swift语言：AnyObject与AnyObject!的含义与区别是什么？

阳光天使_于勇 2014-09-11 03:15:24

最近在学习swift语言，发现有的地方用AnyObject，有的地方用AnyObject！，请问AnyObject与AnyObject!的含义与区别是什么呢？谢谢！！！

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Bannings 2014-09-12

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AnyObject是一定不能为空，包括初始化的时候 AnyObject！表示类型是一个optional类型，初始化的时候可以为空，但是加！表示知道用它时它是一定不为空的我写过一篇： http://blog.csdn.net/zhangao0086/article/details/38640209

lionfresh 2014-09-11

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AnyObject指对象可以为空，AnyObject!表示对象不允许为空，我的理解是类型C语言中的断言。

swift 代码，换肤。使用简单 class SelectThemeViewController: UIViewController { override func viewDidLoad() { super.viewDidLoad() view.theme_backgroundColor = GlobalPicker.backgroundColor } @IBAction @objc(tapRed:) func tapRed(_ sender: AnyObject) { MyThemes.switchTo(theme: .red) } @IBAction @objc func tapYellow(_ sender: AnyObject) { MyThemes.switchTo(theme: .yello) } @IBAction func tapBlue(_ sender: AnyObject) { MyThemes.switchTo(theme: .blue) } }

虽然使用swift开发了一段时间，但是感觉对一些基础的东西了解不是比较透彻，在查询了许多资料以后还是打算自己动手记录一下，下面这篇文章主要给大家介绍了关于swift中AnyObject和Any的介绍与区别的相关资料，需要的朋友可以参考下。

SlideMenuControllerSwift ======================== [![Platform](http://img.shields.io/badge/platform-ios-blue.svg?style=flat )](https://developer.apple.com/iphone/index.action) [![Language](http://img.shields.io/badge/language-swift-brightgreen.svg?style=flat )](https://developer.apple.com/swift) [![License](http://img.shields.io/badge/license-MIT-lightgrey.svg?style=flat )](http://mit-license.org) [![Issues](https://img.shields.io/github/issues/dekatotoro/SlideMenuControllerSwift.svg?style=flat )](https://github.com/dekatotoro/SlideMenuControllerSwift/issues?state=open) iOS Slide View based on iQON, Feedly, Google+, Ameba iPhone app. ![sample](Screenshots/SlideMenuControllerSwift.gif) ##Installation ####CocoaPods comming soon... ####Manually Add the `SlideMenuController.swift` file to your project. ##Usage ###Setup In your app delegate: ```swift func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool { // create viewController code... let slideMenuController = SlideMenuController(mainViewController: mainViewController, leftMenuViewController: leftViewController, rightMenuViewController: rightViewController) self.window?.rootViewController = slideMenuController self.window?.makeKeyAndVisible() return true } ``` If you want to use the custom option, please change the SlideMenuOption class. ```swift class SlideMenuOption { let leftViewWidth: CGFloat = 270.0 let leftBezelWidth: CGFloat = 16.0 let contentViewScale: CGFloat = 0.96 let contentViewOpacity: CGFloat = 0.5 let shadowOpacity: CGFloat = 0.0 let shadowRadius: CGFloat = 0.0 let shadowOffset: CGSize = CGSizeMake(0,0) let panFromBezel: Bool = true let animationDuration: CGFloat = 0.4 let rightViewWidth: CGFloat = 270.0 let rightBezelWidth: CGFloat = 16.0 let rightPanFromBezel: Bool = true let hideStatusBar: Bool = true let pointOfNoReturnWidth: CGFloat = 44.0 init() { } } ``` ###You can access from UIViewController ```swift self.slideMenuController()? ``` or ```swift if let slideMenuController = self.slideMenuController() { // some code } ``` ### add navigationBarButton ```swift viewController.addLeftBarButtonWithImage(UIImage(named: "hoge")!) viewController.addRightBarButtonWithImage(UIImage(named: "fuga")!) ``` ### open and close ```swift // Open self.slideMenuController()?.openLeft() self.slideMenuController()?.openRight() // close self.slideMenuController()?.closeLeft() self.slideMenuController()?.closeRight() ``` ## Requirements Requires iOS 7.0 and ARC. ## Features - Highly customizable - Complete example ## Contributing Forks, patches and other feedback are welcome. ## Creator [Yuji Hato](https://github.com/dekatotoro) [Blog](http://buzzmemo.blogspot.jp/) ## License SlideMenuControllerSwift is available under the MIT license. See the LICENSE file for more info.

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