我正在尝试为了学习目的,创建自己的SwiftUI版本的UISearchBar
。
我已经按照这篇教程中的步骤操作,并且此时我的搜索栏结构如下所示:
import Foundation
import SwiftUI
struct SearchBarUI: View {
@Binding var searchText:String
var textColor:Color
var boxColor:Color
var boxHeight:CGFloat
public init(_ text:Binding<String>, textColor:Color, boxColor:Color, boxHeight:CGFloat) {
self._searchText = text
self.textColor = textColor
self.boxColor = boxColor
self.boxHeight = boxHeight
}
var body: some View {
HStack {
Image(systemName: "magnifyingglass")
.padding(.leading, -10)
.foregroundColor(.secondary)
TextField("Search", text: $searchText, onCommit: {
UIApplication.shared.windows.first { $0.isKeyWindow }?.endEditing(true)
})
.padding(.leading, 10)
Button(action: {
self.searchText = ""
}) {
Image(systemName: "xmark.circle.fill")
.foregroundColor(.secondary)
.opacity(searchText == "" ? 0 : 1)
.animation(.linear)
}
}.padding(.horizontal)
}
}
但是问题在这里。
当我在ContentView中使用这个搜索栏时,我希望搜索文本变量像这样:
class GlobalVariables: ObservableObject {
@Published var searchText:String = ""
}
@EnvironmentObject var globalVariables : GlobalVariables
SearchBarUI(globalVariables.searchText,
textColor:.black,
boxColor:.gray,
boxHeight:50)
因为搜索文本的值必须传播到其他会对其更改做出反应的接口元素。但是,然后我在
SearchBarUI
行上遇到了错误,指向globalVariables.searchText
。Cannot convert value of type 'String' to expected argument type 'Binding<String>'
我该如何解决这个问题?
globalVariables
和其中的throttleModel
是什么? - Asperi