[英]Storing data from an asynchronous closure during URLSession.shared.dataTask
[英]iOS: Data from URLSession.shared.dataTask(with: url is always nil (display 0 bytes bug in xcode debugger?)
我嘗試了在網上找到的代碼,但數據始終為零。 但是當我在 safari 中點擊它時,我可以看到結果......
let urlStr = "https://gmxx2.x.frxx.com:x/xxx/xxx/FR&174"
let url = URL(string: urlStr)
URLSession.shared.dataTask(with: url!, completionHandler: {
(data, response, error) in
if(error != nil){
print("error")
}else{
do{
let json = try JSONSerialization.jsonObject(with: data!, options:.allowFragments) as! [String : AnyObject]
OperationQueue.main.addOperation({
})
}catch let error as NSError{
print(error)
}
}
}).resume()
這是似乎沒有顯示問題的響應值:
▿ Optional<NSURLResponse>
- some : <NSHTTPURLResponse: 0x6000004e14c0> { URL: https://www.burningmeter.com/tournaments.json?page=1 } { Status Code: 200, Headers {
"Access-Control-Allow-Origin" = (
"*");
"Cache-Control" = (
"max-age=0, private, must-revalidate");
Connection = (
"keep-alive");
"Content-Type" = (
"application/json; charset=utf-8");
Date = (
"Fri, 08 Feb 2019 10:46:28 GMT" );
Etag = (
"W/\"c9cf3d615d984a1392782546f941543b\"");
Server = (
Cowboy);
"Strict-Transport-Security" = (
"max-age=31536000");
"Transfer-Encoding" = (
Identity);
Via = (
"1.1 vegur");
"X-Content-Type-Options" = (
nosniff);
"X-Frame-Options" = (
SAMEORIGIN);
"X-Request-Id" = (
"08e98d62-cf30-4028-9cd9-12668f1754ca");
"X-Runtime" = (
"0.021782" );
"X-Xss-Protection" = (
"1; mode=block");} }
錯誤值等於 nil。
我確切地說我在info.plist
中將App Transport Security Settings
為YES
編輯:
它與 [] 選項一起工作,但我只尋找等於 0 字節的數據值,但 json 有一個值,所以它可以工作。
即使有那個參數:
EDIT2:但是當我嘗試使用該 WS 時: https://gmp2.newtelapps.fr:5000/guests/contacts/FR&174
://gmp2.newtelapps.fr:5000/guests/contacts/FR&174它不起作用。
我能看到的唯一區別是 safari 中的響應格式
https://www.burningmeter.com/tournaments.json?page=1
=> {...}
https://gmxx2.x.frxx.com:x/xxx/xxx/FR&174
=> [{...}]
錯誤消息: Could not cast value of type '__NSArrayI' (0x108ac6da8) to 'NSDictionary' (0x108ac5818).
提前致謝。
我對你的代碼做了一些修改,我已經調試並得到了響應。
let urlString = "https://www.burningmeter.com/tournaments.json?page=1"
guard let requestUrl = URL(string:urlString) else { return }
var request = URLRequest(url:requestUrl)
request.httpMethod = "GET"
let task = URLSession.shared.dataTask(with: request) {
(data, response, error) in
if error == nil, let usableData=data {
let response = try? JSONSerialization.jsonObject(with: usableData, options:[])
print(response) //JSONSerialization
}
}
task.resume()
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