UITableView中图像的圆角矩形/圆角

Question

我使用这个类别并为我的UITableView创建的图像大小相同.有没有办法让图像也有圆角？谢谢!

+ (UIImage *)scale:(UIImage *)image toSize:(CGSize)size
{
    UIGraphicsBeginImageContext(size);
    [image drawInRect:CGRectMake(0, 0, size.width, size.height)];
    UIImage *scaledImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return scaledImage;
}

编辑:然后我获取图像和其他对象信息,将其放入NSDictionary中以进入UITableView.我尝试在cellForRowAtIndexPath中更改UIImageView.layer属性,但它似乎没有做到这一点:

cell.TitleLabel.text = [dict objectForKey:@"Name"];
cell.CardImage.image = [dict objectForKey:@"Image"];
cell.CardImage.layer.cornerRadius = 5.0;

Answer 1

您可以为绘图操作添加剪裁,UIBezierPath该类使这非常容易.

将代码扩展为:

+ (UIImage *)scale:(UIImage *)image toSize:(CGSize)size
{
    UIGraphicsBeginImageContext(size);
    CGRect rect = CGRectMake(0, 0, size.width, size.height);
    [[UIBezierPath bezierPathWithRoundeRect:rect cornerRadius:5] addClip];
    [image drawInRect:rect];
    UIImage *scaledImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return scaledImage;
}