在uipickerview中选择时如何更改文本颜色? [英] How to change text color when selected in uipickerview?

问题描述

我想更改 uipickerview 选择所在的行的颜色.还有另一个类似的问题，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.我只希望在查看器中选择文本时显示不同的颜色.

I want to change the color of the row that the selection of the uipickerview lands on. There is another question like this but the only answer is showing how to make all the text in the uipickerview changed to a certain color. I just want the text when selected in the viewer to appear a different color.

-(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;

}

推荐答案

如何改用这个委托方法:

How about using this delegate method instead:

- (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];
}

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