[英]Error: Type 'GearViewController' does not conform to protocol 'UIPickerViewDataSource'
[英]iOS - Error Type 'ViewController' does not conform to protocol 'UIPickerViewDataSource'
我做了很多搜索,但我找不到解决问题的方法。 这是斯威夫特的第一年,所以请不要“太高级”。
这是我的代码:
class SecondViewController: UIViewController, UITextFieldDelegate, UIPickerViewDataSource, UIPickerViewDelegate {
// Properties
@IBOutlet weak var name_tf: UITextField!
@IBOutlet weak var artist_tf: UITextField!
@IBOutlet weak var sort_pkr: UIPickerView!
@IBOutlet weak var sort_lbl: UILabel!
@IBOutlet weak var sorted_lbl: UILabel!
@IBOutlet weak var next_lbl: UILabel!
let pickerData = ["Song name","Artist"]
func numberOfComponentsInPickerView(pickerView: UIPickerView) -> Int {
return 1
}
func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
return pickerData.count
}
func pickerView(pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
return pickerData[row]
}
func pickerView(pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
sort_lbl.text = pickerData[row]
}
override func viewDidLoad() {
super.viewDidLoad()
let pickerView = UIPickerView()
pickerView.delegate = self
pickerView.dataSource = self
// 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.
}
我有一种感觉,我没有把我的功能放在正确的位置。
对于Swift 3 ,请使用以下函数:
func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
}
func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
}
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