如何通过iMe​​ssage ios 8发送音频文件

Question

As we know with the launch of ios 8 the apple allow custom Keyboard extension.In keyboard extension we can send images,gif etc in SMS by using Copy image to clipboard.code

 UIPasteboard *pasteboard = [UIPasteboard generalPasteboard];
 NSData *data= UIImagePNGRepresentation([UIImage imageNamed:@"so_close_disappointed_meme.png"]);
 [pasteboard setData:data forPasteboardType:@"public.png"];

Now i am trying to send audio file in iMessage like this feature reference .don't know apple will allow us to send audio in iMessage?.so for i tried above approach but it did not show any paste option for audio in SMS window.

 UIPasteboard *pasteboard = [UIPasteboard generalPasteboard];
 NSString *path = [[NSBundle mainBundle] pathForResource:@"tune"ofType:@"mp3"];
 NSURL *url = [[NSURL alloc] initWithString:path];
 NSData *data = [NSData dataWithContentsOfURL:url];
 [pasteboard setData:data forPasteboardType:@"public.mp3"];

Any one can suggest me how do we send audio file by using custom keyboard extension.is it possible?

Answer 1

I believe you could directly attach the file to MFMessageComposeViewController . Here is the documentation link of how it could be done.

Following would be the steps to do so.

1. Check if file can be send using file UTI using + (BOOL)isSupportedAttachmentUTI:(NSString *)uti
2. Find File UTI. ie path for the file
3. Attach file to MFMessageComposeViewController using - (BOOL)addAttachmentData:(NSData *)attachmentData typeIdentifier:(NSString *)uti filename:(NSString *)filename

As the description for the method says

This method is especially useful when the attachment you want to add to a message does not have a file system representation. This can be the case, for example, for programmatically composed audiovisual content.

Note : You will have to convert audio file to NSData

Answer 2

The MFMessageComposeViewController isn't the solution in this scenario. A custom keyboard extension shouldn't present a new view controller, rather just paste the audio file to the pasteboard. Heres some swift code that worked for me

let path = NSBundle.mainBundle().pathForResource("audio", ofType:"wav")
let fileURL = NSURL(fileURLWithPath: path!)
let data = NSData(contentsOfURL: fileURL)
let wavUTI = "com.microsoft.waveform-audio"
UIPasteboard.generalPasteboard().setData(data!, forPasteboardType: wavUTI)