我正在尝试使用以下代码获取我刚刚从相机捕获的图像的名称。但[info objectForKey:@"UIImagePickerControllerReferenceURL"]总是返回零。我怎样才能得到网址？
- (void)imagePickerController:(UIImagePickerController *)picker
didFinishPickingMediaWithInfo:(NSDictionary *)info {
self.myinfo = info;
NSLog(@"Dismissing camera ui...");
[self.cameraUI dismissViewControllerAnimated:YES completion:nil];
NSLog(@"Getting media url...");
NSString *mediaURL = [info objectForKey:UIImagePickerControllerMediaURL];
NSLog(@"Media url = %@", mediaURL);
NSLog(@"Getting media type...");
NSString *mediaType = [info objectForKey:UIImagePickerControllerMediaType];
NSLog(@"Selected mediaType: %@", mediaType);
if(mediaURL) {
NSLog(@"This is a video = %@", mediaURL);
if (![mediaType isEqualToString:(NSString*)kUTTypeVideo]) {
UISaveVideoAtPathToSavedPhotosAlbum(mediaURL, self, @selector(video:didFinishSavingWithError:contextInfo:), NULL);
}
} else {
NSLog(@"This is a photo...");
self.originalImage = (UIImage *) [info objectForKey:UIImagePickerControllerOriginalImage];
if (self.source == UIImagePickerControllerSourceTypeCamera && [mediaType isEqualToString:(NSString*)kUTTypeImage]) {
// Image captured from camera
NSLog(@"Saving new image...");
if (self.source != UIImagePickerControllerSourceTypePhotoLibrary) {
UIImageWriteToSavedPhotosAlbum(self.originalImage, self,
@selector(image:didFinishSavingWithError:usingContextInfo:), nil);
}
}
// Image selected from previous images.
else {
NSLog(@"Getting reference url...");
self.referenceURL = [info objectForKey:@"UIImagePickerControllerReferenceURL"];
NSLog(@"Reference url = %@", [self.referenceURL absoluteString]);
[self saveAssetData:self.originalImage :info];
}
}
}
- (void)image:(UIImage *)image
didFinishSavingWithError:(NSError *)error
usingContextInfo:(void*)ctxInfo {
if (error) {
NSLog(@"Resim kaydedilemedi: %@", [error localizedDescription]);
NSString *title = @"Resim kaydedilemedi!";
NSString* message = @"Resim kaydedilirken hata oluştu!";
[self alertStatus:message:title];
} else {
NSLog(@"Save asset data...");
[self saveAssetData:image :self.myinfo];
}
}
- (void)saveAssetData:(UIImage*)originalImage :(NSDictionary*)info {
self.assetLibrary = [[ALAssetsLibrary alloc] init];
NSURL *url = [info objectForKey:@"UIImagePickerControllerReferenceURL"];
ALAssetsLibraryAssetForURLResultBlock resultblock = ^(ALAsset *asset)
{
ALAssetRepresentation *assetRep = [asset defaultRepresentation];
NSString *filename = [assetRep filename];
NSLog(@"File name = %@", filename);
if(self.selectedMediaNames == nil)
self.selectedMediaNames = [[NSMutableArray alloc] init];
[self.selectedMediaNames addObject:filename];
[self.tableView reloadData];
[self.activitIndicator stopAnimating];
[self.activitIndicator setHidden:true];
HMXSharedDataManager *sharedDataManager =
[HMXSharedDataManager sharedManager];
[sharedDataManager.uploaMedias addObject:originalImage];
[sharedDataManager.uploaMediaNames addObject:filename];
};
ALAssetsLibraryAccessFailureBlock failureblock = ^(NSError *error)
{
NSLog(@"%@", error);
};
[self.assetLibrary assetForURL:url resultBlock:resultblock failureBlock:failureblock];
}
更新：
有点晚了，但在这里我如何获得图像或视频的名称：
- 检查
UIImagePickerControllerMediaURL，如果是null媒体是图像如果不是它是视频 - 如果图像或视频是刚刚拍摄或录制的，请将其保存到相册
- 用于
ALAssetsLibrary查询文件名。
这是保存和获取媒体的代码：
- (void)imagePickerController:(UIImagePickerController *)picker
didFinishPickingMediaWithInfo:(NSDictionary *)info {
@try {
[self.cameraUI dismissViewControllerAnimated:YES completion:nil];
mediaURL = [info objectForKey:UIImagePickerControllerMediaURL];
// If mediaURL is not null this should be a video
if(mediaURL) {
// This video is new just recorded with camera
if (self.source == UIImagePickerControllerSourceTypeCamera) {
// First save the video to photos album
ALAssetsLibrary *library = [ALAssetsLibrary new];
[library writeVideoAtPathToSavedPhotosAlbum:mediaURL completionBlock:^(NSURL *assetURL, NSError *error){
if (error) {
DDLogDebug(@"Failed to save the photo to photos album...");
} else {
// Get the name of the video
[self getMediaName:nil url:assetURL];
}
}];
} else { // This is a video that recorded before
// Get the name of the video
[self getMediaName:nil url:[info objectForKey:UIImagePickerControllerReferenceURL]];
}
}
// This is an image
else {
self.originalImage = (UIImage*)[info objectForKey:UIImagePickerControllerOriginalImage];
// This image is new just taken with camera
if (self.source == UIImagePickerControllerSourceTypeCamera) {
// First save the image to photos album
ALAssetsLibrary *library = [ALAssetsLibrary new];
[library writeImageToSavedPhotosAlbum:[self.originalImage CGImage]
orientation:(ALAssetOrientation)[self.originalImage imageOrientation]
completionBlock:^(NSURL *assetURL, NSError *error){
if (error) {
DDLogDebug(@"Failed to save the vide to photos album...");
} else {
// Get the name of the image
[self getMediaName:self.originalImage url:assetURL];
}
}];
} else { // This is an image that taken before
// Get the name of the image
[self getMediaName:self.originalImage
url:[info objectForKey:@"UIImagePickerControllerReferenceURL"]];
}
}
}
@catch (NSException *exception) {
DDLogError(@"%@", [exception description]);
}
}
获取媒体名称的实际方法：
- (void)getMediaName:(UIImage*)originalImage url:(NSURL*)url {
@try {
ALAssetsLibraryAssetForURLResultBlock resultblock = ^(ALAsset *asset) {
if (asset == nil) return;
ALAssetRepresentation *assetRep = [asset defaultRepresentation];
NSString *fileName = [assetRep filename];
// Do what you need with the file name here
};
ALAssetsLibraryAccessFailureBlock failureblock = ^(NSError *error) {
DDLogError(@"Failed to get image or video name : %@", error);
};
ALAssetsLibrary *library = [ALAssetsLibrary new];
[library assetForURL:url resultBlock:resultblock failureBlock:failureblock];
}
@catch (NSException *exception) {
DDLogError(@"%@", [exception description]);
}
}