我在设置 UIPickerView 时遇到问题。我已将其全部设置为教科书,我想更改字体大小,但是:
通过 attributedTitleForRow 更改字体大小没有效果(尽管更改颜色确实有效)
viewForRow 从不 被调用。 完全。
我正在使用 Xcode 8 和 Swift 2.3,目标是 iOS 8+。以下是所有相关的代码:
Interface Builder (IB) 连接:
@IBOutlet weak var synapse: UIPickerView!
链接到 UIViewController 的委托(delegate):
override func viewDidLoad() {
super.viewDidLoad()
// Préparation des gestionnaires de transition vers les différentes vues
self.transitionManagerNav.sourceViewController = self
self.transitionManagerNav.ordre = "travailleini2barrenav"
self.transitionManagerDesk.sourceViewController = self
self.transitionManagerDesk.ordre = "travailleini2desk"
self.synapse.dataSource = self
self.synapse.delegate = self
dateEnCours = graphique.pointDeReference.dateComplete
}
委托(delegate)实现:
// UIPICKERVIEWDELEGATE
func numberOfComponentsInPickerView(pickerView: UIPickerView) -> Int {
return 1
}
func pickerView(pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
return elementsDefileur.count
}
func pickerView(pickerView: UIPickerView, rowHeightForComponent component: Int) -> CGFloat {
return 17
}
func pickerView(pickerView: UIPickerView, widthForComponent component: Int) -> CGFloat {
return synapse.frame.width
}
func pickerView(pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
}
func pickerView(pickerView: UIPickerView, viewForRow row: Int, forComponent component: Int, reusing view: UIView?) -> UIView {
print("[viewForRow]") // THAT never happens (and yes, I am looking at the correct output window :o)
let pickerLabel = UILabel()
pickerLabel.textColor = UIColor.redColor()
pickerLabel.text = elementsDefileur[row]
pickerLabel.font = UIFont(name: "Arial-BoldMT", size: 5)
pickerLabel.textAlignment = NSTextAlignment.Left
return pickerLabel
}
我已经尝试了所有我能想到的,包括从代码中删除并重新创建 UIPickerView,然后从 (IB) 中删除,将委托(delegate)链接移动到 viewWillAppear,titleForRow/attributedTitleForRow/viewForRow 的每个组合,清理项目等.
我该如何解决这个问题?
最佳答案
您的委托(delegate)函数声明中的属性名称是错误的。它应该是'reusingView',而不是'reusing view':
func pickerView(pickerView: UIPickerView, viewForRow row: Int, forComponent component: Int, reusingView view: UIView?) -> UIView
我相信 Apple 文档包含错误。我遇到了同样的问题,并通过如上所述修复属性名称来修复它。
关于swift - UIPickerView:未调用 viewForRow,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/39665736/