UIPickerView行颜色

Question

有谁知道如何在iPhone SDK的UIPickerView控件中更改行（或行背景）的颜色？ 与下面的标题类似，但是我也想更改行的颜色：

- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component;

谢谢。

Answer 1

谢谢诺亚，这正是我所需要的。 我想在这里添加代码，以防万一其他人需要（或想评论:)

- (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view {

    CGRect imageFrame = CGRectMake(0.0, 0.0, 15, 15);
    UIImageView *label = [[[UIImageView alloc] initWithFrame:imageFrame] **autorelease**];

    if (row == 0)
    {
        label.backgroundColor = [UIColor redColor];
    }
    if (row == 1)
    {
        label.backgroundColor = [UIColor blueColor];
    }
    if (row == 2)
    {
        label.backgroundColor = [UIColor blackColor];
    }   
    return label;
}

Answer 2

您可以在委托的-pickerView：viewForRow：forComponent：reusingView：方法中返回任意视图，在此处记录 。

Answer 3

我根据肖恩的答案实现了以下内容：

- (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view
{
    CGRect rowFrame = CGRectMake(00.0f, 0.0f, [pickerView viewForRow:row forComponent:component].frame.size.width, [pickerView viewForRow:row forComponent:component].frame.size.height);
    UILabel *label = [[UILabel alloc] initWithFrame:rowFrame];
    label.font = [UIFont boldSystemFontOfSize:18.0f];

    // This is an array I pass to the picker in prepareForSegue:sender:
    label.text = [self.values objectAtIndex:row];
    label.textAlignment = UITextAlignmentCenter;

    // This is an array I pass to the picker in prepareForSegue:sender:
    if ([self.backgroundColors count]) {
        label.backgroundColor = [self.backgroundColors objectAtIndex:row];

        // self.lightColors is an array I instantiate in viewDidLoad: self.lightColors = @[ [UIColor yellowColor], [UIColor greenColor], [UIColor whiteColor] ];
        label.textColor = [self.lightColors containsObject:label.backgroundColor] ? [UIColor blackColor] : [UIColor whiteColor];
    } else {
        label.textColor = [UIColor blackColor];
    }

    return label;
}

Answer 4

-(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component{

    UILabel *labelSelected = (UILabel*)[pickerView viewForRow:row forComponent:component];
    [labelSelected setTextColor:[UIColor redColor]];

}

和

- (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view{

    UILabel *label = (id)view;

    if (!label){

      label=[[UILabel alloc]init];
      label.textAlignment = NSTextAlignmentCenter;
      pickerView.backgroundColor=[UIColor whiteColor];
      label.text=[self pickerView:pickerView titleForRow:row forComponent:component];
      label.textColor=[UIColor grayColor];

    }
    return label;
}

Answer 5

做这个：

label.backgroundColor = [UIColor yourcolorColor];