我想创建一个多行文本字段,该文本行可以自动广告换行符,并具有滚动视图,就像Notes应用程序一样,在SwiftUI中有什么直接方法可以做到这一点?
答案 0 :(得分:4)
这适用于Xcode 11.0 beta 6:
import SwiftUI
struct ContentView: View {
@State var text = ""
var body: some View {
VStack {
Text("text is: \(text)")
TextView(
text: $text
)
.frame(minWidth: 0, maxWidth: .infinity, minHeight: 0, maxHeight: .infinity)
}
}
}
struct TextView: UIViewRepresentable {
@Binding var text: String
func makeCoordinator() -> Coordinator {
Coordinator(self)
}
func makeUIView(context: Context) -> UITextView {
let myTextView = UITextView()
myTextView.delegate = context.coordinator
myTextView.font = UIFont(name: "HelveticaNeue", size: 15)
myTextView.isScrollEnabled = true
myTextView.isEditable = true
myTextView.isUserInteractionEnabled = true
myTextView.backgroundColor = UIColor(white: 0.0, alpha: 0.05)
return myTextView
}
func updateUIView(_ uiView: UITextView, context: Context) {
uiView.text = text
}
class Coordinator : NSObject, UITextViewDelegate {
var parent: TextView
init(_ uiTextView: TextView) {
self.parent = uiTextView
}
func textView(_ textView: UITextView, shouldChangeTextIn range: NSRange, replacementText text: String) -> Bool {
return true
}
func textViewDidChange(_ textView: UITextView) {
print("text now: \(String(describing: textView.text!))")
self.parent.text = textView.text
}
}
}
struct ContentView_Previews: PreviewProvider {
static var previews: some View {
ContentView()
}
}
答案 1 :(得分:1)
您要找的实际上是29
。 SwiftUI中没有当前等效项,因此您必须使用myline[29:]
结构来实现此目的。有关如何包装UIKit视图和视图控制器以用于SwiftUI的信息,请参见Apple's SwiftUI + UIKit tutorial;有关可能的实现方式(以及易于忽略的细节的解决方案),请参见this question。
答案 2 :(得分:0)
你可以使用
TextEditor(text: $text)