ios - NavigationView 在纵向模式下消失
问题描述
为什么NavigationView
将我的设备旋转到纵向模式时我的消失。我已经为我的应用启用了所有方向。
import SwiftUI
struct Stocks: Identifiable{
var id = UUID()
var name = String()
}
struct ContentView: View {
let stocks: [Stocks] = [
Stocks(name: "Agricultural Bank of China"),
Stocks(name: "China Communications Construction"),
Stocks(name: "China Communications Construction Company Limited"),
Stocks(name: "China Merchants Shekou Industrial Zone Holdings"),
Stocks(name: "China Railway Construction Corporation Limited"),
Stocks(name: "China State Construction Engineering Corporation "),
Stocks(name: "Daqin Railway Company Limited"),
Stocks(name: "Guotai Junan Securities"),
Stocks(name: "Huaneng Power International"),
Stocks(name: "Industrial and Commercial Bank of China"),
Stocks(name: "Jiangsu Yanghe Brewery"),
Stocks(name: "Kweichow Moutai"),
Stocks(name: "Ping An Bank"),
Stocks(name: "Shanghai International Port Group"),
Stocks(name: "Shanghai Pudong Development Bank"),
Stocks(name: "Wuliangye Yibin Company Limited")]
var body: some View {
NavigationView {
List(stocks) {stock in
VStack(alignment: .leading){
Text(stock.name).font(.title)
}
}
.navigationBarTitle(Text("FTSE China A50 Index"))
}
}
}
struct ContentView_Previews: PreviewProvider {
static var previews: some View {
ContentView()
}
}
解决方案
当您将 iPad 旋转到纵向模式时,它会隐藏左侧窗格,从左侧边缘滑动可以再次显示该窗格。我还没有找到任何方法来防止它自动隐藏。如果您稍微修改一下代码,您可以更清楚地看到发生了什么:
var body: some View {
NavigationView {
List(stocks) {stock in
VStack(alignment: .leading){
NavigationLink(stock.name, destination: Text(stock.name)).font(.title)
}
}
.navigationBarTitle(Text("FTSE China A50 Index"))
}
}
现在,如果您单击一行,您将在右侧的详细信息窗格中看到它,并且您会注意到,如果您旋转到纵向,它会显示出来。
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