在選取器視圖中更改字體大小和樣式

Question

如何更改選取器視圖的字體樣式和大小？我在拾取器視圖設置中看不到選項。你能以編程方式設置它嗎？我正在使用swift 3和 xcode 8.2。

Answer 1

您可以更改字體樣式和大小的功能：

func pickerView(_ pickerView: UIPickerView, viewForRow row: Int, forComponent component: Int, reusing view: UIView?) -> UIView 

例如：

let pickerDataSource: [String] = (1...10).map { "Option " + String(format: "%2d", $0)} 

func pickerView(_ pickerView: UIPickerView, viewForRow row: Int, forComponent component: Int, reusing view: UIView?) -> UIView { 
    let label = (view as? UILabel) ?? UILabel() 

    label.textColor = .red 
    label.textAlignment = .center 
    label.font = UIFont.systemFont(ofSize: 20) 

    label.text = pickerDataSource[row] 

    return label 
    } 
}