TextView展开父视图，导致文本被隐藏

如何解决TextView展开父视图，导致文本被隐藏

我的问题显示在下面的照片中：

我尝试在父视图和文本字段上使用.fixedSize（horizo​​ntal：vertical），但没有任何积极结果。

TheTextField：

struct TheTextField: UIViewRepresentable {
    @Binding var text : String
    @Binding var placeholder : String
    
    func makeCoordinator() -> TheTextField.Coordinator {
        return TheTextField.Coordinator(parent1: self)
    }
    
    func makeUIView(context: UIViewRepresentableContext<TheTextField>) -> UITextView {
        let tview = UITextView()
        tview.isEditable = true
        tview.isUserInteractionEnabled = true
        tview.isScrollEnabled = false
        tview.text = placeholder
        tview.textColor = .gray
        tview.font = .systemFont(ofSize: 20)
        tview.delegate = context.coordinator
        return tview
    }
    
    func updateUIView(_ uiView: UITextView,context: UIViewRepresentableContext<TheTextField>) {
        
    }
    
    class Coordinator : NSObject,UITextViewDelegate {
        var parent : TheTextField
        
        init(parent1 : TheTextField) {
            parent = parent1
        }
        
        func textViewDidChange(_ textView: UITextView) {
            self.parent.text = textView.text
        }
        
        func textViewDidBeginEditing(_ textView: UITextView) {
            textView.text = ""
            textView.textColor = .label
        }
    }
}

我希望textview不展开并将光标移动到下一行，而不是弄乱父级的视图。

示例：

Divider()
TheTextField(text: self.$imagetoUpload.textCaption,placeholder: self.$placeholder).padding(.horizontal)
Spacer()

解决方法

您可以轻松地从我们项目的.storyboard文件中编辑标签属性。 将行更改为0，并将换行符属性更改为所需的类型，然后可以根据需要设置任意多行。Check this image to see what I'm saying

,

import SwiftUI

struct UITextViewWrapper: UIViewRepresentable {
    @Binding var text : String
    @Binding var calculatedHeight: CGFloat
    
    func makeCoordinator() -> UITextViewWrapper.Coordinator {
        return UITextViewWrapper.Coordinator(text: $text,height: $calculatedHeight)
    }
    
    func makeUIView(context: UIViewRepresentableContext<UITextViewWrapper>) -> UITextView {
        let tview = UITextView()
        tview.isEditable = true
        tview.isUserInteractionEnabled = true
        tview.isScrollEnabled = false
        tview.textColor = .gray
        tview.font = .systemFont(ofSize: 20)
        tview.delegate = context.coordinator
        tview.setContentCompressionResistancePriority(.defaultLow,for: .horizontal)
        return tview
    }
    
    func updateUIView(_ uiView: UITextView,context: UIViewRepresentableContext<UITextViewWrapper>) {
        if uiView.text != self.text {
            uiView.text = self.text
        }
        if uiView.window != nil,uiView.isFirstResponder {
            uiView.becomeFirstResponder()
        }
    }
    
    static func recalculateHeight(view: UIView,result: Binding<CGFloat>){
        let newSize = view.sizeThatFits(CGSize(width: view.frame.size.width,height: CGFloat.greatestFiniteMagnitude))
        if result.wrappedValue != newSize.height {
            DispatchQueue.main.async {
                result.wrappedValue = newSize.height // !! must be called asynchronously
            }
        }
    }
    
    class Coordinator : NSObject,UITextViewDelegate {
        var text : Binding<String>
        var calculatedHeight : Binding<CGFloat>
        
        init(text: Binding<String>,height: Binding<CGFloat>) {
            self.text = text
            self.calculatedHeight = height
        }
        
        func textViewDidChange(_ textView: UITextView) {
            text.wrappedValue = textView.text
            UITextViewWrapper.recalculateHeight(view: textView,result: calculatedHeight)
        }
        
        func textViewDidBeginEditing(_ textView: UITextView) {
            textView.text = ""
            textView.textColor = .label
        }
    }
}

我添加了功能，可以根据Asperi的建议根据文本的长度动态更改高度。