ios 绘制圆角图片的另一种方式

#pragma mark - 绘制圆角图片

- (UIImage*)imageAddCornerWithRadius:(CGFloat)radius andSize:(CGSize)size andImage:(UIImage *)image{
    
    CGRect rect = CGRectMake(0, 0, size.width, size.height); UIGraphicsBeginImageContextWithOptions(size, NO, [UIScreen mainScreen].scale);
    CGContextRef ctx = UIGraphicsGetCurrentContext();
    UIBezierPath * path = [UIBezierPath bezierPathWithRoundedRect:rect byRoundingCorners:UIRectCornerAllCorners cornerRadii:CGSizeMake(radius, radius)];
    CGContextAddPath(ctx,path.CGPath);
    CGContextClip(ctx);
    [image drawInRect:rect];
    CGContextDrawPath(ctx, kCGPathFillStroke);
    UIImage * newImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return newImage;
    
}