我在尝试从一个View Controller到另一个View Controller中获取一些变量时遇到了很多问题。我怎么能正确地做到这一点?
这是我下面的代码。这是视图控制器,我希望能够将变量RedScoreW
和BlueScoreW
发送到下一个窗口。我正在询问如何使用SWIFT语言,特别是WATCHOS应用程序。
class InterfaceController2: WKInterfaceController {
var RedScoreW = 0
var BlueScoreW = 0
@IBOutlet var WatchRedScoreLabel: WKInterfaceLabel!
@IBOutlet var WatchBlueScoreLabel: WKInterfaceLabel!
@IBAction func RedScorePlus() {
if RedScoreW == 999 {
RedScoreW = 0
WatchRedScoreLabel.setText("0")
}else {
RedScoreW += 1
WatchRedScoreLabel.setText(String(RedScoreW))
}
}
@IBAction func RedScoreMinus() {
if RedScoreW == 0 {
RedScoreW = 999
WatchRedScoreLabel.setText("999")
}
else {
RedScoreW -= 1
WatchRedScoreLabel.setText(String(RedScoreW))
}
}
@IBAction func BlueScorePlus() {
if BlueScoreW == 999 {
BlueScoreW = 0
WatchBlueScoreLabel.setText("0")
} else{
BlueScoreW += 1
WatchBlueScoreLabel.setText(String(BlueScoreW))
}
}
@IBAction func BlueScoreMinus() {
if BlueScoreW == 0 {
BlueScoreW = 999
WatchBlueScoreLabel.setText("999")
}
else {
BlueScoreW -= 1
WatchBlueScoreLabel.setText(String(BlueScoreW))
}
}
override func awakeWithContext(context: AnyObject?) {
super.awakeWithContext(context)
WatchRedScoreLabel.setText(String(RedScoreW))
WatchBlueScoreLabel.setText(String(BlueScoreW))
// Configure interface objects here.
}
override func willActivate() {
// This method is called when watch view controller is about to be visible to user
super.willActivate()
}
override func didDeactivate() {
// This method is called when watch view controller is no longer visible
super.didDeactivate()
}
}
这是我希望能够使用RedScoreW和BlueScoreW变量的目标视图控制器。
class InterfaceController3: WKInterfaceController {
@IBOutlet var finalRedScoreLabel: WKInterfaceLabel!
@IBOutlet var finalBlueScoreLabel: WKInterfaceLabel!
@IBAction func DoneAndResetButton() {
self.popToRootController()
}
override func awakeWithContext(context: AnyObject?) {
super.awakeWithContext(context)
// Configure interface objects here.
}
override func willActivate() {
// This method is called when watch view controller is about to be visible to user
super.willActivate()
}
override func didDeactivate() {
// This method is called when watch view controller is no longer visible
super.didDeactivate()
}
}
*编辑*
我试图这样做,这是我发送它的代码,检查:
@IBAction func FinishButtonPushVariables() {
arrayofScores[0] = RedScoreW
arrayofScores[1] = BlueScoreW
pushControllerWithName("LastScreen", context: arrayofScores)
}
这是我收到它的地方......它不起作用。 LOL
@IBOutlet var finalRedScoreLabel: WKInterfaceLabel!
@IBOutlet var finalBlueScoreLabel: WKInterfaceLabel!
@IBAction func DoneAndResetButton() {
self.popToRootController()
}
override func awakeWithContext(context: AnyObject?) {
super.awakeWithContext(context)
let finalarrayofScores = context as? InterfaceController2
finalBlueScoreLabel.setText(String(finalarrayofScores!.arrayofScores[1]))
finalRedScoreLabel.setText(String(finalarrayofScores!.arrayofScores[0]))
// Configure interface objects here.
}
答案 0 :(得分:4)
在iOS应用中,我们使用prepareForSegue
来执行此操作。在watchOS应用程序中,我们使用contextForSegueWithIdentifier
将上下文从一个interfaceController传递给另一个。
以下是class reference的链接,详细介绍了这一点。但这里有基础知识:
可以使用两种不同的方法。一种是从一个接口控制器转到另一个接口控制器:
func contextForSegueWithIdentifier(_ segueIdentifier: String) -> AnyObject?
另一个用于在点击表格中的行时从一个界面控制器转到另一个 :
func contextForSegueWithIdentifier(_ segueIdentifier: String, inTable table: WKInterfaceTable, rowIndex rowIndex: Int) -> AnyObject?
因此,这两个方法中的一个将放在发送上下文的interfaceController中,您将在接收interfaceController的awakeWithContext
方法中接收该上下文。
这是一个link教程,将显示此过程的应用程序。
修改强>
以下是您问题的具体解决方案。
在您发送它的接口控制器中,输入以下代码:
override func contextForSegueWithIdentifier(segueIdentifier: String) -> AnyObject? {
arrayofScores[0] = RedScoreW
arrayofScores[1] = BlueScoreW
return arrayOfScores
}
然后在目标接口控制器中输入以下代码:
override func awakeWithContext(context: AnyObject?) {
super.awakeWithContext(context)
let finalArrayOfScores = context as? [Int]
if let f = finalArrayOfScores {
finalBlueScoreLabel.setText(String(f[1]))
finalRedScoreLabel.setText(String(f[0]))
}
}
答案 1 :(得分:2)
您需要先设置变量来保存变量。
class YourSecondViewController: UIViewController {
var yourVariable:Double?
}
然后让您的按钮触发您的自定义segue。使用您的变量作为发件人的参数。
class YourFirstViewController: UIViewController {
@IBAction func buttonTapped(sender: AnyObject) {
self.performSegueWithIdentifier("segue", sender: yourVariable)
}
}
然后通过覆盖prepareForSegue方法传递发件人数据:
override func prepareForSegue(segue: UIStoryboardSegue!, sender: AnyObject!) {
if (segue.identifier = "segue") {
let secondViewController = segue.destinationViewController as YourSecondViewController
let yourVariable = sender as Double
secondViewController.duration = yourVariable
}
}
答案 2 :(得分:1)
我猜您的问题是您将数组传递给上下文并将其转换为WKIntefaceController。 尝试替换此行
let finalarrayofScores = context as? InterfaceController2
通过
let finalarrayofScores = context as? [Int]