ios7 – 如何在不使用蒙版的情况下创建带圆角的SKTexture

我希望用一个用户的facebook个人资料图片创建一个简单的节点,其中图片有圆角(或完整的圆圈).我按如下方式创建节点：

SKNode *friend = [[SKNode alloc] init];

SKTexture *texture = [SKTexture textureWithImage:user[@"fbProfilePicture"]];                
SKSpriteNode *profilePic = [SKSpriteNode spriteNodeWithTexture:texture];

[friend addChild:profilePic];

除了使用SKCropNode(这似乎是一个糟糕的解决方法)之外,我找不到任何适当的文档来创建带圆角的图像

解决方法

试试这个：

// your profile picture
UIImage *fbProfilePicture = [UIImage imageNamed:@"fbProfilePicture"];

// create the image with rounded corners
UIGraphicsBeginImageContextWithOptions(fbProfilePicture.size,NO,0);
CGRect rect = CGRectMake(0,fbProfilePicture.size.width,fbProfilePicture.size.height);
[[UIBezierPath bezierPathWithRoundedRect:rect cornerRadius:20.0] addClip];
[fbProfilePicture drawInRect:rect];
UIImage *roundedImage = UIGraphicsGetimageFromCurrentimageContext();
UIGraphicsEndImageContext();

// use the roundedImage as texture for your sprite    
SKTexture *texture = [SKTexture textureWithImage:roundedImage];  
SKSpriteNode *profilePic = [SKSpriteNode spriteNodeWithTexture:texture size:CGSizeMake(fbProfilePicture.size.width,fbProfilePicture.size.height)];

[self addChild:profilePic];

圆角部分来自this answer.