當我嘗試為 api 內部的某些 ML 撰寫一些資料時，例如在 Postman 中，該條目有效，但出于某種原因，當我在 Swift 中撰寫它時，我遇到了一些麻煩：
func makePOSTRequest() {
print("entered request function")
guard let url = URL(string: "https://doctagon.herokuapp.com/diagnose") else {
print("error with getting the URL")
return
}
print("got the URL")
var request = URLRequest(url: url)
print("Got the request")
// method, body, headers?
request.httpMethod = "POST"
print("got the http.method = 'POST'")
// might not need this --> request.setValue(" symptoms", forHTTPHeaderField: "Content-Type")
let body: [String: AnyHashable] = [
"symptoms": ["Headache", "Sweating"]
]
print("got the body")
print("About to enter the .httpBody part of the code")
request.httpBody = try? JSONSerialization.data(withJSONObject: body, options: .fragmentsAllowed)
//Make the request
let task = URLSession.shared.dataTask(with: request) { data, _, error in
guard let data = data, error == nil else {
print("error with making sure that there is data")
return
}
print("got data")
do {
let response = try JSONSerialization.data(withJSONObject: data, options: .fragmentsAllowed)
print("SUCCESS \(response)")
} catch {
print("error with the conversion of the JSOn")
print(error)
}
}
task.resume()
print("resumed Task")
}
我的錯誤：
2022-11-19 23:39:30.335160-0500 Doctagon[88188:1838200] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Invalid type in JSON write (Foundation.__NSSwiftData)'
*** First throw call stack:
(
0 CoreFoundation 0x000000018040e7ec __exceptionPreprocess 172
1 libobjc.A.dylib 0x0000000180051144 objc_exception_throw 56
2 Foundation 0x0000000180c446f8 _writeJSONValue 704
3 Foundation 0x0000000180c443f8 -[_NSJSONWriter dataWithRootObject:options:] 84
4 Foundation 0x0000000180c470d0 [NSJSONSerialization dataWithJSONObject:options:error:] 108
5 Doctagon 0x0000000100be4080 $s8Doctagon12QuestionViewV15makePOSTRequestyyFy10Foundation4DataVSg_So13NSURLResponseCSgs5Error_pSgtYbcfU_ 544
6 Doctagon 0x0000000100be45ec $s10Foundation4DataVSgSo13NSURLResponseCSgs5Error_pSgIeghggg_So6NSDataCSgAGSo7NSErrorCSgIeyBhyyy_TR 264
7 CFNetwork 0x0000000183df9928 CFNetwork 31016
8 CFNetwork 0x0000000183e14a4c _CFHTTPMessageSetResponseProxyURL 14648
9 libdispatch.dylib 0x0000000104c30594 _dispatch_call_block_and_release 24
10 libdispatch.dylib 0x0000000104c31d5c _dispatch_client_callout 16
11 libdispatch.dylib 0x0000000104c3a040 _dispatch_lane_serial_drain 928
12 libdispatch.dylib 0x0000000104c3adb8 _dispatch_lane_invoke 484
13 libdispatch.dylib 0x0000000104c48b40 _dispatch_workloop_worker_thread 1720
14 libsystem_pthread.dylib 0x00000001af2568fc _pthread_wqthread 284
15 libsystem_pthread.dylib 0x00000001af2556c0 start_wqthread 8
)
libc abi: terminating with uncaught exception of type NSException
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Invalid type in JSON write (Foundation.__NSSwiftData)'
terminating with uncaught exception of type NSException
CoreSimulator 857.13 - Device: iPhone 14 Pro (4108291D-D836-4715-8386-5237B6D217E7) - Runtime: iOS 16.1 (20B72) - DeviceType: iPhone 14 Pro
我仍然不明白我的問題，因為我能夠在 Postman 中正常運行它，但是一旦我進入 Xcode，代碼就停止作業了。
我認為錯誤在這一行：let response = try JSONSerialization.data(withJSONObject: data, options: .fragmentsAllowed)
uj5u.com熱心網友回復：
您要做的是Dictionary<String: Any>使用從網路接收的資料創建一個 json 物件（在本例中它將是 的一個實體），因此您應該JSONSerialization.jsonObject(with: data)改為呼叫。
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標籤：数组JSON迅速