你如何在 Swift 中的视图控制器之间传递数据?

问题描述

我尝试在加载视图但未呈现数据时创建全局变量并更新信息.

I tried creating global variables and updating the information when the view is loaded but data isn't being rendered.

全局变量

var viewName:String = ""
var viewDuration:String = ""
var viewPeriod:String = ""
var viewMinAmp:String = ""
var viewMaxAmp:String = ""
var viewStep:String = ""
var viewType:String = ""

除了使用全局变量，还有没有更有效的信息传递方式?

Is there a more efficient way of passing information other than having global variables?

@IBOutlet var txtName: UITextField!
@IBOutlet var txtDuration: UITextField!
@IBOutlet var txtPeriod: UITextField!
@IBOutlet var txtMinAmp: UITextField!
@IBOutlet var txtMaxAmp: UITextField!
@IBOutlet var txtStep: UITextField!
@IBOutlet var txtType: UITextField!

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.
    setInfo(viewName, duration: viewDuration, period: viewPeriod, minAmp: viewMinAmp, maxAmp: viewMaxAmp, step: viewStep, type: viewType)
}

func setInfo(name: String, duration: String, period: String, minAmp: String, maxAmp: String, step: String, type: String) {
    txtName.text = name
    txtDuration.text = duration
    txtPeriod.text = period
    txtMinAmp.text = minAmp
    txtMaxAmp.text = maxAmp
    txtStep.text = step
    txtType.text = type
}

推荐答案

一种解决方案是从包含您希望传递给目标视图控制器的数据的视图控制器中覆盖 prepareForSegue(segue:sender:).

One solution would be to override prepareForSegue(segue:sender:) from within the view controller which contains the data that you wish to pass to the destination view controller.

override func prepareForSegue(segue: UIStoryboardSegue!, sender: AnyObject!) {
    if (segue.identifier == "YourSegueName") {
        //get a reference to the destination view controller
        let destinationVC:ViewControllerClass = segue.destinationViewController as! ViewControllerClass

        //set properties on the destination view controller
        destinationVC.name = viewName
        //etc...
    }
}

这篇关于你如何在 Swift 中的视图控制器之间传递数据?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！