Assign xib to the UIView in Swift

for Swift 4

extension UIView {    class func loadFromNibNamed(nibNamed: String, bundle: Bundle? = nil) -> UIView? {      return UINib(          nibName: nibNamed,          bundle: bundle      ).instantiate(withOwner: nil, options: nil)[0] as? UIView  }}

for Swift 3

You could create an extension on UIView:

extension UIView {    class func loadFromNibNamed(nibNamed: String, bundle: NSBundle? = nil) -> UIView? {        return UINib(            nibName: nibNamed,            bundle: bundle        ).instantiateWithOwner(nil, options: nil)[0] as? UIView    }}

Note: Using UINib is faster because it does caching for you.

Then you can just do:

ViewDetailItem.loadFromNibNamed("ViewBtnWishList")

And you will be able to reuse that method on any view.

This worked for me.

override func awakeAfterUsingCoder(aDecoder: NSCoder) -> AnyObject? {    if self.subviews.count == 0 {        return loadNib()    }    return self}private func loadNib() -> YourCustomView {    return NSBundle.mainBundle().loadNibNamed("YourCustomViewNibName", owner: nil, options: nil)[0] as YourCustomView}

Tested in Xcode 7 beta 4 , Swift 2.0 . The following code will assign xib to the UIView.You can use this custom xib view in storyboard and access the IBOutlet object also.

import UIKit@IBDesignable class SimpleCustomView:UIView{    var view:UIView!;    @IBOutlet weak var lblTitle: UILabel!   @IBInspectable var lblTitleText : String?        {        get{            return lblTitle.text;        }        set(lblTitleText)        {            lblTitle.text = lblTitleText!;        }    }    override init(frame: CGRect) {        super.init(frame: frame)        loadViewFromNib ()    }    required init?(coder aDecoder: NSCoder) {        super.init(coder: aDecoder)        loadViewFromNib ()    }    func loadViewFromNib() {        let bundle = NSBundle(forClass: self.dynamicType)        let nib = UINib(nibName: "SimpleCustomView", bundle: bundle)        let view = nib.instantiateWithOwner(self, options: nil)[0] as! UIView        view.frame = bounds        view.autoresizingMask = [.FlexibleWidth, .FlexibleHeight]        self.addSubview(view);    }}

Access customview programatically

self.customView =  SimpleCustomView(frame: CGRectMake(100, 100, 200, 200))        self.view.addSubview(self.customView!);

Source code - https://github.com/karthikprabhuA/CustomXIBSwift