ios - 获取 PHAssetSource IOS 8

Question

在 iOS 9 的 PhotoFramework 中，它们有一个方便的源类型结构。

是否有办法在 IOS 8 上识别 Assets 源类型？

typedef NS_OPTIONS(NSUInteger, PHAssetSourceType) {
 PHAssetSourceTypeNone            = 0,
 PHAssetSourceTypeUserLibrary     = (1UL << 0),
 PHAssetSourceTypeCloudShared     = (1UL << 1),
 PHAssetSourceTypeiTunesSynced    = (1UL << 2),
} NS_AVAILABLE_IOS(9_0);

Answer 1

检查这段代码。如果您在不让它使用网络访问的情况下请求图像，如果图像在云端，它将返回 nil。

PHFetchOptions* fetchOptions = [[PHFetchOptions alloc] init];
            PHFetchResult *allPhotosResult = [PHAsset fetchAssetsWithMediaType:PHAssetMediaTypeImage options: fetchOptions];

            //   Get assets from the PHFetchResult object
            [allPhotosResult enumerateObjectsUsingBlock:^(PHAsset *asset, NSUInteger idx, BOOL *stop) {
                //NSLog(@"asset %@", asset);
                PHImageRequestOptions* options = [[PHImageRequestOptions alloc] init];
                options.allowNetworkAccess = NO; // <<<< don't allow network access to determine if it's in the cloud or not
                options.synchronous = YES; // depends on your situation
                options.deliveryMode = PHImageRequestOptionsDeliveryModeFastFormat; 
[imageManager requestImageDataForAsset: asset options: options resultHandler:^(NSData *imageData, NSString *dataUTI, UIImageOrientation orientation, NSDictionary *info) {

// if imageData is nil then it's not on the device, likely in the cloud, otherwise it's local

}