在相机应用程序中单击“使用时保存照片”按钮

Question

我当前的代码是：

- (IBAction)cameraButtonAction:(id)sender {   
    UIImagePickerController *picker = [[UIImagePickerController alloc] init];
    picker.allowsEditing = NO;
    picker.sourceType = (sender == cameraButton) ? UIImagePickerControllerSourceTypeCamera : UIImagePickerControllerSourceTypeSavedPhotosAlbum;
    [self presentModalViewController:picker animated:YES]; 
}

这是调出默认相机，但当我选择use 时，它不会保存图片。我试过了：

-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)image editingInfo:(NSDictionary *)editingInfo {
    UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil);
    [self dismissModalViewControllerAnimated:YES];
}

我看过的每个教程，他们使用UIImageView 制作了一个自定义相机应用程序，但这不是我想要做的，我不想在应用程序中显示图像并希望保留默认相机功能。

Answer 1

您的代码是正确的。但是你没有设置委托

你在这里少了一行：

picker.delegate = self;

您需要在 cameraButtonAction 方法中添加它。

- (IBAction)cameraButtonAction:(id)sender
{   
    UIImagePickerController *picker = [[UIImagePickerController alloc] init];
    picker.delegate = self;
    picker.allowsEditing = NO;
    picker.sourceType = (sender == cameraButton) ? UIImagePickerControllerSourceTypeCamera : UIImagePickerControllerSourceTypeSavedPhotosAlbum;
    [self presentModalViewController:picker animated:YES]; 
}