iphone – 从照片库中选择多个图像

好的，我有这个想法。资产库的问题在于它为您提供了图像的所有GEO数据。对于使用您的应用程序的用户来说，这意味着他们会立即提示您的应用正在尝试访问其位置。实际上你想要做的就是让他们从他们的相册中选择多个图像。大多数用户将被视为盗版问题。最好的方法是使用imagePickerController的apple API。我知道它可以让您一次选择一个图片，但如果您添加以下代码，它将允许您选择多个图片。

我正在做的是让用户继续选择他们想要的照片，将这些文件保存在应用程序文档目录中，直到他们点击完成按钮。看到这里我的示例代码，希望它会为您节省经历资产库的痛苦

-(IBAction)selectExitingPicture
{
    //Specially for fing iPAD
    UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];
    imagePicker.delegate = self;
    imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
    imagePicker.mediaTypes = [NSArray arrayWithObject:(NSString *)kUTTypeImage];

    popoverController = [[UIPopoverController alloc] initWithContentViewController:imagePicker];
    [popoverController presentPopoverFromRect:CGRectMake(0.0,0.0,400.0,300.0) 
                             inView:self.view
           permittedArrowDirections:UIPopoverArrowDirectionAny 
                           animated:YES];
}

//Done button on top
- (void)navigationController:(UINavigationController *)navigationController
      willShowViewController:(UIViewController *)viewController
                    animated:(BOOL)animated
{    
    //NSLog(@"Inside navigationController ...");


    if (!doneButton) 
    {
        doneButton = [[UIBarButtonItem alloc] initWithTitle:@"Done"
                                                      style:UIBarButtonItemStyleDone
                                                     target:self action:@selector(saveImagesDone:)];
    }

    viewController.navigationItem.rightBarButtonItem = doneButton;
}

- (IBAction)saveImagesDone:(id)sender
{
    //NSLog(@"saveImagesDone ...");

    [popoverController dismissPopoverAnimated:YES];
}


-(void)imagePickerController:(UIImagePickerController *)picker
      didFinishPickingImage : (UIImage *)image
                 editingInfo:(NSDictionary *)editingInfo
{


    //DONT DISMISS
    //[picker dismissModalViewControllerAnimated:YES];
    //[popoverController dismissPopoverAnimated:YES];

        IMAGE_COUNTER = IMAGE_COUNTER + 1;

        imageView.image = image;

        // Get the data for the image
        NSData* imageData = UIImageJPEGRepresentation(image,1.0);


        // Give a name to the file
        NSString* incrementedImgStr = [NSString stringWithFormat: @"UserCustomPotraitPic%d.jpg",IMAGE_COUNTER];


        NSArray* paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES);
        NSString* documentsDirectory = [paths objectAtIndex:0];

        // Now we get the full path to the file
        NSString* fullPathToFile2 = [documentsDirectory stringByAppendingPathComponent:incrementedImgStr];

        // and then we write it out
        [imageData writeToFile:fullPathToFile2 atomically:NO];

}

//现在使用此代码获取用户选择的图片。在你的代码中从任何你想要的地方调用它

NSArray* paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,YES);
        NSString* documentsPath = [paths objectAtIndex:0];
        NSString* dataFile = [documentsPath stringByAppendingPathComponent:@"UserCustomPotraitPic1.jpg"];

        NSData *potraitImgData = [NSData dataWithContentsOfFile:dataFile];
        backgroundImagePotrait = [UIImage imageWithData:potraitImgData];