将HTTP标头添加到NSURLRequest

问题描述

有没有办法将HTTP标头添加到 NSURLRequest 对象？我曾经在 NSMutableURLRequest 中添加它们：

Is there any way to add HTTP header to NSURLRequest object? I used to add them in NSMutableURLRequest using:

[request addValue:@"PC" forHTTPHeaderField:@"machineName"]

推荐答案

我认为你不能修改 NSURLRequest 的HTTP标头。我想你正在尝试修改你没有初始化的 NSURLRequest 对象？

I don't think you can modify the HTTP Headers of a NSURLRequest. I think you're trying to modify a NSURLRequest object that you didn't initialize?

你可以创建一个您的请求的 mutableCopy 然后使用以下方法设置标题字段：

You could create a mutableCopy of your request and then set the header fields with the following method:

 -(void)setValue:(NSString *)value forHTTPHeaderField:(NSString *)field.

之后你可以复制可变请求返回 NSURLRequest 变量。

After that you can copy the mutable request back onto your NSURLRequest variable.

编辑：添加以下示例

/* Create request variable containing our immutable request
 * This could also be a paramter of your method */
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"http://www.stackoverflow.com"]];

// Create a mutable copy of the immutable request and add more headers
NSMutableURLRequest *mutableRequest = [request mutableCopy];
[mutableRequest addValue:@"Hless" forHTTPHeaderField:@"X-user-nick"];

// Now set our request variable with an (immutable) copy of the altered request
request = [mutableRequest copy];

// Log the output to make sure our new headers are there
NSLog(@"%@", request.allHTTPHeaderFields);

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