qt - How to Use QML StackView? -

i beginner in qml , have worked more on stackwidget in qt c++.in qml confused use stackview , have written following code:

window {     visible: true     width: 640     height: 480     title: qstr("stack view")      mainform {         stackview {             id: stackview             x: 0             y: 0             width: 360             height: 360              initialitem: page1              rectangle {                 id: page1                  //anchors.fill: parent                 color: "lightgreen"                 button {                     id: buttonpage1                     text: "back 2"                     anchors.centerin: parent                     onclicked: {                         stackview.pop()  //**is correct**                         stackview.push(page2) //**is correct**                      }                 }                 textedit {                     id: te1                     width: 105                     height: 40                     text: "enter"                 }             }             rectangle {                 id: page2                  //anchors.fill: parent                 color: "lightblue"                 button {                     id: buttonpage2                     text: "back 1"                     anchors.centerin: parent                     onclicked: {                         stackview.pop() //**is correct**                     }                 }                 textedit {                     id: te2                     width: 109                     height: 29                     text: "enter"                 }             }         }     } } 

below questions:

1. in stackwidget using setcurrentindex set desired page , know in qml should use push , pop. in case how use push , pop navigate between page1 , page2 based on selection. ?

2. initially, can load pages stackview?

3. how save content in page when pop item stackview?

i know not answer question on how use stackview, because think don't want have stackview following description.

the use-case of stackview is, when have pages - names suggests - on stack. if want switch between pages, not determinable, 1 logically below another, stackview not want, , might want consider swipeview.

in swipeview pages coexist in side-by-side manner. since qt 5.9 have interactive property might disable swipe behaviour. here can choose page want show setting currentindex.

however, swipeview create pages needed, reduce memory , cpu load (effectively disabling bindings of unloaded pages). might result in data loss, if data not stored in model outside page itself.

if want have pages loaded @ same time, , want switch visible one, might go simple custom component:

item {     property int currentindex     page1 { visible: parent.currentindex === 0 }     page2 { visible: parent.currentindex === 1 }     page3 { visible: parent.currentindex === 2 }     ... } 

or go like:

myview.qml

item {     id: root     property int currentindex: 0     default property item newcontent      onnewcontentchanged: {         newcontent.parent = root         newcontent.visible = qt.binding(bindingsclosure(root.children.length - 1))     }      function bindingsclosure(index) { return function() { return root.currentindex === index } } } 

main.qml

myview {     page1 { }     page2 { }     page3 { } }