objective-c - 如何在iOS中将图像裁剪成多边形？

Question

我想将 UIImageview 上的图像裁剪成任何形状

Answer 1

您设置了剪切路径，瞧:

// Load image thumbnail
    NSString *imageName = [self.picArray objectAtIndex:indexPath.row];
    UIImage *image = [UIImage imageNamed:imageName];        
    CGSize imageSize = image.size;
    CGRect imageRect = CGRectMake(0, 0, imageSize.width, imageSize.height);    

    UIGraphicsBeginImageContextWithOptions(imageSize, NO, 0.0);
    // Create the clipping path and add it
    UIBezierPath *path = [UIBezierPath bezierPathWithRoundedRect:imageRect cornerRadius:5.0f];
    [path addClip];
    [image drawInRect:imageRect];
    UIImage *roundedImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();

此代码加载图像并通过圆角矩形创建路径，结果是最终图像被裁剪，即圆角。 RoundedImage 就是结果。