init(toolTip:in:)
Creates a tooltip configuration, and sets the tooltip text and hover region within the view or control.
Declaration
convenience init(toolTip: String, in sourceRect: CGRect)Parameters
- toolTip:
The text that appears in the tooltip.
- sourceRect:
The region of the view or control where the pointer must hover to trigger the display of the tooltip.
Discussion
Create a configuration using this method to show the tooltip when the pointer hovers over the specified region of the view or control. For example, the following code listing returns a configuration that instructs the view shows the tooltip only when the pointer hovers over either top or bottom regions of a view. The tooltip does’t appear when the pointer hovers over the middle region of the view.
func toolTipInteraction(_ interaction: UIToolTipInteraction, configurationAt point: CGPoint) -> UIToolTipConfiguration? {
var topRect = self.bounds
var bottomRect = self.bounds
let partHeight = self.bounds.size.height / 3
topRect.size.height = partHeight
bottomRect.size.height = partHeight
bottomRect.origin.y = partHeight * 2
// Display tooltip if the pointer within the top or bottom rects.
if topRect.contains(point) {
return UIToolTipConfiguration(toolTip: "Top area of the view.", in: topRect)
} else if bottomRect.contains(point) {
return UIToolTipConfiguration(toolTip: "Bottom area of the view.", in: bottomRect)
}
// Pointer is in the middle of the view. Don't display a tooltip.
return nil
}