qml: 组件复用
在编写组件时,使用下面两种方法可以实现组件的复用:
import QtQuick 2.0 import QtQuick.Window 2.2 import QtQuick.Controls 1.4 as Controls import Global 1.0 import "qrc:/materialUI/core" Controls.ApplicationWindow { id: dg; width: Math.max(content.width+ 32,minimumWidth); height: content.height + 32 + buttonContraner.height + 16; visible: false; default property alias content: content.data; //默认属性; property alias buttons: buttonView.children; //引用; signal rejected(); property string nextButtonText: "下一步" property string negetiveButtonText: "取消" minimumWidth: 300; View{ anchors.fill: parent; backgroundColor: "#ffffff" Item{ id : contrainer; width: content.implicitWidth; height: content.height; anchors{ left: parent.left; right: parent.right; top: parent.top; leftMargin: 16; topMargin: 16; rightMargin: 16; } Item{ id: flickItem; clip: true; anchors.fill: parent; Column{ id: content; spacing: Global.margin; } } } Item{ id: buttonContraner; anchors{ left: parent.left; right: parent.right; bottom: parent.bottom; bottomMargin: 8; } height: negetiveButton.implicitHeight + 8; clip: true; View{ id: buttonView; // backgroundColor: dg.color; elevation: 0; fullWidth: true; elevationInverted: true; anchors{ bottom: parent.bottom; right: parent.right; left: parent.left; } } } } function open() { dg.visible = true; } function close() { dg.visible = false; } Component.onCompleted: { console.log(content.height + " " + buttonContraner.height ) } }
1. 默认属性;
每一个qml组件仅有一个default property属性。
如上述代码; 通过申明默认属性,在使用该组件时,qml会自动将子成员对象插入到指定的位置;
2.引用;
在上述代码中;
property alias buttons: buttonView.children;
该表示即为引用,通过对buttons进行赋值,也能实现指定域扩展;