iOS动态照片

在iOS9以上提供了预览LivePhoto的API，可以在APP当中获取和显示动态照片了。

Live Photo

用于表示动态照片的数据是PHLivePhoto类，此类暂时没有提供更多的信息。如果需要将动态照片的数据上传的话，就需要Photo框架提供的数据访问了。
PHLivePhotoView用于显示，是UIView的子类。

获取

需要设置mediaTypes属性为@[(NSString *)kUTTypeImage, (NSString *)kUTTypeLivePhoto]。
头文件<MobileCoreServices/MobileCoreServices.h>详细的描述了如何来表示多媒体信息的一些定义，这样的定义规范属于UTI规范。

UIImagePickerController *picker = [[UIImagePickerController alloc]init];
picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
picker.allowsEditing = NO;
picker.delegate = self;

// make sure we include Live Photos (otherwise we'll only get UIImages)
NSArray *mediaTypes = @[(NSString *)kUTTypeImage, (NSString *)kUTTypeLivePhoto];
picker.mediaTypes = mediaTypes;

// bring up the picker
[self presentViewController:picker animated:YES completion:nil];

处理获取数据

使用PHLivePhotoView显示有交互的动态照片。

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info {
    NSLog(@"media: %@", info);
    NSLog(@"media: %@", [info objectForKey:UIImagePickerControllerLivePhoto]);
    PHLivePhoto *livePhoto = [info objectForKey:UIImagePickerControllerLivePhoto];

    PHLivePhotoView *liveView = [[PHLivePhotoView alloc] initWithFrame:self.view.frame];
    liveView.livePhoto = livePhoto;
    [self.view addSubview:liveView];

    [picker dismissViewControllerAnimated:YES completion:nil];
}

这没啥可说的。