基于PhotoKit开发的照片获取方式，支持多选单选（对应的UI略有不同），支持iCloud获取相册等
详情见demo查看
| 属性 | 说明 |
|---|---|
| Controller | |
| XYPhotoMultiImagePicker | NavigationController,承载两个VC栈、相册相关参数初始化工作及 delegate & datasource |
| XYPhotoAlbumListController | 系统和用户的相册列表（tableview），根据CLPhotoMultiPickerStartPosition来确定初始展示哪个VC界面 |
| XYPhotoAlbumDetailController | 某个相册的详情（collectionView），单选多选照片的不同交互主要完成于此，可进入大图预览 |
| XYPhotoPreviewViewController | 大图预览（XYHorizontalScrollView） |
XYPhotoMultiImagePicker *multiImagePicker = [[XYPhotoMultiImagePicker alloc] init];
multiImagePicker.pickerDelegate = self;
multiImagePicker.pickerDataSource = self;
multiImagePicker.mediaType = PHAssetMediaTypeImage; // 支持图片和视屏
multiImagePicker.maxNumberOfAssets = 9; // 最多选择九张照片
multiImagePicker.assetCollectionViewColumnCount = 4; // 获取
multiImagePicker.startPosition = CLPhotoMultiPickerStartPositionAlbums; // 相册列表开始进入
multiImagePicker.allowNetRequestIfiCloud = YES; // 支持iCloud网络获取
[self presentViewController:multiImagePicker animated:YES completion:nil];
#pragma mark - XYPhotoMultiImagePickerDelegate, XYPhotoMultiImagePickerDataSource
- (void)multiImagePicker:(XYPhotoMultiImagePicker *)multiImagePicker selectedAssets:(NSArray<PHAsset *> *)assets
{
_selectedAssets = assets;
NSLog(@"%@", @(assets.count));
}
- (NSArray<PHAsset *> *)multiImagePickerLoadPresetSelectedAssets
{
return _selectedAssets;
}
| 属性 | 说明 |
|---|---|
| Controller | |
| XYPhotoMultiCameraPicker | NavigationController,承载XYPhotoCameraController、相机相关参数初始化工作及 delegate & datasource |
| XYPhotoCameraController | 基于ImagePickerController，需要有相机和相册两个权限做交互，可进入大图预览 |
| XYPhotoPreviewViewController | 大图预览（XYHorizontalScrollView） |
XYPhotoMultiCameraPicker *camera = [[XYPhotoMultiCameraPicker alloc] init];
camera.pickerDelegate = self;
camera.pickerDataSource = self;
camera.maxNumberOfAssets = 9; // 最多选择九张照片
camera.allowNetRequestIfiCloud = YES; // 支持iCloud网络获取
[self presentViewController:camera animated:YES completion:nil];
#pragma mark - XYPhotoMultiCameraPickerDelegate, XYPhotoMultiCameraPickerDataSource
- (void)multiCameraPicker:(XYPhotoMultiCameraPicker *)multiImagePicker selectedAssets:(NSArray<PHAsset *> *)assets
{
_selectedAssets = assets.copy;
NSLog(@"%@",assets);
}
- (NSArray<PHAsset *> *)multiCameraPickerLoadPresetSelectedAssets
{
return _selectedAssets;
}
以上获取都是PHAsset对象，PHAsset 非常灵活，详见文档，同步异步请求、支持网络、请求progress等等可以查看 PHImageRequestOptions
例如：支持网络获取（如果是本地就直接本地获取）asset对象大小为
targetSize的图片 闭包中可能会有多次回调（本地图片）越来越高清，当网络请求时非特殊情况下不可直接获取原图尺寸CGSizeMake(asset.pixelWidth, asset.pixelHeight)
PHImageRequestOptions *options = [[PHImageRequestOptions alloc] init];
options.networkAccessAllowed = YES;
_imageRequestId = [self.imageManager requestImageForAsset:asset
targetSize:_targetSize
contentMode:PHImageContentModeAspectFit
options:options
resultHandler:^(UIImage *result, NSDictionary *info) {
BOOL downloadFinined = ![[info objectForKey:PHImageCancelledKey] boolValue]
&& ![info objectForKey:PHImageErrorKey]
&& ![[info objectForKey:PHImageResultIsDegradedKey] boolValue];
if (downloadFinined) { self.imageRequestId = 0; }
if (result) { self.imageView.image = result; }
}];- 视频播放
- 拆分类的层级（比如接入LocalImagePicker等等）
- 完善其他获取照片的拓展方法 & 工具（视频压缩、图片压缩，指定相册图片写入等等）
- 添加iCloud加载的请求等待提示
- 大图预览添加过渡动画，视频播放、消失添加fade
- 大图预览改换使用pageController
- 持久化&有效性验证：对PHAsset持久化存储只需储存
photoAsset.localIdentifier的唯一标识，验证对象是否还存在于相册中（即有效性）需要对唯一标识做遍历对比
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