Objective-C method ‘application:didFinishLaunchingWithOptions:

最新推荐文章于 2025-07-14 14:44:39 发布

转载最新推荐文章于 2025-07-14 14:44:39 发布 · 962 阅读

本文介绍了一种在Swift中遇到的应用启动方法签名不匹配导致的编译错误，并给出了修改后的正确方法签名。

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下载了一个swift的代码例子，但编译时在
func application(application: UIApplication,
didFinishLaunchingWithOptions launchOptions: NSDictionary?) -> Bool {
}
出现错误：
Objective-C method ‘application:didFinishLaunchingWithOptions:’ provided by method ‘application(:didFinishLaunchingWithOptions:)’ conflicts with optional requirement method ‘application(:didFinishLaunchingWithOptions:)’ in protocol ‘UIApplicationDelegate’

经查找，将函数改为
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject:AnyObject]?) -> Bool
就好了。