XYPhotoKit

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

使用方式

详情见demo查看

相册获取方式

用法

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;
}

相机获取方式

用法

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;
}

综述

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; }
}];

todo & upgrade

• [x] 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
• [x] 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