Question

我有一个包含结构的文件（每个strucht都包含一个数组）。

我希望能够使用用户在另一个视图中选择的Struct！对不起，如果我无法解释自己。

代码如下：

这是包含“锻炼”的内容

import Foundation

struct Routines {
let routineName: String
let videoFileName: String
let description: Array<Any>
let thumbnailFileName: String

static func fetchRoutines() -> [Routines] {
    let v1 = Routines(routineName: "Recommended Routine", videoFileName: "v1", description: Workout1.fetchWorkout1(), thumbnailFileName: "v8")
    let v2 = Routines(routineName: "Routine Extra", videoFileName: "v2", description: Workout2.fetchWorkout2(), thumbnailFileName: "v2")

    return [v1, v2]
}
}

struct Workout1 {

let excerciseName: String
let sets: Int
let reps: Int

static func fetchWorkout1() -> [Workout1] {

    let w1 = Workout1(excerciseName: "Bench Press", sets: 3, reps: 8)
    let w2 = Workout1(excerciseName: "Push Press", sets: 3, reps: 8)
    let w3 = Workout1(excerciseName: "Squat", sets: 3, reps: 8)
    let w4 = Workout1(excerciseName: "Deadlift", sets: 3, reps: 8)
    let w5 = Workout1(excerciseName: "Bicep Curl", sets: 3, reps: 8)
    let w6 = Workout1(excerciseName: "Tricep Pushdown", sets: 3, reps: 8)



    return [w1,w2,w3,w4,w5,w6]
}


}

struct Workout2 {

let excerciseName: String
let sets: Int
let reps: Int

static func fetchWorkout2() -> [Workout2] {

    let e1 = Workout2(excerciseName: "Bench Press", sets: 5, reps: 15)
    let e2 = Workout2(excerciseName: "Push Press", sets: 3, reps: 3)
    let e3 = Workout2(excerciseName: "Squat", sets: 5, reps: 5)
    let e4 = Workout2(excerciseName: "Deadlift", sets: 3, reps: 3)
    let e5 = Workout2(excerciseName: "Bicep Curl", sets: 5, reps: 15)
    let e6 = Workout2(excerciseName: "Tricep Pushdown", sets: 5, reps: 15)



    return [e1,e2,e3,e4,e5,e6]
}

}

这是ViewController接收信息并显示“锻炼或例程”中某些信息的类。

import Foundation
import UIKit


class WorkoutsListViewController: UITableViewController {

override func viewDidLoad() {
    super.viewDidLoad()
    UINavigationBar.appearance().barTintColor = #colorLiteral(red: 0.4274509804, green: 0.4745098039, blue: 0.5764705882, alpha: 1)

}

var routines: [Routines] = Routines.fetchRoutines()
var workoutSelected = [Any]()

override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {

    return routines.count
}

override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {

    let cell = tableView.dequeueReusableCell(withIdentifier: "VideoCell", for: indexPath) as! WorkoutsListTableViewCell
    let routine = routines[indexPath.row]
    cell.routine = routine
    return cell
}

override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    let routine = routines[indexPath.row]
    print(routine.routineName)
    workoutSelected = routine.description
    print(workoutSelected)
    /*WorkoutsListViewController.workoutSelected = routine.description
    print(WorkoutsListViewController.workoutSelected)
    */


    tableView.deselectRow(at: indexPath, animated: true)
    performSegue(withIdentifier: "segueToWorkout", sender: self)
}

override func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) {
    cell.backgroundColor = UIColor.clear
}


}

这是我希望能够使用该数组并显示信息的地方！

import Foundation
import UIKit


class WorkoutViewController: UITableViewController {

override func viewDidLoad() {
    super.viewDidLoad()
    view.backgroundColor = #colorLiteral(red: 0.8352941176, green: 0.8352941176, blue: 0.8352941176, alpha: 1)
}


var workouts: [Workout1] = Workout1.fetchWorkout1()
//var workoutSelected = WorkoutsListViewController.workoutSelected



override func numberOfSections(in tableView: UITableView) -> Int {
    return 1
}


override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return workouts.count
}


override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {

    let cell = tableView.dequeueReusableCell(withIdentifier: "workoutCell", for: indexPath)
    let workout = workouts[indexPath.row]
    cell.textLabel?.text = workout.excerciseName
    cell.textLabel?.textColor = UIColor.black

    return cell


}



override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {

    let workout = workouts[indexPath.row]
    tableView.deselectRow(at: indexPath, animated: true)
    print("Do \(workout.sets) sets of \(workout.reps) reps of \(workout.excerciseName)")
}

override func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) {
    cell.backgroundColor = UIColor.clear
}

}

Answer 1

在didSelectRowAt中将索引路径作为sender的{{1}}参数传递

performSegue

然后覆盖override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) { tableView.deselectRow(at: indexPath, animated: true) performSegue(withIdentifier: "segueToWorkout", sender: indexPath) }，以将锻炼数组传递给目标控制器。

prepare(for segue

顺便说一下，您的结构非常混乱。为什么不对两个锻炼数组都使用一个结构，这样就避免了丑陋的override func prepare(for segue: UIStoryboardSegue, sender: Any?) { if segue.identifier == "segueToWorkout" { let destinationController = segue.destination as! WorkoutViewController let indexPath = sender as! IndexPath let routine = routines[indexPath.row] destinationController.workouts = routine.description } }声明

Any

然后在struct Workout { let excerciseName: String let sets: Int let reps: Int static func fetchWorkout1() -> [Workout] { return [Workout(excerciseName: "Bench Press", sets: 3, reps: 8), Workout(excerciseName: "Push Press", sets: 3, reps: 8), Workout(excerciseName: "Squat", sets: 3, reps: 8), Workout(excerciseName: "Deadlift", sets: 3, reps: 8), Workout(excerciseName: "Bicep Curl", sets: 3, reps: 8), Workout(excerciseName: "Tricep Pushdown", sets: 3, reps: 8)] } static func fetchWorkout2() -> [Workout] { return [Workout(excerciseName: "Bench Press", sets: 5, reps: 15), Workout(excerciseName: "Push Press", sets: 3, reps: 3), Workout(excerciseName: "Squat", sets: 5, reps: 5), Workout(excerciseName: "Deadlift", sets: 3, reps: 3), Workout(excerciseName: "Bicep Curl", sets: 5, reps: 15), Workout(excerciseName: "Tricep Pushdown", sets: 5, reps: 15)] } }中声明

Routines

和let description: [Workout]

中

WorkoutViewController

您必须在某个时候重新加载表视图，例如在var workouts = [Workout]()中，但永远不要使用viewWillAppear观察者。

Answer 2

解决了！感谢@vadrian。

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    if segue.identifier == "segueToWorkout" {
        let destinationController = segue.destination as! UINavigationController
        let indexPath = sender as! IndexPath
        let routine = routines[indexPath.row]
        let dvc = destinationController.topViewController as! WorkoutViewController
        svc.workouts = routine.description
    }
}

在其他课程中使用用户选择的Struct

2 个答案: