Question

我有以下代码让用户拍照或从相册中选择。虽然从相机拍摄照片效果很好，但当我选择触发动作的按钮时，专辑会出现，但实际上您无法选择照片。当我从相机方法启动拍摄时，启动从相册方法中选择时，我确实在控制台中收到警告。以下是相关代码和警告。

.h

@interface sitespecTakePhoto : UIViewController <UIImagePickerControllerDelegate,                       UINavigationControllerDelegate>
@property (strong, nonatomic) NSString *pbvlocname;
@property (strong, nonatomic) IBOutlet UITextField *descTextField;
@property (strong, nonatomic) IBOutlet UIImageView *imageField;
@property (strong, nonatomic) UIImagePickerController *imagePicker;
@property (nonatomic, strong) IBOutlet UILabel *successLabel;
@property UIImage *imageToSend;
@property NSString *desc;
- (IBAction)imageFromCamera:(id)sender;
- (IBAction)resignKeyboard:(id)sender;
-(IBAction)uploadButtonClicked:(id)sender;
@end

.m

- (IBAction)imageFromCamera:(id)sender
{

imagePicker = [[UIImagePickerController alloc] init];
imagePicker.delegate = self;
imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;
imagePicker.cameraDevice = UIImagePickerControllerCameraDeviceRear;
[self presentViewController:imagePicker animated:YES completion:nil];
}

- (IBAction)imageFromAlbum:(id)sender
{
imagePicker = [[UIImagePickerController alloc] init];
imagePicker.delegate = self;
imagePicker.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;

[self presentViewController:imagePicker animated:YES completion:nil];

}

#pragma mark - Image Picker Delegate Methods

//  Dismiss the image picker on selection and use the resulting image in our ImageView
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:    (UIImage *)image editingInfo:(NSDictionary *)editingInfo
{

[[imagePicker presentingViewController] dismissViewControllerAnimated:YES completion:nil];
[imageField setImage:image];
imageToSend = image;



}

//  On cancel, only dismiss the picker controller
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker
{
[[imagePicker presentingViewController] dismissViewControllerAnimated:YES   completion:nil];
}


 - (IBAction)resignKeyboard:(id)sender
{
desc = descTextField.text;
[sender resignFirstResponder];
}

以及按下按钮以触发imageFromAlbum方法时出现的警告：

 Warning: Attempt to present <UIImagePickerController: 0x1d59d6b0> on <UINavigationController: 0x1e0319f0> while a presentation is in progress!

再一次，专辑显示但是当您点击图像或按下取消按钮时没有任何反应，我觉得这个方法几乎不识别UIImagePicker委托方法而imageFromCamera方法是。提前谢谢任何帮助！

Answer 1

错误消息中的关键短语是“在演示文稿正在进行中”。这表明你在另一个presentViewController被解雇时正在这样做。我敢打赌，你不小心将这个按钮挂钩到两个方法，以便它试图同时执行两个presentViewController命令。使用Interface Builder右侧的连接检查器将其理顺。

UIImagepicker适用于相机，但不适用于相册

1 个答案: