Swift下使用Xib設計介面

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雖然Swift可以純程式碼設計介面，不過不利用先用的視覺化檢視有時候有點效率低。下面是使用xib設計方法，部分代碼來自網上。

（1）建立View

 

 

 

2、建立View class

 

3、DemoView.swift中

class DemoView: UIView {

// MARK:- 建立視圖
class func newInstance() -> DemoView? {
let nibView = Bundle.main.loadNibNamed("DemoView", owner: nil, options: nil);

if let view = nibView?.first as? DemoView {
return view
}
return nil
}

 4、ViewController中

class LoginViewController: UIViewController {

override func viewDidLoad() {
super.viewDidLoad()
var myView = Bundle.main.loadNibNamed("DemoView", owner: nil, options: nil)?.first as? DemoView

myView?.frame = CGRect(x: 0, y: 0, width: self.view.frame.width-50, height: self.view.frame.height-140)
myView?.center = self.view.center

if myView != nil {
self.view.addSubview(myView!)
}
}

5、調用ViewController

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {

var window: UIWindow?

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
// Override point for customization after application launch.
window=UIWindow(frame: UIScreen.main.bounds)
window?.backgroundColor=UIColor.white
window?.makeKeyAndVisible()
window?.rootViewController=LoginViewController();
//window?.rootViewController=MainViewController()
return true
}

6、注意xib要設定

7、添加幾個控制項效果

8、點擊兩個圓環形狀

9、Button上右鍵連線代碼

 

 10、運行點擊按鈕看到控制台顯示adfa.

 

Swift下使用Xib設計介面