Question

我的应用中有很多UIPickers。我让他们设置当用户点击文本控件时，出现选择器，用户可以选择一个值。然后该值显示在文本字段中，但我希望在UIPicker出现时使用初始值填充文本字段。目前，在用户物理移动选择器之前，不会填充文本字段。

代码：

-(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
{
    if([pickerView isEqual: routePicker])
    {
        route.text = [[routeArray objectAtIndex:row] valueForKey:@"route_name"];
    } 
    else if([pickerView isEqual: timePicker])
    {
        if (component == 0)
        {
            selectedHour = [hourArray objectAtIndex:row];
        } 
        else if (component == 1)
        {
            selectedMinute = [minuteArray objectAtIndex:row];
        } 
        else if (component == 2)
        {
            selectedSecond = [secondArray objectAtIndex:row];
        }
        time.text = [NSString stringWithFormat:@"%@:%@:%@", selectedHour, selectedMinute, selectedSecond];
    }
    else if([pickerView isEqual: activityPicker])
    {
        activity.text = [activityArray objectAtIndex:row];
    }
    else if([pickerView isEqual: intensityPicker])
    {
        intensity.text = [intensityArray objectAtIndex:row];
    }
}

此致斯蒂芬

Answer 1

在textfield委托方法上在打开选择器之前

- (void)textFieldDidBeginEditing:(UITextField *)textField
{
 if(textField.tag==kINTENSITYTEXTTAG)
 {
  if(![intensity.text length])
  {
   intensity.text = [intensityArray objectAtIndex:0];
  }
 }
// SAME FOR REMAINING textFields Based on the tag to get which textfield is selected
}

快乐的编码......

在UIPicker中设置初始值

1 个答案: