以下代码加载也位于iCloud或流图像上的图像。我们如何将搜索限制为仅限于相机胶卷中的图像？
var assets = PHAsset.fetchAssetsWithMediaType(PHAssetMediaType.Image, options: nil)
答案 0 :(得分：19)
在添加了相机胶卷和照片流专辑后，Apple在iOS 8.1中添加了以下PHAssetCollectionSubtype类型：
PHAssetCollectionSubtypeAlbumMyPhotoStream（与PHAssetCollectionTypeAlbum一起） - 获取Photo Stream相册。
PHAssetCollectionSubtypeSmartAlbumUserLibrary（与PHAssetCollectionTypeSmartAlbum一起） - 获取相机胶卷相册。
Haven未测试它是否与iOS 8.0.x向后兼容。
答案 1 :(得分：5)
通过一些实验，我们发现了一个未在文档中列出的隐藏属性（assetSource）。基本上你必须做一个常规的提取请求，然后使用谓词来过滤相机胶卷中的谓词。该值应为3。
示例代码：
//fetch all assets, then sub fetch only the range we need
var assets = PHAsset.fetchAssetsWithMediaType(PHAssetMediaType.Image, options: fetchOptions)
assets.enumerateObjectsUsingBlock { (obj, idx, bool) -> Void in
results.addObject(obj)
}
var cameraRollAssets = results.filteredArrayUsingPredicate(NSPredicate(format: "assetSource == %@", argumentArray: [3]))
results = NSMutableArray(array: cameraRollAssets)
答案 2 :(得分：4)
如果您正在寻找像我这样的Objective C代码，并且您没有得到新库/ Photo Framework的答案，因为您已经弃用了AssetsLibrary的代码，那么这将帮助您： 的夫特
全局变量：
var imageArray: [AnyObject]
var mutableArray: [AnyObject]
convenience func getAllPhotosFromCamera() {
imageArray = [AnyObject]()
mutableArray = [AnyObject]()
var requestOptions: PHImageRequestOptions = PHImageRequestOptions()
requestOptions.resizeMode = .Exact
requestOptions.deliveryMode = .HighQualityFormat
requestOptions.synchronous = true
var result: PHFetchResult = PHAsset.fetchAssetsWithMediaType(.Image, options: nil)
NSLog("%d", Int(result.count))
var manager: PHImageManager = PHImageManager.defaultManager()
var images: [AnyObject] = [AnyObject](minimumCapacity: result.count)
// assets contains PHAsset objects.
var ima: UIImage
for asset: PHAsset in result {
// Do something with the asset
manager.requestImageForAsset(asset, targetSize: PHImageManagerMaximumSize, contentMode: .Default, options: requestOptions, resultHandler: {(image: UIImage, info: [NSObject : AnyObject]) -> void in
目标C
全局变量：
NSArray *imageArray;
NSMutableArray *mutableArray;
以下方法将帮助您：
-(void)getAllPhotosFromCamera
{
imageArray=[[NSArray alloc] init];
mutableArray =[[NSMutableArray alloc]init];
PHImageRequestOptions *requestOptions = [[PHImageRequestOptions alloc] init];
requestOptions.resizeMode = PHImageRequestOptionsResizeModeExact;
requestOptions.deliveryMode = PHImageRequestOptionsDeliveryModeHighQualityFormat;
requestOptions.synchronous = true;
PHFetchResult *result = [PHAsset fetchAssetsWithMediaType:PHAssetMediaTypeImage options:nil];
NSLog(@"%d",(int)result.count);
PHImageManager *manager = [PHImageManager defaultManager];
NSMutableArray *images = [NSMutableArray arrayWithCapacity:[result count]];
// assets contains PHAsset objects.
__block UIImage *ima;
for (PHAsset *asset in result) {
// Do something with the asset
[manager requestImageForAsset:asset
targetSize:PHImageManagerMaximumSize
contentMode:PHImageContentModeDefault
options:requestOptions
resultHandler:^void(UIImage *image, NSDictionary *info) {
ima = image;
[images addObject:ima];
}];
}
imageArray = [images copy]; // You can direct use NSMutuable Array images
}
答案 3 :(得分：4)
如果您使用自己的PHCachingImageManager而不是共享的PHImageManager实例，那么当您致电requestImageForAsset:targetSize:contentMode:options:resultHandler:时，您可以在PHImageRequestOptions中设置一个选项，以指定该图片是本地的
<强> networkAccessAllowed 属性
一个布尔值，指定Photos是否可以从iCloud下载所请求的图像。
<强> networkAccessAllowed
讨论
如果是，并且所请求的图像未存储在本地设备上，则照片会从iCloud下载图像。要获得下载进度的通知，请使用progressHandler属性在下载映像时定期提供Photos调用的块。如果为NO（默认值），并且图像不在本地设备上，则结果处理程序的信息字典中的PHImageResultIsInCloudKey值表示除非您启用网络访问，否则该图像不可用。
答案 4 :(得分：3)
这可以提供帮助。您可以使用自己的数据模型而不是我使用的AlbumModel。
func getCameraRoll() -> AlbumModel {
var cameraRollAlbum : AlbumModel!
let cameraRoll = PHAssetCollection.fetchAssetCollections(with: .smartAlbum, subtype: .smartAlbumUserLibrary, options: nil)
cameraRoll.enumerateObjects({ (object: AnyObject!, count: Int, stop: UnsafeMutablePointer) in
if object is PHAssetCollection {
let obj:PHAssetCollection = object as! PHAssetCollection
let fetchOptions = PHFetchOptions()
fetchOptions.sortDescriptors = [NSSortDescriptor(key: "creationDate", ascending: false)]
fetchOptions.predicate = NSPredicate(format: "mediaType = %d", PHAssetMediaType.image.rawValue)
let assets = PHAsset.fetchAssets(in: obj, options: fetchOptions)
if assets.count > 0 {
let newAlbum = AlbumModel(name: obj.localizedTitle!, count: assets.count, collection:obj, assets: assets)
cameraRollAlbum = newAlbum
}
}
})
return cameraRollAlbum
}
答案 5 :(得分：0)
这是由apple提供的Objective-c版本。
-(NSMutableArray *)getNumberOfPhotoFromCameraRoll:(NSArray *)array{
PHFetchResult *fetchResult = array[1];
int index = 0;
unsigned long pictures = 0;
for(int i = 0; i < fetchResult.count; i++){
unsigned long temp = 0;
temp = [PHAsset fetchAssetsInAssetCollection:fetchResult[i] options:nil].count;
if(temp > pictures ){
pictures = temp;
index = i;
}
}
PHCollection *collection = fetchResult[index];
if (![collection isKindOfClass:[PHAssetCollection class]]) {
// return;
}
// Configure the AAPLAssetGridViewController with the asset collection.
PHAssetCollection *assetCollection = (PHAssetCollection *)collection;
PHFetchResult *assetsFetchResult = [PHAsset fetchAssetsInAssetCollection:assetCollection options:nil];
self. assetsFetchResults = assetsFetchResult;
self. assetCollection = assetCollection;
self.numberOfPhotoArray = [NSMutableArray array];
for (int i = 0; i<[assetsFetchResult count]; i++) {
PHAsset *asset = assetsFetchResult[i];
[self.numberOfPhotoArray addObject:asset];
}
NSLog(@"%lu",(unsigned long)[self.numberOfPhotoArray count]);
return self.numberOfPhotoArray;
}
您可以在哪里获取以下详细信息
PHFetchResult *fetchResult = self.sectionFetchResults[1];
PHCollection *collection = fetchResult[6];
**value 1,6 used to get camera images**
**value 1,0 used to get screen shots**
**value 1,1 used to get hidden**
**value 1,2 used to get selfies**
**value 1,3 used to get recently added**
**value 1,4 used to get videos**
**value 1,5 used to get recently deleted**
**value 1,7 used to get favorites**
Apple演示link
声明你的财产
@property (nonatomic, strong) NSArray *sectionFetchResults;
@property (nonatomic, strong) PHFetchResult *assetsFetchResults;
@property (nonatomic, strong) PHAssetCollection *assetCollection;
@property (nonatomic, strong) NSMutableArray *numberOfPhotoArray;
答案 6 :(得分：0)
我也一直在敲打这个。我发现无法仅使用fetchAssetsWithMediaType或fetchAssetsInAssetCollection过滤设备上的资产。我能够使用requestContentEditingInputWithOptions或requestImageDataForAsset来确定资产是否在设备上，但这是异步的，似乎它使用了太多资源来为列表中的每个资产做。必须有更好的方法。
PHFetchResult *fetchResult = [PHAsset fetchAssetsWithMediaType:PHAssetMediaTypeImage options:nil];
for (int i=0; i<[fetchResult count]; i++) {
PHAsset *asset = fetchResult[i];
[asset requestContentEditingInputWithOptions:nil
completionHandler:^(PHContentEditingInput *contentEditingInput, NSDictionary *info) {
if ([[info objectForKey:PHContentEditingInputResultIsInCloudKey] intValue] == 1) {
NSLog(@"asset is in cloud");
} else {
NSLog(@"asset is on device");
}
}];
}
答案 7 :(得分：-1)
如果您不想依赖未记录的API，请查看[asset canPerformEditOperation:PHAssetEditOperationContent]。如果设备上有完整的原始文件，则仅返回true。
不可否认，这也很脆弱，但测试表明它适用于所有的assetSource类型（照片流，iTunes同步等）。