如何将背景图像添加到UITextView

Question

我正在尝试将背景图像添加到我的UITextView中,但似乎没有这样做的选项.我尝试添加一个imageView与图像作为子视图

self.bioTextView.delegate = self
let imgView = UIImageView(frame: self.bioTextView.frame)
imgView.image = #imageLiteral(resourceName: "text_field_bio")
self.bioTextView.addSubview(imgView)

但这也不起作用.textView背景的颜色很清晰.我也尝试过将imgView发送到后面,但这也不起作用.

Answer 1

添加foll_wing两行并检查一次

bioTextView.addSubview(imgView)
bioTextView.sendSubview(toBack: imgView)

或使用

bioTextView.backgroundColor = UIColor(patternImage: UIImage(named: "Image.png"))

更新

let textView = UITextView(frame: CGRect(x: CGFloat(20), y: CGFloat(20), width: CGFloat(400), height: CGFloat(400 )))
    textView.text = "this is a test \n this is test \n this is a test"
    let img = UIImageView(frame: textView.bounds)
    img.image = UIImage(named: "1.jpg")
    textView.backgroundColor = UIColor.clear
    textView.addSubview( img)
    self.view.addSubview(textView)
    textView.sendSubview(toBack: img)

你得到了输出