Question

After recording with AVAudioRecorder the resulting sound file has to be sent to a webservice. The file data has to be URL encoded and copied into the body of the POST request. The recording format is kAudioFormatAppleLossless. As a first step, prior to URL encoding, I tried to copy the .caf file into a NSString, using

NSStringEncoding encoding;
 NSString * filestring = [NSString 
                         stringWithContentsOfURL:self.audioRecorder.url 
                     usedEncoding:&encoding 
                         error:&error];

我有以下错误:

Error territorial=NSCocoaErrorDomain Code=264 “这项行动可能已完成。 (Cocoa差错264)”

The encoding returned was 0x5bab9f0, which is not among the list of values defined for NSStringEncoding. What encoding does AVAudioRecorder use when writing to the file? What is the best way of converting a binary file to a URL encoded string?

Answer 1

Never. Use. NSString. For. Data. That s. Not. A. String... Use NSData instead, you won t need to URLEncode it (because it already is ).

你们可以这样做:

NSMutableData *postData = [[NSMutableData alloc] init];
[postData appendData:[@"--boundary
Content-Disposition: form-data; name="myfile"; filename="ad.gif"

" dataUsingEncoding:NSUTF8StringEncoding]];
[postData appendData:[NSData dataWithContentsOfURL:self.audioRecorder.url]];
[postData appendData:[@"
--boundary--
" dataUsingEncoding:NSUTF8StringEncoding]];

[myRequest setHTTPMethod:@"POST"]; // this you probably already did.
[myRequest setHTTPBody:postData];

友情链接