도래울

data에서 json은 SwiftyJSon 라이브러리를 이용. filename : test.json if let path = Bundle.main.path(forResource: "test", ofType: "json") { do { let data = try? Data(contentsOf: URL(fileURLWithPath: path), options: NSData.ReadingOptions.mappedIfSafe) let jsonObj = JSON(data: data!) if jsonObj != JSON.null { print(jsonObj.arrayObject) } else { print("could not get json from file, make sure that file contains v..

print("completionHandler시작") self.callBackTest(param1: "param1") {retStr in print("completionHandler끝 ret : \(retStr)") } print("completionHandler비동기") private func callBackTest(param1 :String ,completionHandler:@escaping (_ ret : String) -> Void) { DispatchQueue.global(qos: .userInitiated).async { print(param1) for i in 0..