-4DA0-A247-A8F56AB4B70E/data/Containers/Bundle/Application/55F1E2C8-4F3E-4326-9BC0-E8AC26E3F568/TravelTracker.app/GoogleMaps.bundle/GMSCacheStorage.momd/StorageWithTileVersionID.omo' CoreData: annotation: Failed to load optimized model at path '/Users/xxx/Library/Developer/CoreSimulator/Devices/57778D08-3E26-4DA0-A247-A8F56AB4B70E/data/Containers/Bundle/Application/55F1E2C8-4F3E-4326-9BC0-E8AC26E3F568/TravelTracker.app/GoogleMaps.bundle/GMSCacheStorage.momd/StorageWithTileVersionID.omo' 2018-09-11 18:30:15.619889+0800 TravelTracker[40316:1591985] Google Maps SDK for iOS and Google Places API for iOS version: 2.5.30219.0 2018-09-11 18:30:15.620323+0800 TravelTracker[40316:1591985] New version of Google Maps SDK for iOS and Google Places API for iOS available: 2.7.30514.0 2018-09-11 18:30:15.667628+0800 TravelTracker[40316:1593765] TIC Read Status [1:0x0]: 1:57 2018-09-11 18:30:15.667857+0800 TravelTracker[40316:1593765] TIC Read Status [1:0x0]: 1:57