如何在Swift的tableview单元格中添加自定义imageview？

Question

我需要做的是在uitableview上添加圆形图像到单元格.我可以这样做吗？

我尝试了一些代码,但我根本不工作,这是我的代码:

let imageName = "person.png"
    let image = UIImage(named: imageName)
    var imageView = UIImageView(image: image!)

    imageView = UIImageView(frame: CGRectMake(0, 0, 100, 100))
    imageView.layer.borderWidth=1.0
    imageView.layer.masksToBounds = false
    imageView.layer.borderColor = UIColor.whiteColor().CGColor
    imageView.layer.cornerRadius = 13;
    imageView.clipsToBounds = true

    cell.imageView!.image = imageView

我收到了这个错误:

不能将'UIImageView'类型的值赋给'UIImage'类型的值？

Answer 1

你不能这样分配Image.但你可以这样做.

首先添加将调整Image大小的函数:

func resizeImage(image:UIImage, toTheSize size:CGSize)->UIImage{


    var scale = CGFloat(max(size.width/image.size.width,
        size.height/image.size.height))
    var width:CGFloat  = image.size.width * scale
    var height:CGFloat = image.size.height * scale;

    var rr:CGRect = CGRectMake( 0, 0, width, height);

    UIGraphicsBeginImageContextWithOptions(size, false, 0);
    image.drawInRect(rr)
    let newImage = UIGraphicsGetImageFromCurrentImageContext()
    UIGraphicsEndImageContext();
    return newImage
}

之后你可以分配图像:

let imageName = "11749-simple.jpg"
let image = UIImage(named: imageName)
let newImage = resizeImage(image!, toTheSize: CGSizeMake(70, 70))
var cellImageLayer: CALayer?  = cell.cellImage.layer
cellImageLayer!.cornerRadius = cellImageLayer!.frame.size.width / 2
cellImageLayer!.masksToBounds = true
cell.cellImage.image = newImage

结果将是:

或者你可以尝试这个扩展:

extension UIImage {
var circleMask: UIImage {
    let square = size.width < size.height ? CGSize(width: size.width, height: size.width) : CGSize(width: size.height, height: size.height)
    let imageView = UIImageView(frame: CGRect(origin: CGPoint(x: 0, y: 0), size: square))
    imageView.contentMode = UIViewContentMode.ScaleAspectFill
    imageView.image = self
    imageView.layer.cornerRadius = square.width/2
    imageView.layer.borderColor = UIColor.whiteColor().CGColor
    imageView.layer.borderWidth = 5
    imageView.layer.masksToBounds = true
    UIGraphicsBeginImageContext(imageView.bounds.size)
    imageView.layer.renderInContext(UIGraphicsGetCurrentContext())
    let result = UIGraphicsGetImageFromCurrentImageContext()
    UIGraphicsEndImageContext()
    return result
    }
}

你可以分配图像:

let imageName = "11749-simple.jpg"
let image = UIImage(named: imageName)
cell.cellImage.image = image?.circleMask

延伸信用到这个答案.