Swift - 类型“（字符串，JSON）”不能符合“字符串协议”； 只有结构/枚举/类类型可以符合协议

Question

I'm using SwiftyJSON . Ultimately I want to see if the "date" value equals the value of selectedDate and if so, print the "event" value.

But I haven't even got that far yet. I'm getting an error on my if statement.

The error I'm receiving says Type '(String, JSON)' cannot conform to 'StringProtocol'; only struct/enum/class types can conform to protocols Type '(String, JSON)' cannot conform to 'StringProtocol'; only struct/enum/class types can conform to protocols .

data.json

[
 {
      "date": "01.01",
      "event": "Mom birthday",
     
  },
]

ViewController.swift

var json:JSON = false    
var selectedDate:String = "01.01"

func updateView() {
    
    json.forEach { (key, data) in
        if key == "date", data.stringValue == selectedDate {
            print("found it!")
        } else {
            print("no matches")
        }
    }
    
}

override func viewDidLoad() { super.viewDidLoad()

    // Get JSON data
    if let path = Bundle.main.path(forResource: "Devotions", ofType: "json") {
        do {
            let data = try Data(contentsOf: URL(fileURLWithPath: path), options: .alwaysMapped)
            json = try JSON(data: data)
        } catch let error {
            print("parse error: \(error.localizedDescription)")
        }
    } else {
        print("Invalid filename/path.")
    }
    
    updateView()
    
}

Answer 1

You can modify related line like:

data.forEach { (key, data) in
    if key == "date", data.stringValue == selectedDate {
        print("found it!")
    }
}

Or you can access directly like;

data["date"].stringValue == selectedDate