我有一个用于按钮的 Swift 函数,当按下该按钮时,它会通过 PHP 将一些详细信息写入数据库:
@IBAction func createCommunityButtonTapped(_ sender: AnyObject) {
let communityName = communityNameTextField.text;
if (communityName!.isEmpty){
displayMyAlertMessage(userMessage: "You must name your Community");
return;
}else{
func generateRandomStringWithLength(length: Int) -> String {
var randomString = ""
let letters = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
for _ in 1...length {
let randomIndex = Int(arc4random_uniform(UInt32(letters.characters.count)))
let a = letters.index(letters.startIndex, offsetBy: randomIndex)
randomString += String(letters[a])
}
return randomString
}
let communityCode = generateRandomStringWithLength(length: 6)
passwordTextField.text = communityCode
let myUrl = URL(string: "http://www.quasisquest.uk/KeepScore/createCommunity.php?");
var request = URLRequest(url:myUrl!);
request.httpMethod = "POST";
let postString = "communityname=\(communityName!)&code=\(communityCode)&email=\(myEmail!)";
request.httpBody = postString.data(using: String.Encoding.utf8);
let task = URLSession.shared.dataTask(with: request) { (data, response, error) in
if (try! JSONSerialization.jsonObject(with: data!, options: .allowFragments) as? [String:AnyObject]) != nil {
}
}
task.resume()
}
}
除了我将此 echo json
行添加到 PHP 脚本中之外,该函数工作得很好:
if($newresult)
{
$returnValue["status"] = "Success";
$returnValue["message"] = "Community is registered";
echo json_encode($returnValue);
return;
}
然后我在这一行收到错误 Thread 8: EXC_BAD_INSTRUCTION (code=EXC_I386_INVOP, subside = 0x0)
:
if (try! JSONSerialization.jsonObject(with: data!, options: .allowFragments) as? [String:AnyObject]) != nil {
}
并且在调试区有以下详细信息
数据数据?一些
响应 URLResponse? 0x0000618000223500
错误错误?零 无
我想我漏掉了一行,或者需要为 JSONSerialization 设置一个变量而不是“try!”但我不确定是什么。
最佳答案
您正在返回 null
。试试这个
if($newresult)
{
$returnValue["status"] = "Success";
$returnValue["message"] = "Community is registered";
return json_encode($returnValue);
}
关于php - 从 PHP 脚本接收 'json_encode' 时 Swift JSON 出错。没有它也能正常工作,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/40149491/