Swift UIPickerView Trigger与IBAction争论

Question

我是Swift新手，可以使用一些关于如何使用按钮单击时使用IBAction来触发segue的建议。我能够继续使用选取器，但我希望按钮触发赛格。我尝试触发IBAction内部的函数，但这不起作用。欣赏任何建议。谢谢。

func pickerView(pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) { 

    switch (row) { 

    case 0: self.performSegueWithIdentifier("Segue0", sender: self) 
    break; 
    case 1: self.performSegueWithIdentifier("Segue1", sender: self) 
    break; 
    case 2: self.performSegueWithIdentifier("Segue2", sender: self) 
    break; 
    case 3: self.performSegueWithIdentifier("Segue3", sender: self) 
    break; 
    case 4: self.performSegueWithIdentifier("Segue4", sender: self) 
    break; 
    default: break; 

    } 

下面是标准按钮：

@IBAction func selectButton(sender: AnyObject) { 


} 

Answer 1

如果你正在寻找的是如何确定哪一行从按钮功能内选择，你可以使用UIPickerView.selectedRowInComponent(_:):

self.performSegueWithIdentifier("Segue\(row)", sender: self) 

：

@IBOutlet weak var picker: UIPickerView! // Reference to picker from storyboard. 
@IBAction func selectButton(sender: AnyObject) { 
    // Get the selected row. You only have one component, so the parameter is 0. 
    let row = picker.selectedRowInComponent(0) 

    // Switch block here 
} 

事实上，如果你的塞格斯实际上名为“Segue0”，“Segue1”，等等，那么你就可以更换开关块

但是，如果你使用更具描述性的名称赛格瑞（因为我希望你是），那么你也可以在存储阵列中的SEGUE标识符和只使用row作为索引到数组：

let segues = ["thisIsASegue", "thisIsAnotherSegue", "etc"] 

// In the function: 
self.performSegueWithIdentifier(segues[row], sender: self) 

Answer 2

我管理这个工作使用下面的就搞定了。希望有任何意见或更优雅的解决方案。 :)

增加了一个全局变量来保存选择的机行：

var rowSelected = 0 
var pickerData: [String] = [String]() 

override func viewDidLoad() { 
    super.viewDidLoad() 

    // Connect data: 
    self.locationPicker.delegate = self 
    self.locationPicker.dataSource = self 

pickerData = ["Location 1", "Location 2", "Location 3", "Location 4", "Location 5"] 

// The number of columns of data 
func numberOfComponentsInPickerView(pickerView: UIPickerView) -> Int { 
    return 1 
} 

// The number of rows of data 
func pickerView(pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int { 
    return pickerData.count 
} 

// The data to return for the row and component (column) that's being passed in 
func pickerView(pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? { 
    return "\(pickerData[row])" 

} 
// Capture the picker view selection 
func pickerView(pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) { 

    rowSelected = row 


} 
@IBAction func selectButton(sender: AnyObject) { 

    switch (rowSelected) { 

    case 0: self.performSegueWithIdentifier("Segue0", sender: self) 
    break; 
    case 1: self.performSegueWithIdentifier("Segue1", sender: self) 
    break; 
    case 2: self.performSegueWithIdentifier("Segue2", sender: self) 
    break; 
    case 3: self.performSegueWithIdentifier("Segue3", sender: self) 
    break; 
    case 4: self.performSegueWithIdentifier("Segue4", sender: self) 
    break; 
    default: break; 




}