折腾：
期间，
选择左边的一行后，右边的一列的内容，没有更新：
注：此处左边选择了活动，右边应该会更新内容的
swift uipickerview select left update right
ios – Show data in UIPickerView second component based on first component selection – Stack Overflow
经过一番折腾和参考别人代码
– (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
{
switch (component) {
case 0:
{
self.selectedContinent = (self.continents)[(NSUInteger) row];
[pickerView reloadComponent:1];
self.selectedCity = [self getCitiesByContinent:self.selectedContinent][(NSUInteger) [pickerView selectedRowInComponent:1]];
return;
}
case 1:
self.selectedCity = [self getCitiesByContinent:self.selectedContinent][(NSUInteger) row];
return;
default:break;
}
}
最后发现是：
需要在
didSelectRow
去reload对应的列：
pickerView.reloadComponent(1)
即可。
对应代码：
func pickerView(pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
gLog.verbose(“pickerView=\(pickerView), row=\(row), component=\(component)”)
var curTitle = “”
switch component {
case 0:
curTitle = gCurUserItem.customerSourceList[row].text
case 1:
if row < gCurUserItem.customerSourceList[selectedFirstLevelSourceIndex].subSourceList.count {
curTitle = gCurUserItem.customerSourceList[selectedFirstLevelSourceIndex].subSourceList[row].text
}
default:
break
}
gLog.verbose(“curTitle=\(curTitle)”)
return curTitle
}
func pickerView(pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
gLog.verbose(“pickerView=\(pickerView), row=\(row), component=\(component)”)
if row != selectedFirstLevelSourceIndex {
gLog.verbose(“selectedFirstLevelSourceIndex=\(selectedFirstLevelSourceIndex), row=\(row)”)
selectedFirstLevelSourceIndex = row
pickerView.reloadComponent(1)
}
return
}
效果：
当左边选择到活动，即可刷新右边的内容了：
但是有个问题：
右边选择第二行（上海2016车展）时，整个右边的内容就消失了：
然后继续调试，最后改为：
func pickerView(pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
gLog.verbose(“pickerView=\(pickerView), row=\(row), component=\(component)”)
if component == 0 {
if row != selectedFirstLevelSourceIndex {
gLog.verbose(“selectedFirstLevelSourceIndex=\(selectedFirstLevelSourceIndex), row=\(row)”)
selectedFirstLevelSourceIndex = row
pickerView.reloadComponent(1)
}
}
return
}
即可：
转载请注明：在路上 » ［已解决］ActionSheetPicker的PickerView中实现左右联动选择：选择左边一行后整个右边列表内容都更新