Objective-C方法与可选的需求方法Swift冲突 [英] Objective-C method conflicts with optional requirement method Swift
问题描述
Xcode更新后，编译器开始在工作代码上抛出错误（两个函数都在AppDelegate.swift中）。
After the Xcode update, the compiler began to throw an error on the working code (both functions are in the AppDelegate.swift).
func application(application: UIApplication,
didFinishLaunchingWithOptions launchOptions: NSDictionary?) -> Bool
{
FBLoginView.self
FBProfilePictureView.self
return true
}
错误：
/ Users /../ AppDelegate.swift:14:11：Objective -C方法'application：didFinishLaunchingWithOptions：'由方法'application（：didFinishLaunchingWithOptions :)提供'与协议'UIApplicationDelegate'中的可选需求方法'application（：didFinishLaunchingWithOptions :)'冲突
/Users/../AppDelegate.swift:14:11: Objective-C method 'application:didFinishLaunchingWithOptions:' provided by method 'application(:didFinishLaunchingWithOptions:)' conflicts with optional requirement method 'application(:didFinishLaunchingWithOptions:)' in protocol 'UIApplicationDelegate'
第二个
func application(application: UIApplication,
openURL url: NSURL,
sourceApplication: NSString?,
annotation: AnyObject) -> Bool {
var wasHandled:Bool = FBAppCall.handleOpenURL(url, sourceApplication: sourceApplication as! String)
return wasHandled
}
有错误
/ Users /../ AppDelegate.swift:25： 11：Objective-C方法
'应用程序：openURL：sourceApplication：annotation：'由方法提供'应用程序（：openURL：sourceApplication：annotation :)'与可选的需求方法'应用程序冲突（ ：openURL：sourceApplication：annotation :)'in protocol'UIApplicationDelegate'
/Users/../AppDelegate.swift:25:11: Objective-C method 'application:openURL:sourceApplication:annotation:' provided by method 'application(:openURL:sourceApplication:annotation:)' conflicts with optional requirement method 'application(:openURL:sourceApplication:annotation:)' in protocol 'UIApplicationDelegate'
我明白我很可能希望你能以某种方式粘在一起这两个功能合而为一。我不明白为什么这个代码在6.3中突然停止工作，尽管它在6.2中工作。
I understand that most likely I should like you to stick together somehow these two functions into one. I do not understand why this code suddenly stopped working in 6.3, despite the fact that it worked in 6.2.
推荐答案
我是不确定为什么编译器会抛出错误，但我确实看到这些相同方法的默认Swift版本有所不同。也许你可以用普通的Swift项目替换函数声明：
I'm not sure exactly why the compiler is throwing the error, however I do see a difference in the default Swift version of those same methods. Perhaps you could replace the function declaration with those created with a normal Swift project:
func application（application：UIApplication，didFinishLaunchingWithOptions launchOptions：[NSObject：AnyObject]？） - > Bool
func application（application： UIApplication，openURL url：NSURL，sourceApplication：String？，annotation：AnyObject） - > Bool
我建议用上面的方法替换你的方法声明，看它现在是否编译。
I'd recommend replacing your method declarations with the above to see if it compiles now.
编辑1（2015年9月21日）：我已经确认这些是Xcode 7公开发布的最新版本。他们删除了可选（注释：AnyObject？）并在声明＃2中创建了它（注释：AnyObject ）。
EDIT 1 (9/21/2015): I've confirmed these are now up to date for Xcode 7's public release. They removed the optional (annotation: AnyObject?) and made it (annotation: AnyObject), in declaration #2.
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