SwiftUI点击全局收起键盘时segmented Picker冲突与键盘弹跳问题求助

方案一修复（推荐使用） #

你遇到的分段选择器手势冲突问题本质是SwiftUI默认外层手势优先级高于子控件手势，只需调整外层点击手势的响应规则即可，无需额外处理Picker控件：
将原来外层VStack的.onTapGesture替换为带GestureMask参数的gesture修饰符，指定子控件手势优先响应：

struct ContentView: View {
    
    @State private var favoriteColor = 0
    @State private var text1:String = ""
    @State private var text2:String = ""
    
    var body: some View {
        
        VStack {
            
            TextField("Type Things", text: $text1)
            
            TextField("Type More Things", text: $text2)
            
            Picker("What is your favorite color?", selection: $favoriteColor) {
                Text("Red").tag(0)
                Text("Green").tag(1)
            }
            .pickerStyle(.segmented)

        }
        .frame(
              minWidth: 0,
              maxWidth: .infinity,
              minHeight: 0,
              maxHeight: .infinity,
              alignment: .center
        )
        .background(Color.blue.opacity(0.4))
        // 替换原来的onTapGesture为下面的写法
        .gesture(
            TapGesture()
                .onEnded {
                    UIApplication.shared.sendAction(#selector(UIResponder.resignFirstResponder), to: nil, from: nil, for: nil)
                },
            including: .subviews
        )
        
    }
}

including: .subviews参数表示只有当点击位置的子控件没有响应当前手势时，才会触发外层的收起键盘逻辑，完美兼容segmented Picker的点击选中，同时不会影响点击空白处收起键盘的逻辑。

方案二修复 #

如果偏好全局Window手势的实现方式，只需在手势触发逻辑中排除输入类控件的点击事件即可解决键盘弹跳问题：
修改UIGestureRecognizerDelegate的实现，点击目标为输入框时不触发收起逻辑：

extension UIApplication: UIGestureRecognizerDelegate {
    public func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldReceive touch: UITouch) -> Bool {
        // 排除输入类控件的点击事件
        guard let touchView = touch.view,
              !(touchView is UITextField || touchView is UITextView) else {
            return false
        }
        UIApplication.shared.sendAction(#selector(UIResponder.resignFirstResponder), to: nil, from: nil, for: nil)
        return true
    }

    public func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldRecognizeSimultaneouslyWith otherGestureRecognizer: UIGestureRecognizer) -> Bool {
        return true
    }
}

这样点击输入框切换的时候不会触发收起键盘逻辑，自然不会出现键盘弹跳的问题。

内容的提问来源于stack exchange，提问作者user14305195