iphone - iphone5 IOS录音时如何使用振动？

Question

我正在开发 iphone5 应用程序，我需要一些关于振动电机的建议。我用眼睛盯着这些东西，但找不到如何从代码中手动旋转我的 iPhone。请指导我......或提供任何链接或想法......

我想做的是在录制视频时让手机振动。

但我的问题是，当我开始振动时，它无法录制视频。我发现它在捕获正在运行的音频时不起作用。所以我尝试在录制时将声音静音，但它仍然无法正常工作

以下是我的代码..

//
//  APPViewController.m
//  
//
//  Created by Rafael Garcia Leiva on 29/04/13.
//  Copyright (c) 2013 Appcoda. All rights reserved.
//

#import "APPViewController.h"
#import <AudioToolbox/AudioToolbox.h>
#import <AVFoundation/AVFoundation.h>

@interface APPViewController ()

@end

@implementation APPViewController

- (void)viewDidLoad {

    [super viewDidLoad];



}

- (void)viewDidAppear:(BOOL)animated {

    self.movieController = [[MPMoviePlayerController alloc] init];
    [self.movieController setContentURL:self.movieURL];

    [self.movieController.view setFrame:CGRectMake ( 0, 0, 320, 476)];

    [self.view addSubview:self.movieController.view];

    [[NSNotificationCenter defaultCenter] addObserver:self
                                          selector:@selector(moviePlayBackDidFinish:)
                                          name:MPMoviePlayerPlaybackDidFinishNotification
                                          object:self.movieController];

    [[MPMusicPlayerController applicationMusicPlayer] setVolume:0];

    [self.movieController play];

    [self setupAudio];



}

- (IBAction)takeVideo:(UIButton *)sender {

    UIImagePickerController *picker = [[UIImagePickerController alloc] init];
    picker.delegate = self;
    picker.allowsEditing = YES;
    picker.sourceType = UIImagePickerControllerSourceTypeCamera;
    picker.mediaTypes = [[NSArray alloc] initWithObjects: (NSString *) kUTTypeMovie, nil];




    [self presentViewController:picker animated:YES completion:NULL];
    while(TRUE){

        AudioServicesPlaySystemSound(kSystemSoundID_Vibrate);

    }



}

- (void)setupAudio {
    [[AVAudioSession sharedInstance] setCategory: AVAudioSessionCategoryPlayback error: nil];
    UInt32 doSetProperty = 1;
    AudioSessionSetProperty (kAudioSessionProperty_OverrideCategoryMixWithOthers, sizeof(doSetProperty), &doSetProperty);
    [[AVAudioSession sharedInstance] setActive: YES error: nil];
}


- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {

    self.movieURL = info[UIImagePickerControllerMediaURL];

    [picker dismissViewControllerAnimated:YES completion:NULL];

}

- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {

    [picker dismissViewControllerAnimated:YES completion:NULL];

}

- (void)moviePlayBackDidFinish:(NSNotification *)notification {

    [[NSNotificationCenter defaultCenter]removeObserver:self name:MPMoviePlayerPlaybackDidFinishNotification object:nil];

    [self.movieController stop];
    [self.movieController.view removeFromSuperview];
    self.movieController = nil;

}

@end

我正在用它振动我的手机，但它正在振动或正在录制视频...如果录制视频时没有声音，那么对我来说就没问题了..

while(TRUE){

        AudioServicesPlaySystemSound(kSystemSoundID_Vibrate);

    }

谢谢

Answer 1

我猜测录制 API 可能会在内部禁用振动(以及其他系统声音)，因为录制期间的振动会严重降低录制的视频和音频质量。

当然，我只是猜测。这似乎是 Apple 可能会做的事情，而且我认为在大多数情况下这就是您想要的(例如，您不希望录音被传入的短信或电话破坏)。我很好奇你为什么要在录音时振动设备 - 是为了特殊效果吗？