qml anchors
时间: 2023-10-08 20:14:08 浏览: 54
QML anchors are used to specify the position of a QML item relative to its parent item or to other items in the same container. Anchors allow for dynamic positioning of items in response to changes in the layout or screen size.
Anchors can be set using the following properties:
- anchor.left: sets the left edge of the item
- anchor.right: sets the right edge of the item
- anchor.top: sets the top edge of the item
- anchor.bottom: sets the bottom edge of the item
- anchor.horizontalCenter: sets the horizontal center of the item
- anchor.verticalCenter: sets the vertical center of the item
- anchor.fill: sets the item to fill its parent item
- anchor.margins: adds a margin around the item
Anchors can also be used in combination with each other to create more complex positioning. For example, the anchor.left and anchor.right properties can be used together to specify a width for the item, while the anchor.top and anchor.bottom properties can be used together to specify a height.
Anchors can be set in QML using the anchor property of an item, followed by one or more of the anchor properties listed above. For example:
Rectangle {
width: 100
height: 100
color: "red"
Text {
text: "Hello, World!"
anchors.centerIn: parent
}
}
In this example, the Text item is centered horizontally and vertically within the Rectangle item using the anchors.centerIn property.