Swift3 展开可选-Apple Watch文本输入
我想接收一些用户在Apple Watch上输入的文本。这就是我到目前为止所做的:Swift3 展开可选-Apple Watch文本输入,swift3,watchkit,optional,Swift3,Watchkit,Optional,我想接收一些用户在Apple Watch上输入的文本。这就是我到目前为止所做的: presentTextInputController(withSuggestions: ["Michael","David","John","Lisa","Mary","Susan","Matthew","James","Jessica","Jennifer","Amanda","Emily","Dylan","Ross","Rupert"], allowedInputMode: WKTextInputMode
presentTextInputController(withSuggestions: ["Michael","David","John","Lisa","Mary","Susan","Matthew","James","Jessica","Jennifer","Amanda","Emily","Dylan","Ross","Rupert"], allowedInputMode: WKTextInputMode.plain) { (arr: [Any]?) in
playerNames.playerOne = String(describing: arr)
print(playerNames.playerOne)
}
这总是返回一个可选的,比如optional([Michael])
我希望它返回Michael
我已经找遍了optionals,但似乎找不到anwser。您可以尝试以下代码:
let suggestions = ["Michael", "David", "John", "Lisa", "Mary", "Susan", "Matthew", "James", "Jessica", "Jennifer", "Amanda", "Emily", "Dylan", "Ross", "Rupert"]
presentTextInputController(withSuggestions: suggestions, allowedInputMode: WKTextInputMode.plain) { (arr: [Any]?) in
guard let arr = arr, let firstElement = arr.first as? String else { return }
playerNames.playerOne = firstElement
print(playerNames.playerOne)
}
以下是一些您可以参考的文档:,。您希望它返回
“Michael”
还是[“Michael”]
?只返回“Michael”。第一个问题是,如何将arr作为字符串返回?它工作得非常好,但返回-[Michael]。我怎么能只返回Michael呢?我刚刚编辑了我的答案,但只有arr
始终返回一个元素,它才能正常工作。我需要您提供更多有关arr
的上下文。例如:arr
=[“Michael”]
,它可以正常工作。但是如果arr
=[“James”,“Michael”]
,那么它将返回“James”
,因为它将始终使用第一个元素。我假设arr
总是有一个元素。是的,不客气!如果你需要帮助,请留言,我会回来的。