'Unsupported predicate in fetch options: title == "Test"' 在 osx
'Unsupported predicate in fetch options: title == "Test"' in osx
我目前正在开发一个应用程序,我需要在其中显示本地存储在每个相册 phone 上的图像。我设法显示了所有专辑名称,现在选择专辑时,我想显示图像。
func getLocalAlbums() {
var albums: [AlbumModel] = [AlbumModel]()
albumNamesDevice.removeAll()
let options = PHFetchOptions()
let topLvlOptions = PHFetchOptions()
let userAlbums = PHAssetCollection.fetchAssetCollectionsWithType(.SmartAlbum, subtype: .SmartAlbumUserLibrary, options: options)
let topLvlCollection = PHCollectionList.fetchTopLevelUserCollectionsWithOptions(topLvlOptions)
let allAlbums = [topLvlCollection, userAlbums]
for i in 0 ..< allAlbums.count {
let result = allAlbums[i]
result.enumerateObjectsUsingBlock { (asset, index, stop) in
if asset is PHAssetCollection {
let ass: PHAssetCollection = asset as! PHAssetCollection
let fetchOptions = PHFetchOptions()
fetchOptions.predicate = NSPredicate(format: "mediaType = %d", PHAssetMediaType.Image.rawValue)
let newAlbum = AlbumModel(name: ass.localizedTitle!, count: ass.estimatedAssetCount, collection: ass)
albums.append(newAlbum)
}
}
}
for item in albums {
self.albumNamesDevice.append(item.name)
}
}
func getAssetsFromAlbum(albumName: String) -> [PHAsset] {
let options = PHFetchOptions()
// Bug from Apple since 9.1, use workaround
options.predicate = NSPredicate(format: "title = %@", albumName)
options.sortDescriptors = [ NSSortDescriptor(key: "creationDate", ascending: true) ]
let results = PHAsset.fetchAssetsWithMediaType(.Image, options: options)
var assets = [PHAsset]()
results.enumerateObjectsUsingBlock { (obj, index, stop) in
if let asset = obj as? PHAsset {
assets.append(asset)
}
}
return assets
}
问题出在以下行:
options.predicate = NSPredicate(format: "title = %@", albumName)
我一直收到错误消息:
Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Unsupported predicate in fetch options: title == "Test"'
我听说这是 2014 年的一个错误,但苹果开发人员怎么还没有解决这个问题?
有人知道解决这个问题的方法吗?
最终我找到了答案,或者至少找到了解决方法
func getAssetsFromAlbum(albumName: String) -> [PHAsset] {
let options = PHFetchOptions()
// Bug from Apple since 9.1, use workaround
//options.predicate = NSPredicate(format: "title = %@", albumName)
options.sortDescriptors = [ NSSortDescriptor(key: "creationDate", ascending: true) ]
let collection: PHFetchResult = PHAssetCollection.fetchAssetCollectionsWithType(.Album, subtype: .Any, options: nil)
for k in 0 ..< collection.count {
let obj:AnyObject! = collection.objectAtIndex(k)
if obj.title == albumName {
if let assCollection = obj as? PHAssetCollection {
let results = PHAsset.fetchAssetsInAssetCollection(assCollection, options: options)
var assets = [PHAsset]()
results.enumerateObjectsUsingBlock { (obj, index, stop) in
if let asset = obj as? PHAsset {
assets.append(asset)
}
}
return assets
}
}
}
return [PHAsset]()
}
我目前正在开发一个应用程序,我需要在其中显示本地存储在每个相册 phone 上的图像。我设法显示了所有专辑名称,现在选择专辑时,我想显示图像。
func getLocalAlbums() {
var albums: [AlbumModel] = [AlbumModel]()
albumNamesDevice.removeAll()
let options = PHFetchOptions()
let topLvlOptions = PHFetchOptions()
let userAlbums = PHAssetCollection.fetchAssetCollectionsWithType(.SmartAlbum, subtype: .SmartAlbumUserLibrary, options: options)
let topLvlCollection = PHCollectionList.fetchTopLevelUserCollectionsWithOptions(topLvlOptions)
let allAlbums = [topLvlCollection, userAlbums]
for i in 0 ..< allAlbums.count {
let result = allAlbums[i]
result.enumerateObjectsUsingBlock { (asset, index, stop) in
if asset is PHAssetCollection {
let ass: PHAssetCollection = asset as! PHAssetCollection
let fetchOptions = PHFetchOptions()
fetchOptions.predicate = NSPredicate(format: "mediaType = %d", PHAssetMediaType.Image.rawValue)
let newAlbum = AlbumModel(name: ass.localizedTitle!, count: ass.estimatedAssetCount, collection: ass)
albums.append(newAlbum)
}
}
}
for item in albums {
self.albumNamesDevice.append(item.name)
}
}
func getAssetsFromAlbum(albumName: String) -> [PHAsset] {
let options = PHFetchOptions()
// Bug from Apple since 9.1, use workaround
options.predicate = NSPredicate(format: "title = %@", albumName)
options.sortDescriptors = [ NSSortDescriptor(key: "creationDate", ascending: true) ]
let results = PHAsset.fetchAssetsWithMediaType(.Image, options: options)
var assets = [PHAsset]()
results.enumerateObjectsUsingBlock { (obj, index, stop) in
if let asset = obj as? PHAsset {
assets.append(asset)
}
}
return assets
}
问题出在以下行:
options.predicate = NSPredicate(format: "title = %@", albumName)
我一直收到错误消息:
Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Unsupported predicate in fetch options: title == "Test"'
我听说这是 2014 年的一个错误,但苹果开发人员怎么还没有解决这个问题?
有人知道解决这个问题的方法吗?
最终我找到了答案,或者至少找到了解决方法
func getAssetsFromAlbum(albumName: String) -> [PHAsset] {
let options = PHFetchOptions()
// Bug from Apple since 9.1, use workaround
//options.predicate = NSPredicate(format: "title = %@", albumName)
options.sortDescriptors = [ NSSortDescriptor(key: "creationDate", ascending: true) ]
let collection: PHFetchResult = PHAssetCollection.fetchAssetCollectionsWithType(.Album, subtype: .Any, options: nil)
for k in 0 ..< collection.count {
let obj:AnyObject! = collection.objectAtIndex(k)
if obj.title == albumName {
if let assCollection = obj as? PHAssetCollection {
let results = PHAsset.fetchAssetsInAssetCollection(assCollection, options: options)
var assets = [PHAsset]()
results.enumerateObjectsUsingBlock { (obj, index, stop) in
if let asset = obj as? PHAsset {
assets.append(asset)
}
}
return assets
}
}
}
return [PHAsset]()
}