cocoa-touch - Objective C - 通过 MFMailComposeViewController 的附件未显示

Question

我正在尝试从 iOS 应用程序附加一个 wav 文件，但即使附件在撰写的邮件中可见，也未送达。

相关代码如下:

if ([MFMailComposeViewController canSendMail]) {
    MFMailComposeViewController* controller = [[MFMailComposeViewController alloc] init];
    controller.mailComposeDelegate = self;
    [controller setSubject:NSLocalizedString(@"mailTopic", nil)];
    [controller setMessageBody:NSLocalizedString(@"mailBody", nil) isHTML:YES];
    NSString *wavPath = [self exportAssetAsWaveFormat:self.myRec.soundFilePath]; // CAF->Wav export

    if (wavPath != nil) {
        NSLog(@"wavPath: %@", wavPath);
        NSData *recData = [NSData dataWithContentsOfFile:wavPath];
        NSString *mime = [self giveMimeForPath:wavPath];
        [controller addAttachmentData:recData mimeType:mime fileName:@"MySound.wav"];
        [self presentModalViewController:controller animated:YES];
        [controller release];
    }
}


-(NSString *) giveMimeForPath:(NSString *)filePath {
    NSURL* fileUrl = [NSURL fileURLWithPath:filePath];
    NSURLRequest* fileUrlRequest = [[NSURLRequest alloc] initWithURL:fileUrl cachePolicy:NSURLCacheStorageNotAllowed timeoutInterval:.1];
    NSURLResponse* response = nil;

    [NSURLConnection sendSynchronousRequest:fileUrlRequest returningResponse:&response  error:nil];
    NSString* mimeType = [response MIMEType];
    NSLog(@"MIME: %@", mimeType);
    [fileUrlRequest release];

    return mimeType;
}

NSLog 结果:

NSLog(@"wavPath: %@", wavPath); ->“wavPath:/var/mobile/Applications/71256DCA-9007-4697-957E-AEAE827FD97F/Documents/MySound.wav”

NSLog(@"MIME: %@", mimeType); ->“MIME:音频/wav”

文件路径接缝没问题(参见 NSLog 数据)，并且 mime 类型设置为“audio/wav”..无法弄清楚这一点..

Answer 1

错误是当我用它创建 NSData 时，wav 文件还没有 100% 写入..duuuh

感谢大家的努力