循环写入领域

Question

我正在通过这个对象类在 Realm 中存储锻炼信息：

class Workout: Object {

    @objc dynamic var date: Date?
    @objc dynamic var name: String?
    @objc dynamic var exercise: String?
    @objc dynamic var sets = 0
    @objc dynamic var reps = 0
    @objc dynamic var kg: Double = 0.0
    @objc dynamic var notes: String?
}

我将数据存储为一个数组，我想将其写入 Realm，如下所示：

var workoutName = ""
var exercises = [String]()
var sets = [Int]()
var reps = [Int]()
var kg = [Double]()
var notes = [String]()

@IBAction func saveWorkoutButton(_ sender: Any) {

    let realm = try! Realm()

    print(Realm.Configuration.defaultConfiguration.fileURL!)

    let currenDate = Date() // Get the current date

    let myWorkout = Workout()
    myWorkout.date = currenDate
    myWorkout.name = workoutName

    for i in 0 ..< exercises.count {
        myWorkout.exercise = exercises[i]
        myWorkout.sets = sets[i]
        myWorkout.reps = reps[i]
        myWorkout.kg = kg[i]
        myWorkout.notes = notes[i]

        realm.add(myWorkout)
    }

    try! realm.write {
        realm.add(myWorkout)
    }
}

这种情况下的问题是，在运行realm.write ... 时，它只添加了for i in 0 函数的最后一个值。我尝试将realm.write 函数放在for i in 0 循环中，但随后它崩溃了。每个数组都包含相等数量的对象。有什么想法吗？

Answer 1

你可以试试这个代码：

var myWorkouts:[Workout] = []
for i in 0 ..< exercises.count {
    let myWorkout = Workout()
    myWorkout.date = currenDate
    myWorkout.name = workoutName
    myWorkout.exercise = exercises[i]
    myWorkout.sets = sets[i]
    myWorkout.reps = reps[i]
    myWorkout.kg = kg[i]
    myWorkout.notes = notes[i]
    myWorkouts.append(myWorkout)
}

try! realm.write {
    realm.add(myWorkouts)
}

如果可能，您应该只 add 和 write 一次以优化性能。 希望这会有所帮助。