iphone - 如何在 CGContext 中用另一个图像剪辑图像？

Question

我想用两张图片得到以下结果。

请帮我。

Answer 1

在@Sumanth 的合并两个图像的代码之后，您需要屏蔽最终图像，例如how-to-mask-an-image链接

Answer 2

要在图像视图上组合两个图像，试试这个

UIImage *bottomImage = [UIImage imageNamed:@"bottom.png"]; //background image
UIImage *image       = [UIImage imageNamed:@"top.png"]; //foreground image
CGSize newSize = CGSizeMake(width, height);
UIGraphicsBeginImageContext( newSize );
// Use existing opacity as is
[bottomImage drawInRect:CGRectMake(0,0,newSize.width,newSize.height)];
// Apply supplied opacity if applicable
[image drawInRect:CGRectMake(0,0,newSize.width,newSize.height) blendMode:kCGBlendModeNormal alpha:0.8];
UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();

添加newImage到 UIImageView