將應用內視頻保存到相機膠捲？

Question

是否可以拍攝嵌入在應用程序中的視頻並將其保存到相機膠捲上？如果是這樣，怎麼樣？這是相同的UIWriteImage的東西？

Answer 1

你可以試試這個代碼假設你已經知道如何保存圖像：

-(void) imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info { 
NSString *mediaType = [info objectForKey:UIImagePickerControllerMediaType]; 
    if([mediaType isEqualToString:(NSString *)kUTTypeMovie]) { 
     //Save the video 
     NSURL *movieUrl = [info objectForKey:UIImagePickerControllerMediaURL]; 
     UISaveVideoAtPathToSavedPhotosAlbum([movieUrl relativePath], self,@selector(movie:didFinishSavingWithError:contextInfo:), nil); 
    } 
} 

或者你可以嘗試：

-(void) imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info { 
    if([mediaType isEqualToString:(NSString *)kUTTypeMovie]) { 
    NSURL *movieUrl = [info objectForKey:UIImagePickerControllerMediaURL]; 
    ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init]; 
    [library writeVideoAtPathToSavedPhotosAlbum:movieUrl completionBlock:^(NSURL *assetURL, NSError *error){ 
     if(error) { 
      NSLog(@"CameraViewController: Error on saving movie : %@ {imagePickerController}", error); 
     } 
     else { 
      NSLog(@"URL: %@", assetURL); 
     } 
    }]; 
    } 
} 

Answer 2

對於iOS 8或更高，使用PHPhotoLibrary。 ALAssetsLibrary已棄用。

包括：

@import PhotosUI; 

然後用它來保存您的電影：

[[PHPhotoLibrary sharedPhotoLibrary] performChanges:^ 
{ 
    [PHAssetChangeRequest creationRequestForAssetFromVideoAtFileURL:<%Your Movie URL%>]; 
} 
            completionHandler:^(BOOL success, NSError *error) 
{ 
    if (success) { 
     NSLog(@"Movie saved to camera roll."); 
    } 
    else { 
     NSLog(@"Could not save movie to camera roll. Error: %@", error); 
    } 
}];