如何创建像Instagram一样的自定义照片视图？

Question

我想创建像Instagram库一样的自定义照片视图。

默认情况下它显示“相机胶卷”的照片，当我点击它就会显示我的设备的所有专辑列表上的任何专辑或文件夹，点击它会重新与点击相册中的所有照片。

我该怎么做？

Answer 1

您可使用照片框架来获取您的画廊中的所有图像，并显示所有图像根据您的要求

PHFetchResult *smartAlbums = [PHAssetCollection 
fetchAssetCollectionsWithType:PHAssetCollectionTypeSmartAlbum 
subtype:PHAssetCollectionSubtypeAlbumRegular options:nil]; 

//set up fetch options, mediaType is image. 
PHFetchOptions *options = [[PHFetchOptions alloc] init]; 
options.sortDescriptors = @[[NSSortDescriptor sortDescriptorWithKey:@"creationDate" ascending:NO]]; 
options.predicate = [NSPredicate predicateWithFormat:@"mediaType = %d",PHAssetMediaTypeImage]; 

for (NSInteger i =0; i < smartAlbums.count; i++) { 
    PHAssetCollection *assetCollection = smartAlbums[i]; 
    PHFetchResult *assetsFetchResult = [PHAsset fetchAssetsInAssetCollection:assetCollection options:options]; 

    NSLog(@"sub album title is %@, count is %ld", assetCollection.localizedTitle, (unsigned long)assetsFetchResult.count); 
    if (assetsFetchResult.count > 0 && ![assetCollection.localizedTitle isEqualToString: @"Recently Deleted"]) { 

     for (PHAsset *asset in assetsFetchResult) { 

      //you have got your image type asset. 
      PHImageRequestOptions *option = [PHImageRequestOptions new]; 
      option.synchronous = YES; 

      [[PHImageManager defaultManager] requestImageForAsset:asset targetSize:CGSizeMake(self.view.frame.size.width, self.view.frame.size.height-100) contentMode:PHImageContentModeAspectFit options:option resultHandler:^(UIImage * _Nullable result, NSDictionary * _Nullable info) { 
      [self.imagesURLArray addObject:result]; 

      NSLog(@"asset are %@", asset); 
     } 
    } 

} 

Answer 2

这里是一个很好的图书馆做同样的。

YPImagePicker