QML-无法分配给不存在的属性“样式" [英] QML - Cannot assign to non-existent property "style"

问题描述

我将Qt 5.10.1与Qt Creator 4.5.1结合使用，并且 style 属性在元素中永远不可用.

I'm using Qt 5.10.1 with Qt Creator 4.5.1 and the style property is never available in elements.

例如，如下所示 ButtonStyle QML类型，我想这样做:

For example, as shown here ButtonStyle QML Type , I would like to do:

Button {
    text: "A button"
    style: ButtonStyle {...}
}

但是，我得到了错误:

无法分配给不存在的属性样式"

Cannot assign to non-existent property "style"

我尝试使用矩形，进度条，但遇到相同的错误.

I tried with a rectangle, progressbar and I get the same error.

编辑#1:

我确实有所有这些进口.如果导入丢失，我会在 ButtonStyle 上看到错误，但错误是在 style 上.

I do have all these imports. If the import was missing, I would get the error on ButtonStyle , but the error is on style.

import QtQuick 2.2
import QtQuick.Controls 2.3
import QtQuick.Dialogs 1.0
import QtGraphicalEffects 1.0
import QtQuick.Shapes 1.0
import QtQuick.Layouts 1.3
import QtQuick.Controls.Styles 1.4

推荐答案

在QML中，按钮有两种类型:

There are 2 types of Buttons in QML:

• 按钮Qt快速控件2: https://doc .qt.io/qt-5.10/qml-qtquick-controls2-button.html
• 按钮Qt快速控件: http://doc. qt.io/qt-5/qml-qtquick-controls-button.html

• Button Qt Quick Controls 2: https://doc.qt.io/qt-5.10/qml-qtquick-controls2-button.html
• Button Qt Quick Controls: http://doc.qt.io/qt-5/qml-qtquick-controls-button.html

在您的情况下，您要导入Qt QuickControls 2按钮:import QtQuick.Controls 2.3，并且该按钮不具有style属性.

In your case, you are importing the Qt QuickControls 2 Button: import QtQuick.Controls 2.3, and that Button does not have the style attribute.

如果需要使用样式，则必须导入:

If you need to use the style you must import:

import QtQuick.Controls 1.4

代替:

import QtQuick.Controls 2.3

---

如果您使用的是Qt Quick Controls和Qt Quick Controls 2中的项目，则可以使用名称空间将它们分开:

---

If you are using items from Qt Quick Controls and Qt Quick Controls 2 you could separate them using a namespace:

import QtQuick.Controls 2.3 as QQC2
import QtQuick.Controls 1.4 as QQC1

QQC1.Button {
    text: "A button"
    style: ButtonStyle {...}
}

QQC2.another_item_of_Qt_Quick_Controls2{
}

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