iphone - UITableView 中图像的圆角矩形/圆角

Question

我使用此类别并为我的 UITableView 创建大小相同的图像。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 以进入 UITableView。我尝试更改 cellForRowAtIndexPath 中的 UIImageView.layer 属性，但似乎没有成功:

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

Answer 1

您可以在绘图操作中添加裁剪，UIBezierPath 类使这变得 super 简单。

将您的代码扩展到:

+ (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;
}