我在登录时将我的用户 JSON 数据存储在“用户”上。单击保存按钮时如何更改值？例如:crew_preferred_name 到“Xiao Pang”。
UserDefaults.standard.set(json, forKey: "json")
user = UserDefaults().value(forKey: "json")as? NSDictionary
这是 JSON 输出
}
crew ={
"crew_avatar" = "http://ec2-52-221-231-3.ap-southeast-1.compute.amazonaws.com/gv/images/profile_image/Pang_Kang_Ming_916210_0e9.jpg";
"crew_contact" = 0123456789;
"crew_email" = "pang@xover.com.my";
"crew_gender" = Male;
"crew_id" = PP000001;
"crew_name" = "Pang Kang Ming";
"crew_preferred_name" = PKM;
"crew_qrcode" = "images/qrcode/qrcode_085960293a5378a64bec6ebfa3c89bb7.png"; }
message = "Login Sucessfully";
result = success;
}
这是按钮代码，我将操作发布到 php，但不知道如何更改或保存“用户”数据中的更改。如果没有代码，我必须重新登录才能看到新的更新。
@IBAction func saveBtn(_ sender: Any) {
let preferName = preferNameEditLabel.text!;
if let crew = user!["crew"] as? [String:Any], let crewID = crew["crew_id"] as? String, let crewEmail = crew["crew_email"] as? String, let crewContact = crew["crew_contact"] as? String {
let param = ["action": "update profile", "crew": ["crew_id": crewID, "crew_preferred_name": preferName, "crew_email": crewEmail, "crew_contact": crewContact]] as [String : Any]
let headers = [
"content-type": "application/json",
"cache-control": "no-cache"
]
if let postData = (try? JSONSerialization.data(withJSONObject: param, options: [])) {
let request = NSMutableURLRequest(url: URL(string: "http://52.221.231.3/gv/app_api.php")!,
cachePolicy: .useProtocolCachePolicy,
timeoutInterval: 10.0)
request.httpMethod = "POST"
request.allHTTPHeaderFields = headers
request.httpBody = postData
_ = URLSession.shared
if preferNameEditLabel.text != ""{
let task = URLSession.shared.dataTask(with: request as URLRequest) {
(data, response, error) -> Void in
DispatchQueue.main.async(execute: {
if let json = (try? JSONSerialization.jsonObject(with: data!, options: [.mutableContainers])) as? NSDictionary
{
let result = json["result"] as? String
if (result == "success") {
print(result!)
self.view.endEditing(true)
let alert = UIAlertController(title: "Updated", message: "Update Successfully", preferredStyle: UIAlertControllerStyle.alert)
let okButton = UIAlertAction(title: "OK", style: UIAlertActionStyle.cancel, handler: nil)
alert.addAction(okButton)
self.present(alert, animated: true, completion: nil)
}else{
let alert = UIAlertController(title: "Error", message: "Update Failed", preferredStyle: UIAlertControllerStyle.alert)
let okButton = UIAlertAction(title: "OK", style: UIAlertActionStyle.cancel, handler: nil)
alert.addAction(okButton)
self.present(alert, animated: true, completion: nil)
print(result!)
}
}
})
}
task.resume()
}else{
let alert = UIAlertController(title: "Error", message: "Empty!", preferredStyle: UIAlertControllerStyle.alert)
let okButton = UIAlertAction(title: "OK", style: UIAlertActionStyle.cancel, handler: nil)
alert.addAction(okButton)
self.present(alert, animated: true, completion: nil)
}
}
}
}
最佳答案
不要在 Swift 中使用 NSDictionary，使用它的原生 Swift 对应物，Dictionary。
然后您可以像这样访问和更改与已知键关联的值(您需要确保 json 的类型是 [String:Any]在将其保存到 UserDefaults 以使此代码正常工作之前):
UserDefaults.standard.set(json, forKey: "json")
user = UserDefaults().value(forKey: "json") as! [String:Any]
user["crew_name] = "Pang Kang Feng"
关于json - 单击保存按钮时如何更改存储的 JSON 数据？ swift 3，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/45794517/