如何快速修复“无法将“[Any]"类型的值转换为“强制转换"中的“字符串"错误 [英] How to fix 'Cannot convert value of type '[Any]' to type 'String' in coercion' error in swift
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问题描述
我使用 socket.io websocket 从后端获取数据,并使用 environmentObject 将其推送到 View(SwiftUI),但问题是我无法获取数据,因为它的类型为 Any
I use a socket.io websocket to get data from my backend and I push it with an environmentObject to the View(SwiftUI) but the problem is that I can't get the data because it is of type Any
我已经尝试使用guard var data = socketData else { return }",但是出现了这个错误:条件绑定的初始值设定项必须具有 Optional 类型,而不是 '[Any]'
I already tried to use "guard var data = socketData else { return }" but there is this error: Initializer for conditional binding must have Optional type, not '[Any]'
import SwiftUI
import SocketIO
import Combine
let manager = SocketManager(socketURL: URL(string: "http://localhost:30000/ios")!, config: [.log(true), .compress])
let socket = manager.defaultSocket
class Socket: BindableObject {
let didChange = PassthroughSubject<Socket,Never>()
var days: String = "Loading..." {
didSet {
didChange.send(self)
}
}
static let sharedInstance = Socket()
init() {
socket.on(clientEvent: .connect) {data, ack in
print("socket connected")
}
socket.on("dailyWeather") {data, ack in
print("just a test")
var data = data as String //Here is the current error
/*do {
let decoder = JSONDecoder()
decoder.keyDecodingStrategy = .convertFromSnakeCase
let city = try decoder.decode(day.self, from: data)
self.weatherData.city = city.name
} catch {
print(error)
}*/
self.days = "cur"
}
}
func establishConnection() {
socket.connect()
}
func closeConnection() {
socket.disconnect()
}
}
错误:无法在强制转换中将[Any]"类型的值转换为String"类型
Error: Cannot convert value of type '[Any]' to type 'String' in coercion
推荐答案
得到解决方案:
var arr = data[0]
yourString: String = (arr as AnyObject).description
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