可点击的子字符串在SwiftUI中

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英文:

Tappable Substrings In SwiftUI

问题

我在我的应用中有帖子,用户可以在帖子中标记其他用户,期望是这些标记可以被点击并在点击时触发一个函数。

举个例子,帖子:"hello @someUser and @otherUser",@someUser 和 @otherUser 应该可以被点击。

这是我尝试过的代码,但它只显示带有标记用户的文本,从上面的例子中只显示:"@someUser @otherUser",而不显示其他文本。点击实现确实有效,但没有显示其他文本,我觉得在这里使用 HStack 不是理想的。

在 SwiftUI 中有更好的处理方式吗?

英文:

I have posts on my app where users can tag other users, the expectation is that these tags should be tappable and trigger a function when tapped.

For example the post: "hello @someUser and @otherUser" the @someUser and @otherUser should be tappable.

This is the code I've tried, but it's only showing text with tagged users, from the example above it is only displaying: "@someUser @otherUser" without the rest of the text. The tapping implementation does work but no other text is displayed, and I don't think an HStack is ideal here

Is there a better way to handle this in SwiftUI?

@ViewBuilder
    func bodyTextView(text: String) -> some View {
        HStack {
            ForEach(attributedText(text: text), id: \.self) { text in
                if text.hasPrefix("@") {
                    Text(text)
                        .onTapGesture {
                            print("TAP: \(text)")
                        }
                } else {
                    Text(text)
                }
            }
        }
        
    }
    
    func attributedText(text: String) -> [String] {
        let inputString = text
        let regexPattern = "@\\w+"

        guard let regex = try? NSRegularExpression(pattern: regexPattern) else {
            return [inputString]
        }
        let range = NSRange(inputString.startIndex..<inputString.endIndex, in: inputString)
        let matches = regex.matches(in: inputString, range: range)
            
        var substrings: [String] = []
            
        for match in matches {
            if let swiftRange = Range(match.range, in: inputString) {
                let substring = String(inputString[swiftRange])
                substrings.append(substring)
            }
        }
            
        return substrings
    }

答案1

得分: 1

以下是翻译好的部分:

你可以使用URLScheme创建一个URL,例如yourApp://users/username,然后使用Markdown + LocalizedStringKey和/或AttributedText,你的字符串应该类似于"[@sample](yourApp://users/sample)",然后你可以使用以下方式处理点击事件:

@Environment(\.openURL) private var openURL

这进一步详细说明了一些内容。你可以使用以下方式替换当前的函数:

extension String {
    /// 用`"@\\w+"`替换为`"[@\(username)](yourApp://users/\(username))"`
    func addAppURLToUser() -> String {
        var inputString = self
        let regexPattern = "@\\w+"

        guard let regex = try? NSRegularExpression(pattern: regexPattern) else {
            return inputString
        }
        let range = NSRange(inputString.startIndex..<inputString.endIndex, in: inputString)
        let matches = regex.matches(in: inputString, range: range)
        for match in matches.reversed() {
            if let swiftRange = Range(match.range, in: inputString) {
                var username = String(inputString[swiftRange])
                username.removeFirst()
                let url = &quot;[@\(username)](yourApp://users/\(username))&quot;
                inputString.replaceSubrange(swiftRange, with: url)
            }
        }

        return inputString
    }
}

然后你可以像这样获取带有URL的文本:

text.addAppURLToUser()

你可以在任何SwiftUI Text 中使用它:

extension String {
    var key: LocalizedStringKey {
        LocalizedStringKey(self)
    }
}

然后像这样调用它:Text(text.addAppURLToUser().key)

在支持iOS 15及更高版本的情况下,你可以在任何SwiftUI Text 中使用它,如下所示:

@available(iOS 15, *)
struct LinkView: View {
    let text = &quot;Tagging @sample @today and maybe someone else @test today I am attending with @someoneElse&quot;
    @Environment(\.openURL) private var openURL
    @State var selectedUser: String?
    var body: some View {
        VStack{
            Text(text.addAppURLToUser().key)
                .environment(\.openURL, OpenURLAction { url in
                    if let components = URLComponents(url: url, resolvingAgainstBaseURL: true){

                        var username = components.path
                        username.removeFirst()
                        selectedUser = username
                    }
                    return .handled
                })
            if let selectedUser = selectedUser {
                Text(&quot;tapped user = **\(selectedUser)**&quot;)
            }

        }
    }
}

希望这对你有所帮助!

英文:

You can create a URL using a URLScheme

Something like yourApp://users/username and then use Markdown + LocalizedStringKey and/or AttributedText

Your string should look like &quot;[@sample](yourApp://users/sample)&quot;

Then you can handle the tap with

@Environment(\.openURL) private var openURL

This elaborates some more.

https://stackoverflow.com/questions/75192976/listen-to-link-click-in-swiftui-textview/75201168#75201168

You can replace your current function with something like

extension String {
    /// Replaces `&quot;@\\w+&quot;` with `&quot;[@\(username)](yourApp://users/\(username))&quot;`
    func addAppURLToUser() -&gt; String {
        var inputString = self
        let regexPattern = &quot;@\\w+&quot;
        
        guard let regex = try? NSRegularExpression(pattern: regexPattern) else {
            return inputString
        }
        let range = NSRange(inputString.startIndex..&lt;inputString.endIndex, in: inputString)
        let matches = regex.matches(in: inputString, range: range)
        for match in matches.reversed() {
            if let swiftRange = Range(match.range, in: inputString) {
                var username = String(inputString[swiftRange])
                username.removeFirst()
                let url = &quot;[@\(username)](yourApp://users/\(username))&quot;
                inputString.replaceSubrange(swiftRange, with: url)
            }
        }
        
        return inputString
    }
}

Then you can get URL filled text like this

text.addAppURLToUser()

You can use it in any SwiftUI Text with

extension String {
    var key: LocalizedStringKey {
        LocalizedStringKey(self)
    }
}

Then call it like Text(text.addAppURLToUser().key)

@available(iOS 15, *)
struct LinkView: View {        
    let text = &quot;Tagging @sample @today and maybe someone else @test today I am attending with @someoneElse&quot;
    @Environment(\.openURL) private var openURL
    @State var selectedUser: String?
    var body: some View {
        VStack{
            Text(text.addAppURLToUser().key)
                .environment(\.openURL, OpenURLAction { url in
                    if let components = URLComponents(url: url, resolvingAgainstBaseURL: true){
                        
                        var username = components.path
                        username.removeFirst()
                        selectedUser = username
                    }
                    return .handled
                })
            if let selectedUser = selectedUser {
                Text(&quot;tapped user = **\(selectedUser)**&quot;)
            }
            
        }
    }
}

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  • 本文由 发表于 2023年5月23日 00:02:46
  • 转载请务必保留本文链接:https://go.coder-hub.com/76308018.html
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