When adding NSTextView in xib, we see it is embedded under NSClipView. But if we try to use NSClipView to replicate what's in the xib, it does not scroll.
To make it work, we can follow Putting an NSTextView Object in an NSScrollView and How to make scrollable vertical NSStackView to make our ScrollableInput
For easy Auto Layout, we use Anchors for UIScrollView.
Things worth mentioned for vertical scrolling
textContainer.heightTracksTextView = false
textView.autoresizingMask = [.width]
textView.isVerticallyResizable = true
class ScrollableInput: NSView {
let scrollView = NSScrollView()
let textView = NSTextView()
override init(frame frameRect: NSRect) {
super.init(frame: frameRect)
let rect = CGRect(
x: 0, y: 0,
width: 0, height: CGFloat.greatestFiniteMagnitude
)
let layoutManager = NSLayoutManager()
let textContainer = NSTextContainer(size: rect.size)
layoutManager.addTextContainer(textContainer)
textView = NSTextView(frame: rect, textContainer: textContainer)
textView.maxSize = NSSize(width: 0, height: CGFloat.greatestFiniteMagnitude)
textContainer.heightTracksTextView = false
textContainer.widthTracksTextView = true
textView.isRichText = false
textView.importsGraphics = false
textView.isEditable = true
textView.isSelectable = true
textView.font = R.font.text
textView.textColor = R.color.text
textView.isVerticallyResizable = true
textView.isHorizontallyResizable = false
addSubview(scrollView)
scrollView.hasVerticalScroller = true
scrollView.drawsBackground = false
scrollView.drawsBackground = false
textView.drawsBackground = false
activate(
scrollView.anchor.edges
)
scrollView.documentView = textView
textView.autoresizingMask = [.width]
}
required init?(coder decoder: NSCoder) {
fatalError()
}
}
Original post https://github.com/onmyway133/blog/issues/330
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