modifyContentsFile function
Create the Contents.json file
Implementation
void modifyContentsFile(String newIconName) {
final String newIconFolder =
iosAssetFolder + newIconName + '.appiconset/Contents.json';
File(newIconFolder).create(recursive: true).then((File contentsJsonFile) {
final String contentsFileContent =
generateContentsFileAsString(newIconName);
contentsJsonFile.writeAsString(contentsFileContent);
});
}