首先通過(guò)擴(kuò)展 UIApplication

extension UIApplication{
    func endEditing(){
        UIApplication.shared.sendAction(#selector(UIResponder.resignFirstResponder), to: nil, from: nil, for: nil)
    }
}

然后在需要的地方添加 UIApplication.shared.endEditing()

var body: some View {
        VStack {
            TextField("城市名稱", text: $cityName, onEditingChanged: { (value) in
                print("onEditingChanged:\(self.cityName)")
            }) {
                //當(dāng)用戶點(diǎn)擊返回按鈕時(shí)調(diào)用
                print("onEditing:\(self.cityName)")
            }
            .padding([.top, .leading, .trailing], 20.0)
            .textFieldStyle(RoundedBorderTextFieldStyle())
            Text("城市名稱：\(cityName)")
            Spacer()
        }
        .background(Color.white) //測(cè)試時(shí)發(fā)現(xiàn)必須設(shè)置，不然點(diǎn)擊空白處無(wú)效 (有點(diǎn)懵逼)
        .onTapGesture {
            print("測(cè)試點(diǎn)擊")
            UIApplication.shared.endEditing()
        }
    }