Which platform(s) does your issue occur on?

• iOS/Android/Both: iOS
• iOS/Android versions: iOS14
• emulator or device. What type of device? both. any devices running iOS14

Please, provide the following version numbers that your issue occurs with:

• CLI: (run tns --version to fetch it) 6.7.8
• Cross-platform modules: (check the 'version' attribute in the
  node_modules/tns-core-modules/package.json file in your project) 6.5.10
• Runtime(s): (look for the "tns-android" and "tns-ios" properties in the package.json file of your project) iOS@6.5.2
• Plugin(s): (look for the version numbers in the package.json file of your
  project and paste your dependencies and devDependencies here)

"dependencies": {
    "@nativescript/theme": "~2.3.0",
    "nativescript-datetimepicker": "^1.2.2",
    "tns-core-modules": "~6.5.0"
  },
  "devDependencies": {
    "nativescript-dev-webpack": "~1.5.0"
  },

Please, tell us how to recreate the issue in as much detail as possible.

1. download sample. unzip and run npm install
2. download xcode12-beta2 (I think you need to be enrolled in the Apple Developer Program to do this, which sucks)
3. run DEVELOPER_DIR=/Applications/Xcode-beta.app/Contents/Developer tns debug ios in terminal (you may have to open a simulator running iOS14 first)
4. click on the field to try to open it
5. see that field does not open a picker
6. find the following error in the log:

CONSOLE LOG file:///app/vendor.js:53426:24: DatePickerField Error: Error: -[_UIDatePickerIOSCompactView _setTextColor:]: unrecognized selector sent to instance 0x7fb421412f00

Is there any code involved?

I tracked it down to _applyDialogSpinnersColors here. Both selectors throw the error: