Swift 3 - 发送同步http请求

使用Swift编程语言，我们可以轻松地发送同步的HTTP请求。在本文中，我们将探讨如何使用Swift 3来实现这个功能，并提供一些案例代码供参考。

swift
import Foundation
func sendGetRequest() {
    // Step 1: 创建URL对象
    if let url = URL(string: "https://api.example.com/data.json") {
        
        // Step 2: 创建URLRequest对象
        var request = URLRequest(url: url)
        request.httpMethod = "GET"
        
        // Step 3: 发送请求并获取响应数据
        let semaphore = DispatchSemaphore(value: 0)
        let task = URLSession.shared.dataTask(with: request) { (data, response, error) in
            if let data = data {
                // Step 4: 处理响应数据
                if let json = try? JSONSerialization.jsonObject(with: data, options: []),
                   let dict = json as? [String: Any] {
                    print(dict)
                }
            }
            semaphore.signal()
        }
        task.resume()
        
        // 等待响应数据返回
        semaphore.wait()
    }
}
sendGetRequest()

swift
import Foundation
func sendPostRequest() {
    // Step 1: 创建URL对象
    if let url = URL(string: "https://api.example.com/submit") {
        
        // Step 2: 创建URLRequest对象
        var request = URLRequest(url: url)
        request.httpMethod = "POST"
        
        // Step 3: 创建表单数据
        let formData = "username=johndoe&password=secret"
        request.httpBody = formData.data(using: .utf8)
        
        // Step 4: 发送请求并获取响应数据
        let semaphore = DispatchSemaphore(value: 0)
        let task = URLSession.shared.dataTask(with: request) { (data, response, error) in
            if let data = data {
                // Step 5: 处理响应数据
                if let dict = try? JSONSerialization.jsonObject(with: data, options: []) as? [String: Any] {
                    print(dict)
                }
            }
            semaphore.signal()
        }
        task.resume()
        
        // 等待响应数据返回
        semaphore.wait()
    }
}
sendPostRequest()