更新时间:2023-01-23 18:51:53
这很有用,这是我使用SwiftUI获取NSTextView的第一个解决方案:
it can be useful, this is my first solution to get an NSTextView with SwiftUI:
import SwiftUI
import os
let uiLog = OSLog(subsystem: "com.visual-science.CryptiK", category: "UI")
class EditorCoordinator : NSObject, NSTextViewDelegate {
let textView: NSTextView;
let scrollView : NSScrollView
let text : Binding<NSAttributedString>
init(binding: Binding<NSAttributedString>) {
text = binding
textView = NSTextView(frame: .zero)
textView.autoresizingMask = [.height, .width]
textView.textStorage?.setAttributedString(text.wrappedValue)
textView.textColor = NSColor.textColor
scrollView = NSScrollView(frame: .zero)
scrollView.hasVerticalScroller = true
scrollView.autohidesScrollers = false
scrollView.autoresizingMask = [.height, .width]
scrollView.documentView = textView
super.init()
textView.delegate = self
}
func textDidChange(_ notification: Notification) {
switch notification.name {
case NSText.didChangeNotification :
text.wrappedValue = (notification.object as? NSTextView)?.textStorage ?? NSAttributedString(string: "")
default:
os_log(.error, log: uiLog, "Coordinator received unwanted notification")
}
}
}
struct DataTextEditorView: View, NSViewRepresentable {
typealias Coordinator = EditorCoordinator
typealias NSViewType = NSScrollView
let text : Binding<NSAttributedString>
func makeNSView(context: NSViewRepresentableContext<DataTextEditorView>) -> DataTextEditorView.NSViewType {
os_log(.info, log: uiLog, "%@", context.coordinator.scrollView)
return context.coordinator.scrollView
}
func updateNSView(_ nsView: NSScrollView, context: NSViewRepresentableContext<DataTextEditorView>) {
os_log(.debug, log: uiLog, "%@", context.coordinator.self)
os_log(.debug, log: uiLog, "%@", text.wrappedValue)
}
func makeCoordinator() -> EditorCoordinator {
os_log(.info, log: uiLog, "makeCoordinator")
let coordinator = EditorCoordinator(binding: text)
return coordinator
}
}
如果像我一样,您只需要编辑一些没有属性的文本,则可以仅用String替换NSAttributedString,并针对这种较简单的情况修改代码.
If like me, you just need to edit some text without attributes, you can replace NSAttributedString with just String and adapt the code for this simpler case.