1
我试图通过设置约束来垂直对齐logoImage
水平&但在测试时显示在(x:0, y:0)
上。 任何想法如何解决这个问题? 感谢尝试以编程方式实现约束时忽略约束条件
var movieView : UIView?
let logoImage = UIImageView(image: #imageLiteral(resourceName: "my_logo"))
// This function runs in viewWillAppear
internal func setupIntroMovie() {
movieView = UIView(frame: view.frame)
view.addSubview(movieView!)
view.addSubview(logoImage)
let horizontalConstraint = NSLayoutConstraint(item: logoImage,
attribute: .centerX,
relatedBy: .equal,
toItem: view,
attribute: .centerX,
multiplier: 1,
constant: 0)
let verticalConstraint = NSLayoutConstraint(item: logoImage,
attribute: .centerY,
relatedBy: .equal,
toItem: view,
attribute: .centerY,
multiplier: 1,
constant: 0)
view.addConstraints([horizontalConstraint,
verticalConstraint])
updateViewConstraints()
}
术语“错误”太含糊。在哪一行,什么是完整的错误? –
什么是不行的?它是不是像你期望的那样出现在屏幕上?应用程序崩溃了吗?日志中是否有警告? –
@ Mr.Xcoder对不起,我忘了解决题目。它不会给我任何错误 – Slowpoke