Question

我正在尝试从相机获取图像并将拍摄的图像放入UIImageView（不使用相机胶卷 - 直接从相机到UIImageView）。几周来我一直努力尝试解决这个问题但没有成功。有谁知道为什么这不起作用？

仅供参考，我一直在做什么？

使用以下代码
按按钮打开相机UI
按捕获按钮拍摄图像
按＆＃34;使用照片＆＃34;按钮选择照片
期待照片放在屏幕上的UIImageView中（但它没有...）
沮丧的感觉

如果一个聪明的程序员可以帮我解决这个问题，我将不胜感激。我觉得我做的一切都是我读他人告诉我的事情。任何代码类型的更正都将非常有用。谢谢！

 - (IBAction)cameraButtonPushed:(id)sender {

if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera] == NO) {
    //todo if device has no camera

    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Unable To Locate Camera" message:@"No Camera found." delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil, nil];

    [alert show];
}

else {

    UIImagePickerController *cameraUI = [[UIImagePickerController alloc] init];
    cameraUI.delegate = delegate;
    cameraUI.allowsEditing = YES;
    cameraUI.sourceType = UIImagePickerControllerSourceTypeCamera;

    cameraUI.mediaTypes =
    [UIImagePickerController availableMediaTypesForSourceType: UIImagePickerControllerSourceTypeCamera];

    [self presentViewController:cameraUI animated:YES completion:^{

    }];

    }

}

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

[picker dismissViewControllerAnimated:YES completion:^{

    UIImage *takenImage = [info valueForKey:UIImagePickerControllerEditedImage];

    [self.navigationController pushViewController:self animated:YES];

    image = [[UIImageView alloc] initWithImage:takenImage];

}];

}

Answer 1

试试这个：

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
    [picker dismissViewControllerAnimated:YES
                               completion:^{
                                   UIImage *takenImage = [info valueForKey:UIImagePickerControllerEditedImage];

                                   image = [[UIImageView alloc] initWithImage:takenImage];
                                   [self.view addSubview:image];

                                   //or if object is connected properly via IB then simply
                                   //[image setImage:takenImage];
                               }];
}

根据@DouglasFerreira的敏锐观察

cameraUI.delegate = delegate;

应该是

cameraUI.delegate = self;

Answer 2

如果image是IBOutlet，则您不必初始化它：它将由您的故事板或您的XIB完成。尝试设置图像：

[image setImage: takenImage];

Answer 3

您可以使用以下方法完成任务，但请确保将视图控制器委托给UIImagePickerControllerDelegate，UINavigationControllerDelegate

- (IBAction)takePhoto:(id)sender {

UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.delegate = self;
picker.allowsEditing = YES;
picker.sourceType = UIImagePickerControllerSourceTypeCamera;

[self presentViewController:picker animated:YES completion:NULL];
}



- (void) imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info {

UIImage *chosenImage = info[UIImagePickerControllerEditedImage];
self.imageView.image = chosenImage;

[picker dismissViewControllerAnimated:YES completion:NULL];
}

Xcode：从直接放置在UIImageView中的相机拍摄的图像

3 个答案: