ios - UIPickerView 默认行

Question

如果我想在 View Controller 以 [2] 或任何其他行号开始时拥有默认行，我该如何实现？

var pickerData = ["2x2","4x4","6x6","8x8","12x12"]    


override func viewDidLoad() {
    super.viewDidLoad()

    totalTilesLabel.text = pickerData[8]

    
    display.text = sentData
    self.picker.delegate = self
    self.picker.dataSource = self

}

这是 UIPicker 数据源和委托(delegate)。

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) {

}

Answer 1

在 viewDidLoad 方法中将选取器 View 的选定行设置为您想要的任何初始行。这是 Swift 3 代码。根据需要针对 Swift 2 进行调整。

self.picker.selectRow(8, inComponent: 0, animated: false)