ios – UIButtonTypeDetailDisclosure颜色变化

我已将uIButtonTypeDetailDisclosure的图像更改为下图,但问题是图像变为蓝色.我的问题在哪里？

- (MKAnnotationView *)mapView:(MKMapView *)mV viewForAnnotation:(id <MKAnnotation>)Annotation
{
*infoButton = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];

[infoButton setImage:[UIImage imagenamed:@"carcar.png"] forState: UIControlStateNormal];

pinView.rightCalloutAccessoryView = infoButton;
}

上次更新：解决了上一个infoButton.frame.

UIButton *infoButton = [UIButton buttonWithType:UIButtonTypeCustom];

    UIImage *carImage = [UIImage imagenamed:@"carcar.png"];

    if ([carImage respondsToSELEctor:@SELEctor(imageWithRenderingMode:)])
    {
        carImage = [carImage imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
    }

    [infoButton setImage:carImage forState: UIControlStateNormal];

    infoButton.frame = CGRectMake(0,32,32);

    pinView.rightCalloutAccessoryView = infoButton;

infoButton = [UIButton buttonWithType:UIButtonTypeCustom];