memory increase when use PageStack

[jindoniit]

when i use PageStack between pages then memory increase. From Main.qml, i call page MainPage.qml . after that i call page PageDetail.qml . Memory increase but i go back page MainPage.qml then memory does not decrease

this is my code

main.qml

import com.nokia.symbian 1.0
 
Window {
    id: window
 
    StatusBar {
        id: statusBar
        anchors.top: window.top
    }
 
    PageStack {
        id: pageStack
        anchors { left: parent.left; right: parent.right; top: statusBar.bottom; bottom: toolBar.top }
    }
 
    ToolBar {
        id: toolBar
        anchors.bottom: window.bottom
        tools: ToolBarLayout {
            id: toolBarLayout
            ToolButton {
                flat: true
                iconSource: "toolbar-back"
                onClicked: pageStack.depth <= 1 ? Qt.quit() : pageStack.pop()
            }
        }
    }
 
    Component.onCompleted: {
        pageStack.push(Qt.resolvedUrl("MainPage.qml"))
 
    }
}

import com.nokia.symbian 1.0

Window {
    id: window

    StatusBar {
        id: statusBar
        anchors.top: window.top
    }

    PageStack {
        id: pageStack
        anchors { left: parent.left; right: parent.right; top: statusBar.bottom; bottom: toolBar.top }
    }

    ToolBar {
        id: toolBar
        anchors.bottom: window.bottom
        tools: ToolBarLayout {
            id: toolBarLayout
            ToolButton {
                flat: true
                iconSource: "toolbar-back"
                onClicked: pageStack.depth <= 1 ? Qt.quit() : pageStack.pop()
            }
        }
    }

    Component.onCompleted: {
        pageStack.push(Qt.resolvedUrl("MainPage.qml"))

    }
}

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MainPage.qml

import QtQuick 1.0
import com.nokia.symbian 1.0
 
Page {
    id: mainPage
    Text {
        id: text1
        anchors.centerIn: parent
        text: qsTr("Hello world!")
        color: platformStyle.colorNormalLight
        font.pixelSize: 20
    }
 
    Button{
        width: 150
        text :"page 2"
        anchors.horizontalCenter: parent.horizontalCenter
        anchors.top: text1.bottom
        anchors.topMargin: 10
        onClicked: {
 
            pageStack.push(Qt.resolvedUrl("PageDetail.qml"))
        }
    }
}

import QtQuick 1.0
import com.nokia.symbian 1.0

Page {
    id: mainPage
    Text {
        id: text1
        anchors.centerIn: parent
        text: qsTr("Hello world!")
        color: platformStyle.colorNormalLight
        font.pixelSize: 20
    }

    Button{
        width: 150
        text :"page 2"
        anchors.horizontalCenter: parent.horizontalCenter
        anchors.top: text1.bottom
        anchors.topMargin: 10
        onClicked: {

            pageStack.push(Qt.resolvedUrl("PageDetail.qml"))
        }
    }
}

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PageDetail.qml

i

mport QtQuick 1.0
import com.nokia.symbian 1.0
 
Page {
    Button {
        id: button1
        x: 142
        y: 437
        text: "Tro ve"
        onClicked: pageStack.pop()
    }
}

mport QtQuick 1.0
import com.nokia.symbian 1.0

Page {
    Button {
        id: button1
        x: 142
        y: 437
        text: "Tro ve"
        onClicked: pageStack.pop()
    }
}

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how to decrease memory when go back page ManiPage.qml ?
thanks.

[wysota]

It's not a memory leak, it's quite normal since going back to the original page doesn't cause the previous one to be destroyed, you can still access its components.

[jindoniit]

so , how to way to destroy PageDetail.qml when go back page MainPage.qml?

my project has many page .and when i move between pages then memory increase. it can lead to out of memory

[gentooxativa]

You have many ways to delete pages, for example with PageStack.clear() but you go to delete all your pages, including the current one.

For example i use that to clean the memory:

pageStack.clear()
                pageStack.push( Qt.resolvedUrl("SecondPage.qml"))

pageStack.clear()
                pageStack.push( Qt.resolvedUrl("SecondPage.qml"))

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Or you can replace the current page, with

pageStack.replace()

pageStack.replace()

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but you dont go to have the back function.

Hope that helps

[jindoniit]

I tried to follow way of you. and as you said :it delete all my pages . so what do you have way to reduce memory when use pagestack.pop() ?