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[英]Alamofire completionHandler of responseJSON is not called
[英]CompletionHandler for Alamofire
我正在嘗試返回responseJSON
static func getAllPersons(completionhandler:@escaping (Any) -> ()){
let URL = baseURL + "api/person"
Alamofire.request(URL).responseJSON {
response in
completionhandler(response.result.value as Any)
}
}
但是,如果我嘗試將responseJSON存儲在“ res”中,將無法正常工作:
var res: Any = ""
PersonResource.getAllPersons{ (result) in
res = result
}
print(res)
最好的祝福
response.result.value是可選的,因此請嘗試返回Any?。 但這是更好的方法:
static func getAllPersons(completionhandler:@escaping ([String: Any]?, Error?) -> ()){
let URL = baseURL + "api/person"
Alamofire.request(URL).responseJSON {
response in
if let json = response.result.value as? [String: Any] {
completionhandler(json, nil)
}
else if let error = response.result.error as Error? {
completionHandler(nil, error)
}
}
}
var res: Any = ""
PersonResource.getAllPersons{ (result) in
res = result
print(res)
}
將print語句放入其中將打印結果
為什么呢
PersonResource.getAllPersons是一個異步調用,因此即使在PersonResource.getAllPersons的完成塊執行並設置res之前,也要執行print(res)
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