在Swift中执行POST请求 [英] Perform POST request in Swift

问题描述

我正在尝试这样做：

NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"http://google.com"]];

request.HTTPMethod = @"POST";

NSString *stringData = @"some data";
NSData *requestBodyData = [stringData dataUsingEncoding:NSUTF8StringEncoding];
request.HTTPBody = requestBodyData;

NSURLConnection *conn = [[NSURLConnection alloc] initWithRequest:request delegate:self];

这是我到目前为止：

var url = NSURL(string: "some url")
var request = NSMutableURLRequest(URL: url)
request.HTTPMethod = "POST"

var dataString = "some data"
var requestBodyData: NSData = dataString.stringByAddingPercentEscapesUsingEncoding(NSUTF8StringEncoding) as NSData

request.HTTPBody = requestBodyData

var connection = NSURLConnection(request: request, delegate: self, startImmediately: false)

println("sending request...")

connection.start()

然而，var requestBodyData：行抛出了第一块无法将表达式类型NSData转换为类型NSData

However, the var requestBodyData: line throws the first stone with "Cannot convert the expression's type NSData to type NSData"

有人想要权衡吗？

推荐答案

stringByAddingPercentEscapesUsingEncoding 返回一个字符串而不是NSData对象。根据这个答案，您需要使用它来转换为NSData实例：

stringByAddingPercentEscapesUsingEncoding returns a string instead of an NSData object. According to this answer, you need to use this to convert to an NSData instance:

let data = (anySwiftString as NSString).dataUsingEncoding(NSUTF8StringEncoding)

这篇关于在Swift中执行POST请求的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！