iOS8照片框架：如何获取相集的名称（或文件名）？
我正在尝试使用iOS8照片框架：如何获取相集的名称（或文件名）？,ios,phasset,Ios,Phasset,我正在尝试使用PHAssets获取图像名称。但是我找不到文件名的元数据，也找不到任何获取图像名称的方法。是否有其他方法获取文件名？如果您想获取像IMG_XXX.JPG这样的图像名（例如照片中最后一张照片的名称），您可以尝试以下方法： PHAsset *asset = nil; PHFetchOptions *fetchOptions = [[PHFetchOptions alloc] init]; fetchOptions.sortDescriptors = @[[NSSortDescripto
PHAssetsPHAsset *asset = nil;
PHFetchOptions *fetchOptions = [[PHFetchOptions alloc] init];
fetchOptions.sortDescriptors = @[[NSSortDescriptor sortDescriptorWithKey:@"creationDate" ascending:YES]];
PHFetchResult *fetchResult = [PHAsset fetchAssetsWithMediaType:PHAssetMediaTypeImage options:fetchOptions];
if (fetchResult != nil && fetchResult.count > 0) {
// get last photo from Photos
asset = [fetchResult lastObject];
}
if (asset) {
// get photo info from this asset
PHImageRequestOptions * imageRequestOptions = [[PHImageRequestOptions alloc] init];
imageRequestOptions.synchronous = YES;
[[PHImageManager defaultManager]
requestImageDataForAsset:asset
options:imageRequestOptions
resultHandler:^(NSData *imageData, NSString *dataUTI,
UIImageOrientation orientation,
NSDictionary *info)
{
NSLog(@"info = %@", info);
if ([info objectForKey:@"PHImageFileURLKey"]) {
// path looks like this -
// file:///var/mobile/Media/DCIM/###APPLE/IMG_####.JPG
NSURL *path = [info objectForKey:@"PHImageFileURLKey"];
}
}];
}
PHImageManager.defaultManager().requestImageDataForAsset(asset, options: PHImageRequestOptions(), resultHandler:
{
(imagedata, dataUTI, orientation, info) in
if info!.keys.contains(NSString(string: "PHImageFileURLKey"))
{
let path = info![NSString(string: "PHImageFileURLKey")] as! NSURL
}
})
let fetchResult = PHAsset.fetchAssets(with: .image, options: nil)
if fetchResult.count > 0 {
if let asset = fetchResult.firstObject {
let date = asset.creationDate ?? Date()
print("Creation date: \(date)")
PHImageManager.default().requestImageData(for: asset, options: PHImageRequestOptions(),
resultHandler: { (imagedata, dataUTI, orientation, info) in
if let info = info {
if info.keys.contains(NSString(string: "PHImageFileURLKey")) {
if let path = info[NSString(string: "PHImageFileURLKey")] as? NSURL {
print(path)
}
}
}
})
}
}
如果您想获得像IMG_XXX.JPG这样的图像名称（例如照片中最后一张照片的名称），您可以尝试以下方法：
PHAsset *asset = nil;
PHFetchOptions *fetchOptions = [[PHFetchOptions alloc] init];
fetchOptions.sortDescriptors = @[[NSSortDescriptor sortDescriptorWithKey:@"creationDate" ascending:YES]];
PHFetchResult *fetchResult = [PHAsset fetchAssetsWithMediaType:PHAssetMediaTypeImage options:fetchOptions];
if (fetchResult != nil && fetchResult.count > 0) {
// get last photo from Photos
asset = [fetchResult lastObject];
}
if (asset) {
// get photo info from this asset
PHImageRequestOptions * imageRequestOptions = [[PHImageRequestOptions alloc] init];
imageRequestOptions.synchronous = YES;
[[PHImageManager defaultManager]
requestImageDataForAsset:asset
options:imageRequestOptions
resultHandler:^(NSData *imageData, NSString *dataUTI,
UIImageOrientation orientation,
NSDictionary *info)
{
NSLog(@"info = %@", info);
if ([info objectForKey:@"PHImageFileURLKey"]) {
// path looks like this -
// file:///var/mobile/Media/DCIM/###APPLE/IMG_####.JPG
NSURL *path = [info objectForKey:@"PHImageFileURLKey"];
}
}];
}
PHImageManager.defaultManager().requestImageDataForAsset(asset, options: PHImageRequestOptions(), resultHandler:
{
(imagedata, dataUTI, orientation, info) in
if info!.keys.contains(NSString(string: "PHImageFileURLKey"))
{
let path = info![NSString(string: "PHImageFileURLKey")] as! NSURL
}
})
let fetchResult = PHAsset.fetchAssets(with: .image, options: nil)
if fetchResult.count > 0 {
if let asset = fetchResult.firstObject {
let date = asset.creationDate ?? Date()
print("Creation date: \(date)")
PHImageManager.default().requestImageData(for: asset, options: PHImageRequestOptions(),
resultHandler: { (imagedata, dataUTI, orientation, info) in
if let info = info {
if info.keys.contains(NSString(string: "PHImageFileURLKey")) {
if let path = info[NSString(string: "PHImageFileURLKey")] as? NSURL {
print(path)
}
}
}
})
}
}
您真正需要的是localIdentifier，它是一个持久标识对象的唯一字符串 使用此字符串通过以下命令查找对象：
fetchAssetsWithLocalIdentifiers:options:、fetchassetcollectionswithlocalidentiers:options:、或fetchcollectionlistwithlocalidentiers:options:method.更多信息可用您真正需要的是localIdentifier，它是一个持续标识对象的唯一字符串 使用此字符串通过以下命令查找对象：
fetchAssetsWithLocalIdentifiers:options:、fetchassetcollectionswithlocalidentiers:options:、或fetchcollectionlistwithlocalidentiers:options:method.[asset valueForKey:@"filename"]
[asset valueForKey:@"filename"]
“合法性”由您决定。我知道问题已经得到了回答，但我想我会提供另一种选择：
extension PHAsset {
var originalFilename: String? {
var fname:String?
if #available(iOS 9.0, *) {
let resources = PHAssetResource.assetResources(for: self)
if let resource = resources.first {
fname = resource.originalFilename
}
}
if fname == nil {
// this is an undocumented workaround that works as of iOS 9.1
fname = self.value(forKey: "filename") as? String
}
return fname
}
}
我知道这个问题已经得到了回答，但我想我会提供另一个选择：
extension PHAsset {
var originalFilename: String? {
var fname:String?
if #available(iOS 9.0, *) {
let resources = PHAssetResource.assetResources(for: self)
if let resource = resources.first {
fname = resource.originalFilename
}
}
if fname == nil {
// this is an undocumented workaround that works as of iOS 9.1
fname = self.value(forKey: "filename") as? String
}
return fname
}
}
当您有资产的参考url时，使用Swift的最简单答案是：
if let asset = PHAsset.fetchAssetsWithALAssetURLs([referenceUrl], options: nil).firstObject as? PHAsset {
PHImageManager.defaultManager().requestImageDataForAsset(asset, options: nil, resultHandler: { _, _, _, info in
if let fileName = (info?["PHImageFileURLKey"] as? NSURL)?.lastPathComponent {
//do sth with file name
}
})
}
当您有资产的参考url时，使用Swift的最简单答案是：
if let asset = PHAsset.fetchAssetsWithALAssetURLs([referenceUrl], options: nil).firstObject as? PHAsset {
PHImageManager.defaultManager().requestImageDataForAsset(asset, options: nil, resultHandler: { _, _, _, info in
if let fileName = (info?["PHImageFileURLKey"] as? NSURL)?.lastPathComponent {
//do sth with file name
}
})
}
导入照片if let asset = PHAsset.fetchAssets(withALAssetURLs: [info[UIImagePickerControllerReferenceURL] as! URL],
options: nil).firstObject {
PHImageManager.default().requestImageData(for: asset, options: nil, resultHandler: { _, _, _, info in
if let fileName = (info?["PHImageFileURLKey"] as? NSURL)?.lastPathComponent {
print("///////" + fileName + "////////")
//do sth with file name
}
})
}
导入照片if let asset = PHAsset.fetchAssets(withALAssetURLs: [info[UIImagePickerControllerReferenceURL] as! URL],
options: nil).firstObject {
PHImageManager.default().requestImageData(for: asset, options: nil, resultHandler: { _, _, _, info in
if let fileName = (info?["PHImageFileURLKey"] as? NSURL)?.lastPathComponent {
print("///////" + fileName + "////////")
//do sth with file name
}
})
}
Swift 4中iOS 9+的最简单解决方案（基于skims答案）：
Swift 4中iOS 9+的最简单解决方案（基于skims答案）：
这只是肮脏的变通办法
PHImageFileURLKeyPHImageFileURLKeyPHAssetResourcePHAssetResourcefilenamefilename