ios - 来自相机的多个 imagePicker

Question

我的 View Controller 上有 3 个 ImageView 。我可以选择从图库中选择或拍照。现在，我想要的是相机。我想默认选择图像，我们可以选择一张，但我想要三张，如何实现。

Answer 1

使用Tag概念`

第 1 步

最初为每个 imageView 分配标签为 1,2,3并具体介绍打开 UIImagePickerController 的一种常用方法

第 2 步

为每个图像创建手势

    UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleImageTap:)];
tap.cancelsTouchesInView = YES;
tap.numberOfTapsRequired = 1;
tap.delegate = self;
 imageView.userInteractionEnabled = YES;
[imageView addGestureRecognizer:tap];

调用方法如

- (IBAction)handleImageTap:(UIGestureRecognizer*)sender

{

UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"Attach image" message:@"" preferredStyle:UIAlertControllerStyleActionSheet];
UIAlertAction* pickFromGallery = [UIAlertAction actionWithTitle:@"Take a photo"
                                                          style:UIAlertActionStyleDefault
                                                        handler:^(UIAlertAction * action) {
                                                            if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera])
                                                            {
                                                                UIImagePickerController* picker = [[UIImagePickerController alloc] init];
                                                                picker.view.tag = sender.view.tag;
                                                                picker.sourceType = UIImagePickerControllerSourceTypeCamera;
                                                                picker.delegate = self;
                                                                picker.allowsEditing = YES;
                                                                [self presentViewController:picker animated:YES completion:NULL];
                                                            }

                                                        }];
UIAlertAction* takeAPicture = [UIAlertAction actionWithTitle:@"Choose from gallery"
                                                       style:UIAlertActionStyleDefault
                                                     handler:^(UIAlertAction * action) {
                                                         UIImagePickerController* picker = [[UIImagePickerController alloc] init];
                                                         picker.view.tag = sender.view.tag;
                                                         picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
                                                         picker.delegate = self;
                                                         picker.allowsEditing = YES;
                                                         [self  presentViewController:picker animated:YES completion:NULL];
                                                     }];
UIAlertAction* cancel = [UIAlertAction actionWithTitle:@"Cancel"
                                                 style:UIAlertActionStyleCancel
                                               handler:^(UIAlertAction * action) {
                                               }];

[alertController addAction:pickFromGallery];
[alertController addAction:takeAPicture];
[alertController addAction:cancel];
[self presentViewController:alertController animated:YES completion:NULL];

}

第 3 步

在该委托(delegate)方法上

-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info
{
if(picker.view.tag == 1)
{
 // assign the image to first
}
else if(picker.view.tag == 2)
{
 // assign the image to second
}
else
{

// assign the image to third
}

}