我正在尝试向我的 iPhone 应用程序添加一个 pickerview,但它没有显示数组中的字符串,而是显示了问号。有谁知道为什么?在过去的一个小时里,我一直在努力解决这个问题……这是我的包含 pickerview 的 Controller 代码:
class NewIssueViewController: UIViewController, UIPickerViewDelegate {
var componentArr = ["component1","component2","component3","component4"]
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
@IBAction func CancelPressed(sender: AnyObject) {
self.dismissViewControllerAnimated(true, completion: nil)
}
@IBAction func AddPressed(sender: AnyObject) {
self.dismissViewControllerAnimated(true, completion: nil)
}
func numberOfComponentsInPickerView(pickerView: UIPickerView!) -> Int {
return 1
}
func pickerView(pickerView: UIPickerView!, numberOfRowsInComponent component: Int) -> Int {
return componentArr.count
}
func pickerView(pickerView: UIPickerView!, titleForRow row: Int, forComponent component: Int) -> String! {
return componentArr[row]
}
}
最佳答案
您设置了选择器 View 的数据源,但没有设置它的委托(delegate)。
因此 pickerView:titleForRow:
永远不会被调用。
关于iphone - pickerView 显示为问号而不是数据?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/26747115/