I try it on this way, but it do not work. Can someone help me? Thank you.
func numberOfComponents( in pickerview: UIPickerView) -> Int {
pickerJahrgang.tag = 0
pickerTestjahr.tag = 1
pickerSprint.tag = 2
pickerKilmmhang.tag = 3
picker1000m.tag = 4
if pickerJahrgang.tag == 0 {return 1}
if pickerSprint.tag == 1 {return 3}
if pickerTestjahr.tag == 2 {return 1}
if pickerKilmmhang.tag == 3 {return 2}
if picker1000m.tag == 4 {return 3}
else {
return 1
}
}