Ios 如何在Photos框架中从assetURL获取PHAsset?
我想使用assetURL获取PHAsset。 我使用了以下代码:Ios 如何在Photos框架中从assetURL获取PHAsset?,ios,photosframework,phasset,phphotolibrary,Ios,Photosframework,Phasset,Phphotolibrary,我想使用assetURL获取PHAsset。 我使用了以下代码: NSURL *assetURL=[NSURL URLWithString:file.filePath]; PHFetchResult *fetchResult=[PHAsset fetchAssetsWithALAssetURLs:@[assetURL] options:nil]; PHAsset *asset= [fetchResult firstObject]; file.filePath具有
NSURL *assetURL=[NSURL URLWithString:file.filePath];
PHFetchResult *fetchResult=[PHAsset fetchAssetsWithALAssetURLs:@[assetURL] options:nil];
PHAsset *asset= [fetchResult firstObject];
file.filePath具有我从中获取的资源url
[[PHImageManager defaultManager]
requestImageDataForAsset:asset
options:imageRequestOptions
resultHandler:^(NSData *imageData, NSString *dataUTI,
UIImageOrientation orientation,
NSDictionary *info)
{[uploadingFile setValue:[NSString stringWithFormat:@"%@",[info valueForKey:@"PHImageFileURLKey"]] forKey:@"filePath"];}
但是我总是把fetchResult
的值取为nil
。有人能告诉我哪里出了问题吗?
是因为我传递了错误的URL类型吗?您可以使用:
PHContentEditingInputRequestOptions * editOperations = [[PHContentEditingInputRequestOptions alloc]init];
editOperations.networkAccessAllowed = NO;
editOperations.canHandleAdjustmentData =^BOOL(PHAdjustmentData * data){
return NO;
};
dispatch_semaphore_t sema = dispatch_semaphore_create(0);
dispatch_group_t group = dispatch_group_create();
dispatch_async(dispatch_get_global_queue(0, 0), ^{
[asset requestContentEditingInputWithOptions:editOperations completionHandler:^(PHContentEditingInput * _Nullable contentEditingInput, NSDictionary * _Nonnull info) {
if (asset.mediaType & PHAssetMediaTypeImage) {
BOOL isDownLoading = ![info objectForKey:PHImageCancelledKey]
&& ![info objectForKey:PHImageErrorKey] && ![info objectForKey:PHImageResultIsDegradedKey];
if (isDownLoading) {
mode_asset.mode_fileUrl = [contentEditingInput.fullSizeImageURL absoluteString];
mode_asset.mode_UTI = contentEditingInput.fullSizeImageURL.pathExtension;
mode_asset.mode_fileName = contentEditingInput.fullSizeImageURL.lastPathComponent;
}
if (mode_asset.mode_filePathBlock) {
mode_asset.mode_filePathBlock(mode_asset);
}
}
// dispatch_group_leave(group);
// dispatch_semaphore_signal(sema);
}];
});
我发现一个问题,调用此方法导致出现问题,此方法可以阻止UI,请等待阻止回调,请告诉我