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[英]Loading a custom UIView from a XIB file within a XIB for a ViewController view
[英]Loading iOS view dynamically from xib file
我一直在寻找一个简单的示例,该示例关于如何重用情节提要中的xib文件中的视图,但是我发现所有内容已经过时或无法解决我的问题,情况是我很简单:
谢谢
我已经实现了UIView的扩展:
extension UIView {
static func createInstance<T: UIView>(ofType type: T.Type) -> T {
let className = NSStringFromClass(type).components(separatedBy: ".").last
return Bundle.main.loadNibNamed(className!, owner: self, options: nil)![0] as! T
}
}
这样,无论您在何处以这种方式加载自定义视图:
func override viewDidLoad() {
super.viewDidLoad()
let customView = UIView.createInstance(ofType: CustomView.self)
self.view.addSubview(customView)
}
在您的自定义视图类中添加以下代码
class MyCustomView: UIView {
@IBOutlet var contentView: UIView! // take view outlet
override init(frame: CGRect) {
super.init(frame: frame)
xibSetup()
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
xibSetup()
}
func xibSetup() {
contentView = loadViewFromNib()
// use bounds not frame or it'll be offset
contentView!.frame = bounds
//Make the view stretch with containing view
contentView!.autoresizingMask = [UIViewAutoresizing.flexibleWidth, UIViewAutoresizing.flexibleHeight]
// Adding custom subview on top of our view (over any custom drawing > see note below)
addSubview(contentView!)
layoutIfNeeded()
}
override func layoutIfNeeded() {
super.layoutIfNeeded()
print("layoutIfNeeded")
}
func loadViewFromNib() -> UIView! {
let bundle = Bundle(for: type(of: self))
let nib = UINib(nibName: String(describing: type(of: self)), bundle: bundle)
let view = nib.instantiate(withOwner: self, options: nil)[0] as! UIView
return view
}
}
将此类作为情节提要中的超类视图添加。
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