Question

在我的应用中，我使用以下代码访问相机以更改用户的个人资料照片。但我无法访问相机。

 if ([UIImagePickerController isSourceTypeAvailable: UIImagePickerControllerSourceTypeCamera])
    {
        UIImagePickerController *picker = [[UIImagePickerController alloc] init];
        picker.delegate = self;
        picker.allowsEditing = YES;
        picker.sourceType = UIImagePickerControllerSourceTypeCamera;
 if(isIOS8SystemVersion)
        {
            [[NSOperationQueue mainQueue] addOperationWithBlock:^{
                [self presentViewController:picker animated:YES completion:NULL];
            }];
        }
        else
        {
            [self presentViewController:picker animated:YES completion:NULL];
        }

此代码适用于iOS 7.x的iPhone 4（16gb）。 但在iOS 9中，呈现的viewController显示为黑屏，我无法拍摄。与photoLibrary的情况相同 。相同的代码适用于同一设备中的其他应用。

我在Stack Overflow中经历了很多问题并尝试了很多解决方案。但是它们并不适用于我。就像为UIImagePIcker控制器等制作一个单例。等等。

在设置 - >隐私 - >相机 - ＆gt; 中，我无法看到本节中列出的应用。

为了让iOS应用可以访问相机和照片，要做些什么呢？我错过了什么吗？

Answer 1

只是延迟你的功能打开相机，它会正常工作：D 使用以下代码：

[self performSelector:@selector(showCamera) withObject:nil afterDelay:1.0];


-(void)showCamera
{
if ([UIImagePickerController isSourceTypeAvailable: UIImagePickerControllerSourceTypeCamera])
{
    UIImagePickerController *picker = [[UIImagePickerController alloc] init];
    picker.delegate = self;
    picker.allowsEditing = YES;
    picker.sourceType = UIImagePickerControllerSourceTypeCamera;
    if(isIOS8SystemVersion)
    {
        [[NSOperationQueue mainQueue] addOperationWithBlock:^{
            [self presentViewController:picker animated:YES completion:NULL];
        }];
    }
    else
    {
        [self presentViewController:picker animated:YES completion:NULL];
    }
}

Answer 2

首先调用此方法并确定摄像机的权限

-(void)PermissionForCamera
{
    NSString *mediaType = AVMediaTypeVideo;
    AVAuthorizationStatus authStatus = [AVCaptureDevice authorizationStatusForMediaType:mediaType];

    if(authStatus == AVAuthorizationStatusAuthorized)
    {
        NSLog(@"AVAuthorizationStatusAuthorized");
        // run your code for camera
        ImagePicker = [[UIImagePickerController alloc] init];
        [ImagePicker setDelegate:self];
        ImagePicker = UIImagePickerControllerSourceTypeCamera;

        [[NSOperationQueue mainQueue] addOperationWithBlock:^{
            [self ImagePicker animated:YES completion:nil];
        }];
    }
    else if(authStatus == AVAuthorizationStatusNotDetermined)
    {
        NSLog(@"AVAuthorizationStatusNotDetermined");
        // run your code for camera
        ImagePicker = [[UIImagePickerController alloc] init];
        [ImagePicker setDelegate:self];
        ImagePicker = UIImagePickerControllerSourceTypeCamera;

        [[NSOperationQueue mainQueue] addOperationWithBlock:^{
            [self ImagePicker animated:YES completion:nil];
        }];
    }
    else
    {
        // turn on the camera permission from settings
    }


}

iOS相机权限：相机在iphone和ipad上显示为黑色（UIImagePickerController问题iOS 9）

2 个答案: