ios9中 UIStackView的使用
by 伍雪颖


UIStackView能够垂直或水平排布多个subview,
自己主动为每一个subview创建和加入Auto Layout constraints.

1.加入subview
let logoImage:UIImageView = UIImageView(image: UIImage(named: "logo"))
logoImage.
contentMode = .ScaleAspectFit
self.stackView.addArrangedSubview(logoImage)
UIView.animateWithDuration(0.25, animations: {
   
self.stackView.layoutIfNeeded()
})

2.删除subview
self.stackView.removeArrangedSubview(logoView)