SwiftUI struct pass param without label name All In One

SwiftUI struct pass param without label name All In One

💩

// 评分
StarRatingView(snackBar: snackBar);
// infos
SnackInfoView(snackBar: snackBar);

//
//  StarRatingView.swift
//
//  Created by xgqfrms on 2022/5/15.
//

import SwiftUI

struct StarRatingView: View {
  var snackBar: SnackBarModel;
  var body: some View {
    HStack(alignment: .center, spacing: 5) {
      // \.slef 唯一索引 & _ 匿名参数
      ForEach(1...(snackBar.rating), id: \.self) { _ in
        Image(systemName: "star.fill")
          .font(.body)
          .foregroundColor(.yellow)
      }
    }
  }
}

🚀

// 评分
StarRatingView(snackBar);
// infos
SnackInfoView(snackBar);

//
//  StarRatingView.swift
//
//  Created by xgqfrms on 2022/5/15.
//

import SwiftUI

struct StarRatingView: View {
  var snackBar: SnackBarModel;
  // ✅ custom init, 可以省略写 labelName
  init(_ snack: SnackBarModel) {
    self.snackBar = snack;
  }
  var body: some View {
    HStack(alignment: .center, spacing: 5) {
      // \.slef 唯一索引 & _ 匿名参数
      ForEach(1...(snackBar.rating), id: \.self) { _ in
        Image(systemName: "star.fill")
          .font(.body)
          .foregroundColor(.yellow)
      }
    }
  }
}

func

// 1. labelName  === paramName
// paramName: paramType

// 2. labelName 用于 func 外部传参使用， paramName 用于 func 内部使用
// labelName paramName: paramType

// 3. _ anonymous labelName, 外部使用参数无需写 labelName ✅
// _ paramName: paramType

API

https://docs.swift.org/swift-book/LanguageGuide/Initialization.html#ID213

refs

4 different solutions for passing data between views

https://www.createwithswift.com/tutorial-swiftui-passing-data-between-views-using-swiftui/

https://stackoverflow.com/questions/68900579/how-to-omit-argument-name-in-a-struct

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