無法將類型'[AnyObject]'的值轉換爲期望的參數類型'[UIUserNotificationAction]？'

Question

var category:UIMutableUserNotificationCategory=UIMutableUserNotificationCategory() 
category.identifier="DEFAULT_GATEGORY" 
let defaultAction:NSArray=[action] 
category.setActions(defaultAction as [AnyObject] as [AnyObject], forContext: UIUserNotificationActionContext.Minimal) 

Answer 1

假設action是UIUserNotificationAction類型：

var category = UIMutableUserNotificationCategory() // NOTE: type not needed. 
category.identifier = "DEFAULT_GATEGORY" 
let defaultAction = [action] // NOTE: Type not needed. 
category.setActions(defaultAction, forContext: UIUserNotificationActionContext.Minimal) 

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正如你看到的，我所做的就是刪除不需要的（和誤導）類型的信息。我發現依靠Swift的自動類型確定系統是有幫助的。

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測試了以下游樂場代碼：

let action = UIMutableUserNotificationAction() 
var category = UIMutableUserNotificationCategory() 
category.identifier = "DEFAULT_GATEGORY" 
let defaultAction = [action] 
category.setActions(defaultAction, forContext: UIUserNotificationActionContext.Minimal)