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QML 界面切换的方法

news 2025/11/24 22:07:57

在 QML 中，有几种常见的方法可以实现界面的切换。以下是几种常见的方式：

1. 使用 StackView

StackView 是用于管理界面堆叠的控件，它允许你以栈的方式进行界面切换。你可以将多个 Item（界面）推入或弹出堆栈，从而实现切换。

示例：

qml
i

mport QtQuick 2.15
import QtQuick.Controls 2.15ApplicationWindow {visible: truewidth: 640height: 480StackView {id: stackViewanchors.fill: parentinitialItem: Page1 { }Component.onCompleted: {// 在初始界面显示后，可以通过代码推送新的界面stackView.push(Page2)}}Component {id: page1Page1 {// 内容}}Component {id: page2Page2 {// 内容}}
}Page1.qml
---------
import QtQuick 2.15
import QtQuick.Controls 2.15Rectangle {width: 640height: 480Button {text: "Go to Page 2"onClicked: stackView.push(page2)}
}Page2.qml
---------
import QtQuick 2.15
import QtQuick.Controls 2.15Rectangle {width: 640height: 480Button {text: "Back to Page 1"onClicked: stackView.pop()}
}

2. 使用 Loader

Loader 可以动态加载 QML 组件，可以用它来实现界面切换。当你需要加载不同的界面时，Loader 会替换其 source 属性的内容。

示例：

qml

import QtQuick 2.15
import QtQuick.Controls 2.15ApplicationWindow {visible: truewidth: 640height: 480Loader {id: loaderanchors.fill: parentsource: "Page1.qml"}Button {text: "Switch to Page 2"anchors.bottom: parent.bottomanchors.horizontalCenter: parent.horizontalCenteronClicked: loader.source = "Page2.qml"}
}

3. 使用 Repeater 和 StackLayout

如果你有多个页面需要切换，并且它们之间有类似的布局，可以使用 Repeater 配合 StackLayout 来动态生成和管理页面。

示例：

qml

import QtQuick 2.15
import QtQuick.Controls 2.15
import QtQuick.Layouts 1.15ApplicationWindow {visible: truewidth: 640height: 480StackLayout {id: stackanchors.fill: parentRepeater {model: 2 // Number of pagesdelegate: Rectangle {width: stack.widthheight: stack.heightcolor: index % 2 === 0 ? "lightblue" : "lightgreen"Button {text: index % 2 === 0 ? "Page 1" : "Page 2"anchors.centerIn: parentonClicked: stack.currentIndex = (stack.currentIndex + 1) % 2}}}}
}

4. 使用 States 和 Transitions

States 和 Transitions 提供了一种基于状态的界面切换方法，适合用于简单的视图切换场景。

示例：

qml

import QtQuick 2.15
import QtQuick.Controls 2.15ApplicationWindow {visible: truewidth: 640height: 480Rectangle {width: 640height: 480state: "page1"states: [State {name: "page1"when: currentState === "page1"PropertyChanges {target: page1visible: true}PropertyChanges {target: page2visible: false}},State {name: "page2"when: currentState === "page2"PropertyChanges {target: page1visible: false}PropertyChanges {target: page2visible: true}}]transitions: [Transition {from: "page1"to: "page2"reversible: trueParallelAnimation {NumberAnimation { properties: "opacity"; from: 0; to: 1; duration: 500 }}}]Rectangle {id: page1width: 640height: 480color: "lightblue"visible: trueButton {text: "Go to Page 2"onClicked: currentState = "page2"}}Rectangle {id: page2width: 640height: 480color: "lightgreen"visible: falseButton {text: "Back to Page 1"onClicked: currentState = "page1"}}}
}