我开发了一款应用程序,用于从手机摄像头拍摄照片。但是现在我需要将图像存储到手机存储器中,然后存储到我创建的文件夹中。
我试过这个:
var filename = Titanium.Filesystem.resourcesDirectory + "/newImageFile.jpg";
var imageFile = Titanium.Filesystem.getFile(filename);
imageFile.write(capturedImg);
但它并没有在画廊中出现。如何将图像存储到手机存储器中?如何在手机存储器中创建服装文件夹以存储图像?
答案 0 :(得分:0)
这将创建相册并保存到此相册中。
我想出了这个单例类来处理它:
import Photos
class CustomPhotoAlbum {
static let albumName = "Titanium"
static let sharedInstance = CustomPhotoAlbum()
var assetCollection: PHAssetCollection!
init() {
func fetchAssetCollectionForAlbum() -> PHAssetCollection! {
let fetchOptions = PHFetchOptions()
fetchOptions.predicate = NSPredicate(format: "title = %@", CustomPhotoAlbum.albumName)
let collection = PHAssetCollection.fetchAssetCollectionsWithType(.Album, subtype: .Any, options: fetchOptions)
if let firstObject: AnyObject = collection.firstObject {
return collection.firstObject as! PHAssetCollection
}
return nil
}
if let assetCollection = fetchAssetCollectionForAlbum() {
self.assetCollection = assetCollection
return
}
PHPhotoLibrary.sharedPhotoLibrary().performChanges({
PHAssetCollectionChangeRequest.creationRequestForAssetCollectionWithTitle(CustomPhotoAlbum.albumName)
}) { success, _ in
if success {
self.assetCollection = fetchAssetCollectionForAlbum()
}
}
}
func saveImage(image: UIImage) {
if assetCollection == nil {
return // If there was an error upstream, skip the save.
}
PHPhotoLibrary.sharedPhotoLibrary().performChanges({
let assetChangeRequest = PHAssetChangeRequest.creationRequestForAssetFromImage(image)
let assetPlaceholder = assetChangeRequest.placeholderForCreatedAsset
let albumChangeRequest = PHAssetCollectionChangeRequest(forAssetCollection: self.assetCollection)
albumChangeRequest.addAssets([assetPlaceholder])
}, completionHandler: nil)
}
}
首次实例化该类时,如果自定义相册尚不存在,则会创建该相册。您可以保存这样的图像:
CustomPhotoAlbum.sharedInstance.saveImage(image)
注意:CustomPhotoAlbum类假定应用已拥有访问照片库的权限。处理权限有点超出了这个问题/答案的范围。 因此,请在使用之前确保PHPhotoLibrary.authorizationStatus()== .Authorize。并在必要时请求授权。
答案 1 :(得分:0)
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info
{
NSData *imageData = [info objectForKey:UIImagePickerControllerOriginalImage];
if(picker.sourceType==UIImagePickerControllerSourceTypeCamera)
{
//to save camera roll
[[PHPhotoLibrary sharedPhotoLibrary] performChanges:^{
[PHAssetChangeRequest creationRequestForAssetFromImage:image];
} completionHandler:nil];
}
}
这将保存您拍摄的相机胶卷中的图像