当UIImageView的内容模式为.scaleAspectFill时，为什么画像中的UIImageView超出了它的约束？

Question

我正在使用ImageView和CollectionView创建一个图像库。一切正常，但人像模式的图片超出了限制。为什么会这样？

    myPicture = UIImageView(image: myArray[0])
    view.addSubview(myPicture)
    myPicture.translatesAutoresizingMaskIntoConstraints = false
    myPicture.contentMode = .scaleAspectFill
    myPicture.topAnchor.constraint(equalTo: tabBar.bottomAnchor, constant: view.bounds.height / 80).isActive = true
    myPicture.leftAnchor.constraint(equalTo: view.leftAnchor, constant: 0).isActive = true
    myPicture.rightAnchor.constraint(equalTo: view.rightAnchor, constant: 0).isActive = true
    myPicture.bottomAnchor.constraint(equalTo: collectionView.topAnchor, constant:  0).isActive = true

Answer 1

您需要设置

myPicture.clipsToBounds = true