ios - XIB 中 UIImage 的色调

Question

我尝试了不同的方法，但没有找到这个问题的答案。 有没有办法对 XIB 文件中 UIImageView 定义的图像进行着色？

谢谢

Answer 1

这有效

- (UIImage *)imageWithBurnTint:(UIColor *)color
{
    UIImage *img = self;

    // lets tint the icon - assumes your icons are black
    UIGraphicsBeginImageContextWithOptions(img.size, NO, 0.0);
    CGContextRef context = UIGraphicsGetCurrentContext();

    CGContextTranslateCTM(context, 0, img.size.height);
    CGContextScaleCTM(context, 1.0, -1.0);

    CGRect rect = CGRectMake(0, 0, img.size.width, img.size.height);

    // draw alpha-mask
    CGContextSetBlendMode(context, kCGBlendModeNormal);
    CGContextDrawImage(context, rect, img.CGImage);

    // draw tint color, preserving alpha values of original image
    CGContextSetBlendMode(context, kCGBlendModeSourceIn);
    [color setFill];
    CGContextFillRect(context, rect);

    UIImage *coloredImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();

    return coloredImage;

}

然后

[anImageViewInXib setImage:[center.image imageWithBurnTint:[UIColor blackColor]]];