如何在 QML 中捕获信号? [英] How to capture a signal in QML?

问题描述

如何将 s 信号从一个 qml 组件发送到另一个?

How I can send s signal from one qml component to another?

下面是一个例子:

Rectangle {
    id: main
    width: 360; height: 360
    signal clicked()

    Text {
        id: testStr
        anchors.centerIn: parent
        text: "Hello World"
    }
    MouseArea {
        id: mouseArea
        anchors.fill: parent
        onClicked: { Qt.quit(); }
    }

    Component.onCompleted: clicked()
    onClicked:  testStr.text = "Demo"
}

如何在其他组件中捕获信号?

How do I capture the signal in other Component?

推荐答案

你应该使用组件信号的connect()方法(信号本身就是对象).

You should use connect() method of component's signals (signals themselves are objects).

function clickHandler() {
    console.log('main clicked')
}
Component.onCompleted: {
    main.clicked.connect(clickHandler)
}

参见 http://developer.qt.nokia.com/doc/qt-4.8/qmlevents.html

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