swift5.0 UIPickerView基础使用

func addPickerView() {
// 选择器
self.pickerView = UIPickerView()
//因为该Controller中实现了UIPickerViewDataSource接口所以将dataSource设置成自己
self.pickerView.dataSource = self
//将delegate设置成自己
self.pickerView.delegate = self
//设置PickerView默认值,inComponent索引为0是选择pickerProvincesData数据，row为1是选择pickerProvincesData数据的索引为1的内容
self.pickerView.selectRow(1, inComponent: 0, animated: true)
//inComponent索引为1是选择pickerCitiesData数据，row为2是选择pickerCitiesData数据的索引为2的内容
self.pickerView.selectRow(2, inComponent: 1, animated: true)


self.view.addSubview(self.pickerView)
addAutoLayout(obj: self.pickerView)

//刷新所有数据
// self.pickerView.reloadAllComponents()
}