当我尝试注册时,我得到了正确的回复。但是在获得成功之后。我将崩溃视为可选值。
这是我的完整代码:
var post:NSString = "name=\(Username)&email=\(Email)&phone=\(phonenumb)&password=\(Password)&address=\(address)"
NSLog("PostData: %@",post);
var url:NSURL = NSURL(string: "http://userregistration.php")!
// let url:NSURL = NSURL(string: "http://userregistration.php")!
let postData:NSData = post.dataUsingEncoding(NSASCIIStringEncoding)!
let postLength:NSString = String( postData.length )
let request:NSMutableURLRequest = NSMutableURLRequest(URL: url)
request.HTTPMethod = "POST"
request.HTTPBody = postData
request.setValue(postLength as String, forHTTPHeaderField: "Content-Length")
request.setValue("application/x-www-form-urlencoded", forHTTPHeaderField: "Content-Type")
request.setValue("application/json", forHTTPHeaderField: "Accept")
let reponseError: NSError?
var response: NSURLResponse?
do {
let urlData = try? NSURLConnection.sendSynchronousRequest(request, returningResponse: &response)
if ( urlData != nil ) {
let res = response as! NSHTTPURLResponse!;
NSLog("Response code: %ld", res.statusCode);
if (res.statusCode >= 200 && res.statusCode < 300)
{
let responseData:NSString = NSString(data:urlData!, encoding:NSUTF8StringEncoding)!
NSLog("Response ==> %@", responseData);
do {
let jsonData = try NSJSONSerialization.JSONObjectWithData(urlData!, options: []) as! NSDictionary
let success:NSInteger = jsonData.valueForKey("success") as! NSInteger
//[jsonData[@"success"] integerValue];
NSLog("Success: %ld", success);
if(success == 1)
{
NSLog("Sign Up SUCCESS");
//self.dismissViewControllerAnimated(true, completion: nil)
} else {
var error_msg:NSString
if jsonData["error_message"] as? NSString != nil {
error_msg = jsonData["error_message"] as! NSString
} else {
error_msg = "Unknown Error"
}
let alertView:UIAlertView = UIAlertView()
alertView.title = "Sign Up Failed!"
alertView.message = error_msg as String
alertView.delegate = self
alertView.addButtonWithTitle("OK")
alertView.show()
}
} catch let error as NSError {
print("json error: \(error.localizedDescription)")
}
} else {
let alertView:UIAlertView = UIAlertView()
alertView.title = "Sign Up Failed!"
alertView.message = "Connection Failed"
alertView.delegate = self
alertView.addButtonWithTitle("OK")
alertView.show()
}
}
}
}
我在这一行中遇到了崩溃:
let success:NSInteger = jsonData.valueForKey("success") as! NSInteger
错误是选项值崩溃。我不知道如何处理这个错误。有任何专家请给我一些想法或一些解决方案以纠正此崩溃
答案 0 :(得分:0)
始终使用安全展开,并且不要直接尝试打开/转换可能为零的值。
正确的方法是 -
if let successVal = jsonData["success"] as? NSInteger {
//Do something with successVal.
}
虽然与您的问题没有直接关系,但想要指出您使用已弃用的NSURLConnection API,而是使用基于NSURLSession的API进行联网。
感谢
答案 1 :(得分:0)
查看回复,您将不会收到任何success
,但只有status
,您确定无法检查该值吗?
另外,我建议您将代码移动到:
guard let success = jsonData.valueForKey("success") as? Int else {
asset('Check your response, is missing success key')
return
}