使用带 swift 的选择器视图的随机名称选择器

Question

我正在尝试使用标签中的文本填充选取器视图。我试过在网上和书中搜索如何做到这一点，但还没有成功。我到目前为止没有显示任何错误，但仍然不会运行

谢谢

导入 UIKit

class ViewController: UIViewController, UIPickerViewDelegate,UIPickerViewDataSource,UITextFieldDelegate{

@IBOutlet weak var label3: UILabel!

@IBOutlet weak var label2: UILabel!

@IBOutlet weak var label: UILabel!

@IBOutlet weak var textField: UITextField!

@IBOutlet weak var textField2: UITextField!

@IBOutlet weak var textField3: UITextField!


@IBAction func button(sender: UIButton) {

    label.text = textField.text
    label2.text = textField2.text
    label3.text = textField3.text
    self.textField.resignFirstResponder()
    self.textField2.resignFirstResponder()
    self.textField3.resignFirstResponder()
}

func textFieldShouldReturn(textField: UITextField) -> Bool {
    textField.resignFirstResponder()
    return false
}
override func touchesBegan(touches: NSSet, withEvent event: UIEvent) {
    self.view.endEditing(true)
}


var pickerLabels: [UILabel!] {

    return [label,label2,label3]
}

func numberOfComponentsInPickerView(pickerView: UIPickerView) -> Int{
     return 1
}

func pickerView(pickerView: UIPickerView, numberOfRowsInComponent component:Int) -> Int{
    return pickerLabels.count
}

func pickerView(pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> NSArray{

return pickerLabels

}

override func viewDidLoad() {
   super.viewDidLoad()
   // Do any additional setup after loading the view, typically from a nib.

    }

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.

}

}

Answer 1

您正在向阵列发送 UILabels。我相信您要实现的目标需要您从 UILabels 获取文本，并在您计算的属性..

上将数组格式化为 [String]

var pickerLabels: [String!] {

    return [label.text, label2.text, label3.text]
}

使用带 swift 的选择器视图的随机名称选择器

Random name selector using a picker view with swift

swift

xcode6