UIPickerView

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 2016/02/24   Share

使用UIPickerView时需要指定其datasource和delegate,并且实现UIPickerViewDelegate的

1	optional public func pickerView(pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String?

和UIPickerViewDataSource的

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public func numberOfComponentsInPickerView(pickerView: UIPickerView) -> Int

public func pickerView(pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int

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