xcode 如何为 UIPickerView 添加边框？
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How to add a border to a UIPickerView?
提问by Matt Porter
How would you add a border to a UIPickerView? Cant seem to find any property for it. Is there some kind of work around?
你将如何为 UIPickerView 添加边框？似乎无法为它找到任何属性。有什么解决办法吗？
I actually have two UIPickerViews next to each other, if possible I would like to get a thin white border around the both of them!
我实际上有两个彼此相邻的 UIPickerViews，如果可能的话，我想在它们周围都有一个细的白色边框！
回答by Lyndsey Scott
As with any view, you can add a border by manipulating your UIPickerView's layer property, ex:
与任何视图一样，您可以通过操作您UIPickerView的图层属性来添加边框，例如：
// In Swift 3
picker.layer.borderColor = UIColor.white.cgColor
picker.layer.borderWidth = 1
// In Swift
picker.layer.borderColor = UIColor.whiteColor().CGColor
picker.layer.borderWidth = 1
// In Obj-C
picker.layer.borderColor = [UIColor whiteColor].CGColor;
picker.layer.borderWidth = 1;
回答by Naveed Khan
You can also use the delegate method to apply styles and css on DatePicker .. For example
您还可以使用委托方法在 DatePicker 上应用样式和 css .. 例如
func pickerView(pickerView: UIPickerView, viewForRow row: Int, forComponent component: Int, reusingView view: UIView?) -> UIView {
picker.layer.borderColor = UIColor.whiteColor().CGColor
picker.layer.borderWidth = 1
return view
}
This method will aplly all the properties on datepicker that is used in that particular view controller .
此方法将应用在该特定视图控制器中使用的 datepicker 上的所有属性。
