iPhone 3.2 Base64 编码
我将基本 HTTP 授权标头添加到请求中，但需要将 authString 编码为 Base64。有关信息，由于产生过多的 401 错误，我无法使用 didReceiveAuthenticationChallenge。
下面的代码在 iOS 4.2 中工作正常，但在 iOS 3.2 上不起作用（我想支持这一点）。
<代码> NSString *authString = [[[NSString stringWithFormat:@"%@:%@", user, password] dataUsingEncoding:NSUTF8StringEncoding] base64Encoding];
authString = [NSString stringWithFormat: @"Basic %@", authString];
NSMutableURLRequest* request =
[[NSMutableURLRequest alloc] initWithURL: url
cachePolicy:NSURLRequestReloadIgnoringLocalCacheData
timeoutInterval: 30];
[request setValue: authString forHTTPHeaderField: @"Authorization"];
connection = [[NSURLConnection alloc] initWithRequest:request delegate:self startImmediately:YES];
在上面代码的第一行中我收到 NSData 不会响应“base64Encoding”的警告。
所以我从这里下载了自定义类 NSData+Base64： http://cocoawithlove.com/2009/06/base64 -encoding-options-on-mac-and.html
但是......我不知道如何使用这个类来转换我的NSString（authString）。请帮忙？！
我认为以下代码行应该修复： <代码> NSString *authString = [[[NSString stringWithFormat:@"%@:%@", user, password] dataUsingEncoding:NSUTF8StringEncoding] base64EncodedString];
但我收到以下消息：
* 正在终止应用程序由于未捕获的异常“NSInvalidArgumentException”，原因：“-[NSConcreteMutableData base64EncodedString]：无法识别的选择器发送到实例
我是否错过了导入或其他内容？
PS这是我在这里提出的第一个问题，所以请放轻松！
I'm adding a Basic HTTP Authorisation Header into a request but need to encode the authString to Base64. For info, I can't use didReceiveAuthenticationChallenge due to excessive 401 errors being produced.
The code below works fine in iOS 4.2 but doesn't work on iOS 3.2 (and I want to support this).
NSString *authString = [[[NSString stringWithFormat:@"%@:%@", user, password] dataUsingEncoding:NSUTF8StringEncoding] base64Encoding];
authString = [NSString stringWithFormat: @"Basic %@", authString];
NSMutableURLRequest* request =
[[NSMutableURLRequest alloc] initWithURL: url
cachePolicy:NSURLRequestReloadIgnoringLocalCacheData
timeoutInterval: 30];
[request setValue: authString forHTTPHeaderField: @"Authorization"];
connection = [[NSURLConnection alloc] initWithRequest:request delegate:self startImmediately:YES];
In the first line of my code above I get the warning that NSData will not respond to 'base64Encoding'.
So I've downloaded the custom class NSData+Base64 from here:
http://cocoawithlove.com/2009/06/base64-encoding-options-on-mac-and.html
But......I don't know how to use this class to convert my NSString (authString). Please help?!
I think the following line of code should fix:
NSString *authString = [[[NSString stringWithFormat:@"%@:%@", user, password] dataUsingEncoding:NSUTF8StringEncoding] base64EncodedString];
but I get following message:
* Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[NSConcreteMutableData base64EncodedString]: unrecognized selector sent to instance
Have I missed an Import or something?
P.S. This is my first question on here, so go easy on me!!
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NSString有一个-dataUsingEncoding:方法，您可以使用该方法将NSString实例转换为NSData实例。之后就可以使用MG的Base64类别了。NSStringhas a-dataUsingEncoding:method which you can use to convertNSStringinstances toNSDatainstances. After that, you can use MG's Base64 category.您是否创建了类别以在 NSData 类中使用 BASE64Encoding 方法？在这里，我制作了一个轻松创建类别的教程，这些类别基本上是对现有类的修改，在本例中为 NSData： http://www.donttouchmycode.com/objective-c-class/extending-an-existing-class-with-categories 我希望这可以帮助你。
Have you created the category to use the BASE64Encoding method in your NSData class?? here i made a tutorial to easy create categories, which basically are modifications of an existing class, in this case NSData: http://www.donttouchmycode.com/objective-c-class/extending-an-existing-class-with-categories i hope this can help you.