YAML w=10=sh 绑定

Question

当上下文变量改变时，isOn 属性是否也在下面的代码中被修改了？

property bool isOn: {
    if(context === undefined)
        return false;
    return true
}

Answer 1

诀窍是，尝试一下：

import QtQuick 2.7
import QtQuick.Controls 2.0

ApplicationWindow {
    id: appWindow
    width: 500
    height: 800
    visible: true

    property bool isOn: {
        if(context === undefined)
            return false;
        return true
    }
    property var context
    Button {
        text: isOn
        onClicked: (context ? context = undefined  : context = 1)
    }
}

提示：是

YAML w=10=sh 绑定

QML property bind

javascript

qml

qtquick2