#pragma mark 相册操作
- (void)getOriginalImages{
//获取所有自定义相簿
PHFetchResult*assetCollections = [PHAssetCollection fetchAssetCollectionsWithType:PHAssetCollectionTypeSmartAlbum subtype:PHAssetCollectionSubtypeAlbumRegular options:nil];
//便利所有相册簿
for (PHAssetCollection *assetCollection in assetCollections) {
[self enumerateAssetsInAssetCollection:assetCollection original:YES];
NSLog(@"相册名%@",assetCollection.localizedTitle); }
// PHAssetCollection *cameraRoll = [PHAssetCollection fetchAssetCollectionsWithType:PHAssetCollectionTypeSmartAlbum subtype:PHAssetCollectionSubtypeSmartAlbumUserLibrary options:nil].lastObject;
// [self enumerateAssetsInAssetCollection:cameraRoll original:YES];
}
//获取所有相册中的缩略图 //没用
- (void)getThumbnailImages{
PHFetchResult*assetCollections = [PHAssetCollection fetchAssetCollectionsWithType:PHAssetCollectionTypeSmartAlbum subtype:PHAssetCollectionSubtypeAlbumRegular options:nil];
for (PHAssetCollection *assetCollection in assetCollections) {
[self enumerateAssetsInAssetCollection:assetCollection original:NO];
}
PHAssetCollection *cameraRoll = [PHAssetCollection fetchAssetCollectionsWithType:PHAssetCollectionTypeAlbum subtype:PHAssetCollectionSubtypeSmartAlbumUserLibrary options:nil].lastObject;
[self enumerateAssetsInAssetCollection:cameraRoll original:NO];}
/* 遍历相册中的原图 @param assetCollection 相册 @param original 是否要原图 */- (void)enumerateAssetsInAssetCollection:(PHAssetCollection *)assetCollection original:(BOOL)original{ PHImageRequestOptions *options = [[PHImageRequestOptions alloc] init];
//同步获得智慧返回一张 options.synchronous = YES;
//获得某个相册中所有的phasset对象
PHFetchResult*assets = [PHAsset fetchAssetsInAssetCollection:assetCollection options:nil];
// NSLog(@"图片数量:%lu",(unsigned long)assets.count);
if(assets.count){
//
ZCCPhoneAlbumModel *albumModel = [[ZCCPhoneAlbumModel alloc] init];
// NSLog(@"相册名%@",assetCollection.localizedTitle);
//相册名给对象
albumModel.photoAlbumName = assetCollection.localizedTitle;
NSMutableArray *picsArray = [NSMutableArray array];
for (PHAsset *asset in assets) {
// CGSize size = original ? CGSizeMake(asset.pixelWidth, asset.pixelHeight) : CGSizeZero;
//宽大于高 就把高变成 asset.pixelHeight * COLLECTIONWIDTH/asset.pixelHeight
CGFloat width = 0;
CGFloat height = 0;
//宽大于高 压缩高
if(asset.pixelWidth > asset.pixelHeight){
width = asset.pixelWidth * COLLECTIONWIDTH/asset.pixelHeight;
height = COLLECTIONWIDTH;
}else{//宽小于高 压缩宽
width = COLLECTIONWIDTH;
height = asset.pixelHeight * COLLECTIONWIDTH/asset.pixelWidth;
}
CGSize size = CGSizeMake(width, height);
//从asset中获得图片
[[PHImageManager defaultManager] requestImageForAsset:asset targetSize:size contentMode:PHImageContentModeDefault options:options resultHandler:^(UIImage * _Nullable result, NSDictionary * _Nullable info) {
// NSLog(@"%@",result);
[picsArray addObject:result];
}];
}
albumModel.photos = picsArray;
//把这个相册对象添加到相册数组中
[self.photoAlbums addObject:albumModel];
}
}
其实这里可以通过 打开collectionView获取contentoffsize来判断当前滑动位置 然后 加载 总图片的对应阶段图片 边滑动边加载 这样就不会造成刚点开的卡顿了 有空实现一下。
