问题
I am trying to apply some styles to a new qt 5.7 application I am working on and the following is not working at all. It gives the error: qrc:/SignInView.qml:67 Cannot assign to non-existent property "style" And I can't edit it in design mode for the same reasons.
import QtQuick 2.7
import QtQuick.Controls 2.0
import QtQuick.Layouts 1.1
import QtQuick.Controls.Styles 1.4
Page {
id: page1
ColumnLayout {
id: columnLayout1
height: 100
anchors.right: parent.right
anchors.left: parent.left
anchors.top: parent.top
Label {
text: qsTr("Label")
font.pointSize: 16
horizontalAlignment: Text.AlignHCenter
Layout.fillWidth: true
}
Image {
id: image1
width: 200
height: 200
Layout.alignment: Qt.AlignHCenter | Qt.AlignTop
fillMode: Image.PreserveAspectCrop
anchors.horizontalCenter: parent
source: "qrc:/qtquickplugin/images/template_image.png"
Button {
id: button1
text: qsTr("Button")
anchors.bottomMargin: 10
anchors.rightMargin: 10
anchors.bottom: parent.bottom
anchors.right: parent.right
}
}
Rectangle {
id: field1
width: 200
height: 40
color: "#ffffff"
Layout.fillWidth: true
Label {
id: label1
text: qsTr("Full Name")
anchors.topMargin: 0
anchors.left: parent.left
anchors.leftMargin: 5
anchors.top: parent.top
}
TextField {
style: TextFieldStyle {
textColor: "black"
background: Rectangle {
radius: 2
implicitWidth: 100
implicitHeight: 24
border.color: "#333"
border.width: 1
}
}
}
}
}
}
I have being trying to follow this example:
http://doc.qt.io/qt-5/qml-qtquick-controls-styles-textfieldstyle.html
It fails at the style attribute in the Qt Creator giving the error that style doesn't exist. I assume it's something with my libraries not loading or maybe the environment I have setup. I don't have style in buttons or anywhere else either. I assumed if I had the imports it would work but it's not.
A related issue on SO is here: QML - How to change TextField font size But here it seems to just work.
回答1:
In Qt Quick Controls 2, there is no such property as TextField::style
. In general, there is no way to use the style objects from Qt Quick Controls 1 with Qt Quick Controls 2. The APIs between the two major versions of Qt Quick Controls are not compatible. See the following documentation pages for more details:
- Differences between Qt Quick Controls
- Styling Qt Quick Controls 2
- Customizing Qt Quick Controls 2
A new API-incompatible major version was introduced, because there is basically no way to make the heavily Loader-based architecture of Qt Quick Controls 1 perform reasonably well. Therefore all that dynamic loading of Component
s was ditched in Qt Quick Controls 2. The delegates that used to be dynamically instantiated from Component
s provided by a dynamically loaded style object are now part of the control instead, instantiated "in place". In essence:
TextField {
style: TextFieldStyle {
textColor: "white"
background: Rectangle { color: "black" }
}
}
vs.
TextField {
color: "white"
background: Rectangle { color: "black" }
}
You can read more about the history here. In particular, this post highlights the fundamental structural changes in Qt Quick Controls 2.
来源:https://stackoverflow.com/questions/39052139/how-do-i-apply-the-style-to-a-textfield-in-qml-it-seems-style-attribute-isnt