在uipickerview中选择时如何更改文本颜色？

Question

我想更改 uipickerview 的选择所在行的颜色。还有另一个这样的问题，但唯一的答案是显示如何将 uipickerview 中的所有文本更改为某种颜色。我只是希望在查看器中选择文本时显示不同的颜色。

-(UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent: (NSInteger) component reusingView:(UIView *)view
{
    NSString *rowItem =[thing objectAtIndex:row];
    UILabel *lblRow = [[UILabel alloc] initWithFrame:CGRectMake(0.0f, 0.0f, [pickerView bounds].size.width, 44.0f];
    [lblRow setTextColor: [UIColor grayColor]];
    [lblRow setTextAlignment:NSTextAlignmentCenter];
    [lblRow setText:rowItem];

    [lblRow setBackgroundColor:[UIColor clearColor];

    return lblRow;

}

Answer 1

改用这个委托方法怎么样：

- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
{
    NSString *rowItem =[thing objectAtIndex:row];
    UILabel *lblRow = [[UILabel alloc] initWithFrame:CGRectMake(0.0f, 0.0f, [pickerView bounds].size.width, 44.0f];
    [lblRow setTextColor: [UIColor grayColor]];
    [lblRow setTextAlignment:NSTextAlignmentCenter];
    [lblRow setText:rowItem];

    [lblRow setBackgroundColor:[UIColor clearColor];
}