如何在超级视图的底部附加XIB文件
我有一个名为“ xibFIleView”的XIB文件
我用于调用XIB View的代码是:-
override func viewDidLoad() {
super.viewDidLoad()
self.view.addSubview(instanceFromNib())
}
func instanceFromNib() -> xibFIleView {
return UINib(nibName: "xibFileView", bundle: nil).instantiate(withOwner: nil, options: nil)[0] as! xibFIleView
}
}
我们如何在超级视图的底部附加XIB视图。
答案 0 :(得分:1)
您可以通过将constraints
设置为frame
或xibView
来实现。
设置约束:
override func viewDidLoad() {
super.viewDidLoad()
let xibView = instanceFromNib()
self.view.addSubview(xibView)
xibView.translatesAutoresizingMaskIntoConstraints = false
let constraint_leading = NSLayoutConstraint(item: xibView, attribute: .leading, relatedBy: .equal, toItem: self.view, attribute: .leading, multiplier: 1, constant: 0)
let constraint_bottom = NSLayoutConstraint(item: xibView, attribute: .bottom, relatedBy: .equal, toItem: self.view, attribute: .bottom, multiplier: 1, constant: 0)
let constraint_height = NSLayoutConstraint(item: xibView, attribute: .height, relatedBy: .equal, toItem: nil, attribute: .height, multiplier: 1, constant: xibView.frame.height)
let constraint_width = NSLayoutConstraint(item: xibView, attribute: .width, relatedBy: .equal, toItem: nil, attribute: .width, multiplier: 1, constant: xibView.frame.width)
self.view.addConstraint(constraint_leading)
self.view.addConstraint(constraint_bottom)
xibView.addConstraint(constraint_height)
xibView.addConstraint(constraint_width)
}
-----或-----
设置框架:
在您的viewDidLoad()
中进行以下更改:
override func viewDidLoad() {
super.viewDidLoad()
let xibView = instanceFromNib()
let y_pos = self.view.frame.height - xibView.frame.height
xibView.frame = CGRect(x: 0, y: y_pos, width: xibView.frame.width, height: xibView.frame.height)
// change x, y, width, height based on your requirement.
self.view.addSubview(xibView)
}
注意:根据您的要求更改x,y的位置和宽度,高度。
答案 1 :(得分:0)
使用自动布局添加4个约束,足以指定子视图的宽度,高度,x和y位置。例如:
override func viewDidLoad() {
super.viewDidLoad()
let child = instanceFromNib()
self.view.addSubview(child)
NSLayoutConstraint.activate([
child.bottomAnchor.constraint(equalTo: view.bottomAnchor),
child.leadingAnchor.constraint(equalTo: view.leadingAnchor),
child.trailingAnchor.constraint(equalTo: view.trailingAnchor),
child.heightAnchor.constraint(equalToConstant: 300) // <- Your desired view height here
)]
}
func instanceFromNib() -> xibFIleView {
return UINib(nibName: "xibFileView", bundle: nil).instantiate(withOwner: nil, options: nil)[0] as! xibFIleView
}