枚举键的大小写

// Properties.qml
import QtQuick

Item {
    enum Color { red, green, blue }
}

// Main.qml
import QtQuick

Item {
    // This lookup could be interpreted as a property lookup on a Singleton or attached object.
    property int i: Properties.green
}

// Properties.qml
import QtQuick

Item {
    enum Color { Red, Green, Blue }
}

// Main.qml
import QtQuick

Item {
    // No ambiguity for the user or the QML engine, this is an enum lookup.
    property int i: Properties.Green
}