Question

我需要照搬UIButton在被照搬时对形象的影响。见:

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最初的巴布亚新几内亚是一个具有甲型六氯环己烷背景的广场。当我把它描绘成UIButton的形象时,它自动对图像的非甲状腺素产生影响。

如何做到这一点?

Answer 1

你们可以通过一个简单的“UIImage”类别来实现这一点:

@interface UIImage (Tint)

- (UIImage *)tintedImageUsingColor:(UIColor *)tintColor;

@end

@implementation UIImage (Tint)

- (UIImage *)tintedImageUsingColor:(UIColor *)tintColor {
  UIGraphicsBeginImageContextWithOptions(self.size, NO, self.scale);
  CGRect drawRect = CGRectMake(0, 0, self.size.width, self.size.height);
  [self drawInRect:drawRect];
  [tintColor set];
  UIRectFillUsingBlendMode(drawRect, kCGBlendModeSourceAtop);
  UIImage *tintedImage = UIGraphicsGetImageFromCurrentImageContext();
  UIGraphicsEndImageContext();
  return tintedImage;
}

@end

如上所示,请通过<编码>等内容。 with White:0.0 alpha:0.3] as the tintColor paraile (experiment with the alpha Value).

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