Hello everyone,
I'm currently working on a SwiftUI wrapper for UIView and UIViewController, and my aim is to make this wrapper respect the size of the UIView and constraints.
For now, I have successfully implemented the sizeThatFits method from the UIViewRepresentable protocol, and it's working as expected. Here's my current implementation:
func sizeThatFits(_ width: CGFloat?, _ height: CGFloat?) -> CGSize? {
let intrinsicContentSize = self.intrinsicContentSize
let targetSize = CGSize(
width: width ?? intrinsicContentSize.width,
height: height ?? intrinsicContentSize.height
)
guard targetSize.width != UIView.noIntrinsicMetric, targetSize.height != UIView.noIntrinsicMetric else {
return nil
}
let horizontalPriority: UILayoutPriority = width == nil ? .defaultLow : .defaultHigh
let verticalPriority: UILayoutPriority = height == nil ? .defaultLow : .defaultHigh
return systemLayoutSizeFitting(
targetSize,
withHorizontalFittingPriority: horizontalPriority,
verticalFittingPriority: verticalPriority
)
}
However, this method is only available from iOS 16 onwards. My goal is to provide the same functionality across all iOS versions.
I have experimented with various constraints and content compression/hugging priorities, but I have yet to achieve satisfying results.
Any suggestions or ideas on how to accomplish this would be greatly appreciated. Thank you!