在 Swift 中将 CGPoint 数组转换为字符串

Question

I have array of points like:

[(32.33332824707031, 237.0), (105.33332824707031, 355.3333282470703), (124.0, 355.3333282470703), (165.3333282470703, 240.0), (116.33332824707031, 199.66665649414062)]

I created a dictionary out of this array as

let dic : Dictionary<String, [CGPoint]> = [ "ARRAY" : points]

I create a jsondata to create a json string as below

let jsonData = try? JSONSerialization.data(withJSONObject: dic, options: .prettyPrinted)

But i am getting error as:

Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Invalid type in JSON write (NSConcreteValue)'.

Answer 1

Tuples aren't codable but CGPoint is so either keep your original CGPoint array if you have one or map the array from tuple to CGPoint

let points = array.map {CGPoint(x: $0.0, y: $0.1)}

let dic : Dictionary<String, [CGPoint]> = [ "ARRAY" : points]
do {
    let encoder = JSONEncoder()
    encoder.outputFormatting = .prettyPrinted

    let data = try encoder.encode(dic)
    print(String(data: data, encoding: .utf8)!)
} catch {
    print(error)
}