我无法从我的 HTTP 请求返回数据,我也无法让完成处理程序工作。所以请帮助我解决这个问题:
public static func createRequest(qMes: message, location: String, method: String) -> String{
let requestURL = URL(string: location)
var request = URLRequest(url: requestURL!)
request.httpMethod = method
request.httpBody = qMes.toString().data(using: .utf8)
let requestTask = URLSession.shared.dataTask(with: request) {
(data: Data?, response: URLResponse?, error: Error?) in
if(error != nil) {
print("Error: \(error)")
}
return String(data: data!, encoding: String.Encoding.utf8) as String!
}
requestTask.resume()
}
在 void 函数中期待非 void return 语句。在这一点上我毫 headless 绪...
最佳答案
您可以使用此完成 block 方法发送最终响应:
例如: 我在完成 block 中返回了字符串,成功响应后没有错误,只需将结果传递到 block 中。
public func createRequest(qMes: String, location: String, method: String , completionBlock: @escaping (String) -> Void) -> Void
{
let requestURL = URL(string: location)
var request = URLRequest(url: requestURL!)
request.httpMethod = method
request.httpBody = qMes.data(using: .utf8)
let requestTask = URLSession.shared.dataTask(with: request) {
(data: Data?, response: URLResponse?, error: Error?) in
if(error != nil) {
print("Error: \(error)")
}else
{
let outputStr = String(data: data!, encoding: String.Encoding.utf8) as String!
//send this block to required place
completionBlock(outputStr!);
}
}
requestTask.resume()
}
您可以使用下面的代码来执行上面的完成 block 功能:
self.createRequest(qMes: "", location: "", method: "") { (output) in
}
这将解决您的以下需求。
关于ios - Swift 从 URLSession 返回数据,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/43048120/