Watchkit presentAudioRecordingControllerWithOutputURL 完成块问题

Question

我只是试图满足以下函数的参数以调出录音机。我相信问题出在完成块上。调试中给出的错误是：

presentAudioRecordingControllerWithOutputURL:preset:maximumDuration:actionTitle:completion: 需要非 NULL URL 和完成块

NSBundle* myBundle = [NSBundle mainBundle];
NSURL* recording = [myBundle URLForResource:@"recording" withExtension:@"mp4"];

[self presentAudioRecordingControllerWithOutputURL:recording
                                            preset:WKAudioRecordingPresetWideBandSpeech
                                   maximumDuration:5000
                                       actionTitle:@"Recording"
                                        completion:^(BOOL didSave, NSError *error) {
                                            if (error != nil)
                                            {
                                               NSLog(@"Error: %@",error);
                                            }
                                            else if(didSave == YES)
                                            {
                                                NSLog(@"Saved the recording");
                                            }
                                        }];

Answer 1

我猜你的文件 URL recording 是错误的。您无法录制到“主包”中。所以无法创建 NSURL 对象并发生非 NULL 错误。

例如，您可以按如下方式记录到 documents 目录中：

NSArray *filePaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,
                                                         NSUserDomainMask,YES);
NSString *path = [[filePaths firstObject] stringByAppendingPathComponent:@"recording.mp4"];
NSURL *fileUrl = [NSURL fileURLWithPath:path];

[self presentAudioRecordingControllerWithOutputURL:fileUrl
                                            preset:WKAudioRecordingPresetWideBandSpeech
                                   maximumDuration:5000
                                       actionTitle:@"Recording"
                                        completion:^(BOOL didSave, NSError * __nullable error) {

                                            NSLog(@"didSave:%d, error:%@", didSave, error);
                                        }];