最新消息:20190717 VPS服务器:Vultr新加坡,WordPress主题:大前端D8,统一介绍入口:关于

[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

iOS crifan 1308浏览 0评论

折腾:

[已解决]swift实现左右联动选择

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

发表我的评论
取消评论

表情

Hi,您需要填写昵称和邮箱!

  • 昵称 (必填)
  • 邮箱 (必填)
  • 网址
68 queries in 0.136 seconds, using 18.86MB memory