php - 使用变量打开 URL

Question

所以我在我使用的服务器上有一个 php 注册脚本。

我如何获取文本框的输入(或与这些框的内容相关的变量/指针)，并将它们放入 url 中以注册用户。同样，PHP 和 SQL 数据库都已设置好，我只是在 iOS 中遇到了问题。

示例:

VARIABLE --- PURPOSE
uname        username
pass         password
name         first name
lname        last name

现在我需要将其放入这样的 url 中

https://mywebsite/register.php?username=uname&password=pass&firstname=name&lastname=lname&sumbit=submit

该脚本运行良好，我只需要帮助在 iOS 中实现它。

非常感谢。你们真棒!

Answer 1

您可以将 NSURLConnection 与 NSMutableURLRequest 结合使用，如下所示:

//Prepare URL for post
NSURL *url = [NSURL URLWithString: @"https://mywebsite/register.php"];

//Prepare the string for your post (do whatever is necessary)
NSString *postString = [@"username=" stringByAppendingFormat: @"%@&password=%@", uname, pass];

//Prepare data for post
NSData *postData = [postString dataUsingEncoding:NSUTF8StringEncoding];
NSString *postLength = [NSString stringWithFormat:@"%d", [postData length]];

//Prepare request object
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
[request setURL:url];
[request setTimeoutInterval:20];
[request setHTTPMethod:@"POST"];
[request setValue:postLength forHTTPHeaderField:@"Content-Length"];
[request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
[request setHTTPBody:postData];

//send post using NSURLConnection
NSURLConnection connection = [[NSURLConnection alloc]initWithRequest:request delegate:self];

//Connection should never be nil
NSAssert(connection != nil, @"Failure to create URL connection.");

这(根据您的需要调整 postString)应该向您的服务器异步发送 POST 请求(在您的应用程序的后台)，并且服务器上的脚本会运行。

假设你的服务器也在返回一个答案，你可以这样听:
使用 NSURLConnection connection = [[NSURLConnection alloc]initWithRequest:request delegate:self]; 创建连接时，我们告诉连接我们处理服务器在同一个对象中返回的内容，即 self。

当连接返回一个答案时，调用以下三个方法(将它们放在与上面代码相​​同的类中):

-(void)connection:(NSURLConnection*)connection didReceiveResponse:(NSURLResponse*)response
{
    //Initialize received data object        
        self.receivedData = [NSMutableData data];
        [self.receivedData setLength:0];

    //You also might want to check if the HTTP Response is ok (no timeout, etc.) 
}

-(void)connection:(NSURLConnection*)connection didReceiveData:(NSData*)data
{     
    [self.receivedData appendData:data];
}

-(void)connection:(NSURLConnection*)connection didFailWithError:(NSError*)error
{
    NSLog(@"Connection failed with err");
}

-(void)connectionDidFinishLoading:(NSURLConnection*)connection
{
    //Connection finished loading. Processing the server answer goes here.

}

请记住，您必须处理 https 连接/请求附带的服务器身份验证。要允许任何服务器证书，您可以依赖以下解决方案(尽管这只是推荐用于快速原型(prototype)设计和测试): How to use NSURLConnection to connect with SSL for an untrusted cert?

希望对您有所帮助。