QT/QML如何在地图上运行mapReady?
我被困在mapReady进入QML的过程中 根据文档,建议使用此属性发出的信号代替Component.onCompleted 从这个简单的main.qml代码QT/QML如何在地图上运行mapReady?,qt,qml,qtlocation,Qt,Qml,Qtlocation,我被困在mapReady进入QML的过程中 根据文档,建议使用此属性发出的信号代替Component.onCompleted 从这个简单的main.qml代码 import QtQuick 2.0 import QtQuick.Window 2.0 import QtLocation 5.6 import QtPositioning 5.6 Window { width: 512 height: 512 visible: true Item{
import QtQuick 2.0
import QtQuick.Window 2.0
import QtLocation 5.6
import QtPositioning 5.6
Window {
width: 512
height: 512
visible: true
Item{
anchors.fill: parent
objectName: "bboxObj"
Map {
anchors.fill: parent
id: map
plugin: Plugin{name: "osm"}
zoomLevel: (maximumZoomLevel - minimumZoomLevel)/2
center: QtPositioning.coordinate(59.91, 10.75) // Oslo
}
Component.onCompleted:{
console.log("mapReady : " + map.mapReady)
console.log("visibleRegion : " + map.visibleRegion.boundingGeoRectangle())
}
}
}
结果是:
地图准备好后,如何使用onMapReady调用visibleRegion
我尝试过这一点,但没有成功:
Map.onMapReadyChanged: {
console.log("mapReady : " + map.mapReady)
console.log("visibleRegion : " + map.visibleRegion.boundingGeoRectangle())
console.log("visibleRegion.isValid : " + map.visibleRegion.isValid)
console.log("visibleRegion.isEmpty : " + map.visibleRegion.isEmpty)
}
您不使用Map.onMapReadyChanged,但只在Map元素内部使用onMapReadyChanged谢谢Paul,现在好多了!
Map.onMapReadyChanged: {
console.log("mapReady : " + map.mapReady)
console.log("visibleRegion : " + map.visibleRegion.boundingGeoRectangle())
console.log("visibleRegion.isValid : " + map.visibleRegion.isValid)
console.log("visibleRegion.isEmpty : " + map.visibleRegion.isEmpty)
}