在 Swift 中更改 UISearchBar/键盘搜索按钮标题

问题描述

我正在尝试做相当于这个 但在 Swift 中，我遇到了问题:

I'm trying to do the equivalent of this but in Swift and I'm running into problems:

1. 在 swift 中没有等效的 try/catch 块
2. if 语句似乎永远不会被评估为真

1. No equivalent of try/catch blocks in swift
2. The if statement never seems to be evaluated as true

以下是我目前整理的内容:

Here is what I've put together so far:

for searchBarSubview in self.searchBar!.subviews {
    if (searchBarSubview.conformsToProtocol(UITextInputTraits)) {
        var searchBarTextField = searchBarSubview as UITextField
        searchBarTextField.returnKeyType = UIReturnKeyType.Done
    }
}

有人知道我哪里出错了吗?

Does anyone have any ideas where I'm going wrong?

推荐答案

我认为你只需要执行以下代码就可以了.有什么理由让您觉得检查 UITextInputTraits 吗?

I think you only need to do the following code and you are good to go. Any reasons why that bothers you to check UITextInputTraits?

[self.searchBar setReturnKeyType:UIReturnKeyDone];

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