Question

我目前有一个UIImageView和一个UIImage。如何让用户从相机胶卷中选择一张照片？

有possible duplicates，但我没有运气。这可能是因为我没有在Interface Builder中挂钩。

我想要像UIImage * image = [UIImage imageFromCameraRoll]那样简单，但不幸的是，这是不可能的（至少我不这么认为）。

Answer 1

试试此代码

帮助您从cameraroll＆amp; photolibrary。使用UIImagePickerViewController

如果拍摄照片

从相机（在UINavigationcontroller中打开）。
来自Gallery（对于ipad打开为UIpopovercontroller＆amp;为iphone打开为nvigationcontroller）。

首先设置代理

@interface camera : UIViewController <UIImagePickerControllerDelegate, UINavigationControllerDelegate,UIPopoverControllerDelegate>

从相机中获取图片

if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera])
        {
            UIImagePickerController *imagePicker =
            [[UIImagePickerController alloc] init];
            imagePicker.delegate = self;
            imagePicker.sourceType =
            UIImagePickerControllerSourceTypeCamera;
            imagePicker.mediaTypes = [NSArray arrayWithObjects:
                                      (NSString *) kUTTypeImage,
                                      nil];

            imagePicker.allowsEditing = YES;

            imagePicker.wantsFullScreenLayout = YES;

            [self presentViewController:imagePicker animated:YES completion:nil];
            newMedia = YES;
            iscamera = 0;
        }
        else
        {
            UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Error to access Camera"
                                                            message:@""
                                                           delegate:nil
                                                  cancelButtonTitle:@"OK"
                                                  otherButtonTitles:nil];
            [alert show];

        }

从图库中获取图片

 if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary])
    {
        UIImagePickerController *_picker=nil;
        if (popoverController) {
            [popoverController dismissPopoverAnimated:NO];

        }
        _picker = [[UIImagePickerController alloc] init];
        _picker.delegate = self;        
        _picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
        _picker.wantsFullScreenLayout = YES;

        //[popoverController presentPopoverFromBarButtonItem:sender
                               //   permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];

        if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone) {

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


        } else
        {
            popoverController = [[UIPopoverController alloc] initWithContentViewController:_picker];
            [popoverController setDelegate:self];
            [popoverController presentPopoverFromRect:btn.frame
                                               inView:self.view
                             permittedArrowDirections:UIPopoverArrowDirectionLeft
                                             animated:YES];
        }
    }
    else
    {
        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Error access photo library"
                                                        message:@"your device non support photo library"
                                                       delegate:nil
                                              cancelButtonTitle:@"OK"
                                              otherButtonTitles:nil];
        [alert show];

    }

两种结果都是您参与委托方法

-(void)imagePickerController:(UIImagePickerController *)picker
didFinishPickingMediaWithInfo:(NSDictionary *)info
{
   // write your code here ........
 }

Answer 2

使用UIImagePickerController，请参阅Apple文档。

选择源类型：

@property (nonatomic) UIImagePickerControllerSourceType sourceType

从这些开始：

UIImagePickerControllerSourceTypePhotoLibrary,
UIImagePickerControllerSourceTypeCamera,
UIImagePickerControllerSourceTypeSavedPhotosAlbum

从iPhone相机胶卷获取图像

2 个答案: