以编程方式设置 WKPickerItem 不会超过某个值？

Question

想不通，通过下面的代码，我让用户在 WKPickerItem 上设置一个值，将其存储在 UserDefaults，然后在下次 [=] 时加载它13=] 已加载并尝试使用存储的值设置 PickerItem。问题是，如果我将该值设置为 1 - 7，然后导航回来然后再次点击以显示此界面控制器，我会在 InterfacePicker 中看到正确的值。但是，如果我将它设置为 8、9 或 10，InterfacePicker 只会上升到 7？正确的索引和项目打印到控制台，只是 UI 中的实际值是错误的？

import WatchKit
import Foundation


class SettingsInterfaceController: WKInterfaceController {

    let defaults = UserDefaults.standard


    var shiftTimerHapticIntervalOptions = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]

    var userShiftTimerHapticInterval = 10


    @IBOutlet var shiftTimerHapticIntervalPicker: WKInterfacePicker!


    @IBAction func shiftTimerHapticIntervalDidChange(_ value: Int) {
         WKInterfaceDevice.current().play(.click)
        userShiftTimerHapticInterval = shiftTimerHapticIntervalOptions[value]
    }


    override func awake(withContext context: Any?) {
        super.awake(withContext: context)

        let shiftTimerHapticIntervalPickerItems: [WKPickerItem] = shiftTimerHapticIntervalOptions.map {
            let pickerItem = WKPickerItem()
            pickerItem.caption = [=10=].description
            pickerItem.title = [=10=].description
            return pickerItem
        }

        shiftTimerHapticIntervalPicker.setItems(shiftTimerHapticIntervalPickerItems)

    }

    override func willActivate() {
        // This method is called when watch view controller is about to be visible to user
        super.willActivate()

        // Look up user settings

        if let userShiftTimerHapticIntervalUnwrapped = defaults.value(forKey: userShiftTimerHapticIntervalKey) as? Int {
            userShiftTimerHapticInterval = userShiftTimerHapticIntervalUnwrapped
            if let indexOfUserShiftTimerHapticInterval = shiftTimerHapticIntervalOptions.index(of: userShiftTimerHapticInterval) {                shiftTimerHapticIntervalPicker.setSelectedItemIndex(indexOfUserShiftTimerHapticInterval)
            }
        }
    }

    override func didDeactivate() {
        // This method is called when watch view controller is no longer visible
        super.didDeactivate()

        defaults.set(userShiftTimerHapticInterval, forKey: userShiftTimerHapticIntervalKey)

    }

}

Answer 1

尝试调用

shiftTimerHapticIntervalPicker.setSelectedItemIndex(indexOfUserShiftTimerHapticInterval)

在 InterfaceController 的 didAppear() 函数中，而不是在 willActivate() 函数中。当试图在 willActivate() 函数中设置选择器的索引时，我看到了一些相同的东西，但更随机。

以编程方式设置 WKPickerItem 不会超过某个值？

Programmatically setting WKPickerItem won't go above a certain value?

ios

swift

watchkit

wkinterfacecontroller

watchos-4