为什么 UIImageView 在其内容模式为 .scaleAspectFill 时在纵向图片中超出其限制？

Question

我正在使用 ImageView 和 CollectionView 创建图片库。一切正常，但肖像模式图片超出了限制。这是为什么？

    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

为什么 UIImageView 在其内容模式为 .scaleAspectFill 时在纵向图片中超出其限制？

Why UIImageView when its content mode is .scaleAspectFill in portrait pictures goes over its constraints?

ios

swift

uiimageview

autolayout

contentmode