UIImagePickerController允许我拍摄照片和视频，但不允许我保存或“使用”它们

Question

我正在开发一个简单的照片和视频捕获应用程序。该应用程序成功允许用户按下按钮即可拍摄照片或视频。但是，一旦完成拍摄照片或视频，它会提供2个选项：“重新拍摄”和“使用照片”或“使用视频”，具体取决于您使用的是哪个。

如果用户点击“重新拍摄”，则只是让他们重新拍摄新照片或视频，但是当用户点击“使用照片”或“使用视频”时，它什么也不做。该应用程序仅将它们带回主应用程序屏幕。

我对如何访问“使用照片” /“使用视频”按钮感到困惑，以便我可以编辑它的代码并将其保存到相机胶卷中。

这是我到目前为止的代码：

ViewController.h：

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController <UINavigationControllerDelegate, UIImagePickerControllerDelegate>

@property UIImagePickerController * pickerController;

-(IBAction)showCameraUI;

@end

ViewController.m：

#import "ViewController.h"


@interface ViewController () <UINavigationControllerDelegate, UIImagePickerControllerDelegate>

@end

@implementation ViewController

- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.

[UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera];
[UIImagePickerController availableMediaTypesForSourceType:UIImagePickerControllerSourceTypeCamera];

NSLog(@"%ld", (long)UIImagePickerControllerSourceTypeCamera); }

- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}

-(IBAction)showCameraUI{

UIImagePickerController * pickerController = [[UIImagePickerController alloc]init];

pickerController.mediaTypes = [UIImagePickerController  availableMediaTypesForSourceType:UIImagePickerControllerSourceTypeCamera];

pickerController.sourceType = UIImagePickerControllerSourceTypeCamera;


[self presentViewController:pickerController animated:YES completion:NULL];

}

@end

Answer 1

您可以使用的didFinishPickingMediaWithInfo委托UIImagePickerController来保存图像。

为此，您需要这样做：

-(IBAction)showCameraUI
{
    UIImagePickerController * pickerController = [[UIImagePickerController alloc]init];
    pickerController.mediaTypes = [UIImagePickerController availableMediaTypesForSourceType:UIImagePickerControllerSourceTypeCamera];
    pickerController.sourceType = UIImagePickerControllerSourceTypeCamera;
    pickerController.delegate = self;
    [self presentViewController:pickerController animated:YES completion:NULL];

}

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
   // save photo
    NSString *mediaType = [info objectForKey:UIImagePickerControllerMediaType];
   if ([mediaType isEqualToString:(NSString *)kUTTypeImage])
   {
       UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];
       UIImageWriteToSavedPhotosAlbum(image,nil,nil,nil);
   }
   [picker dismissModalViewControllerAnimated:YES];
}