iOS中的圆角
2016-04-13 本文已影响146人
少少白
UIImageView的圆角:
- 产生离屏渲染的maskToBounds
cell.imageOne.layer.cornerRadius = 30.0;
cell.imageOne.layer.masksToBounds = YES;
- 添加maskView
CALayer *maskLayer = [[CALayer alloc] init];
maskLayer.frame = CGRectMake(0, 0, 60, 60);
maskLayer.contents = (__bridge id _Nullable)([UIImage imageNamed:@"appIcon_placeholder"].CGImage);
cell.imageOne.layer.mask = maskLayer; // iOS 7
cell.imageTwo.maskView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"appIcon_placeholder"]]; // iOS 8
cell.imageThree.maskView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"appIcon_placeholder"]];
- 生成一张圆角图片
- (UIImage *)cornerWithImage:(UIImage *)image cornerRadius:(CGFloat)cornerRadius andSize:(CGSize)size
{
CGRect rect = CGRectMake(0, 0, size.width, size.height);
UIGraphicsBeginImageContextWithOptions(size, NO, [UIScreen mainScreen].scale);
CGContextRef contextRef = UIGraphicsGetCurrentContext();
UIBezierPath *bezierPath = [UIBezierPath bezierPathWithRoundedRect:rect byRoundingCorners:UIRectCornerAllCorners cornerRadii:CGSizeMake(cornerRadius, cornerRadius)];
CGContextAddPath(contextRef, bezierPath.CGPath);
CGContextClip(contextRef);
[image drawInRect:rect];
CGContextDrawPath(contextRef, kCGPathFillStroke);
UIImage *resultImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return resultImage;
}
Demo地址MyCornerRadius
参考:
