如何从照片库加载照片并将其存储到应用程序项目中？ [英] How to load photos from photo gallery and store it into application project?

问题描述

我正在开发一个与我在这里找到的示例代码几乎相同的应用程序。但我想做的方法与示例代码不同。

链接： PhotoLocations

I'm working on an application that is almost the same as the sample codes i found here. But the method i want to do is different from the sample codes.
Link: PhotoLocations

第一个屏幕将有一个ImageView和2个按钮（选择照片，确认）。
当点击选择照片按钮时，它将导航到另一个屏幕，该屏幕从iPad的照片库中检索照片。选择照片后，它将关闭当前屏幕并返回到在ImageView上显示所选照片的​​第一个屏幕。

The first screen will have an ImageView and 2 buttons (Choose Photo, Confirm). When the 'Choose Photo' button is tapped, it will navigate to another screen which retrieves photos from my iPad's photo gallery. When a photo is chosen, it will dismiss the current screen and return to the first screen displaying the chosen photo on the ImageView.

点击确认按钮后，照片将存储到我的应用程序项目中（例如/resources/images/photo.jpg）。

When the 'Confirm' button is tapped, the photo will be stored into my application's project (e.g. /resources/images/photo.jpg).

我可以知道我该怎么办？

May i know how can i do this?

推荐答案

这个将带您到图库，您可以选择图像。

This will take you to the image gallery and you can select the image.

UIImagePickerController *imagePickerController = [[UIImagePickerController alloc]init];
imagePickerController.delegate = self;
imagePickerController.sourceType =  UIImagePickerControllerSourceTypePhotoLibrary;
[self presentViewController:imagePickerController animated:YES completion:nil];

这将帮助您选择图像

- (void)imagePickerController:(UIImagePickerController *)picker 
    didFinishPickingImage:(UIImage *)image
              editingInfo:(NSDictionary *)editingInfo
{
    // Dismiss the image selection, hide the picker and

    //show the image view with the picked image

    [picker dismissViewControllerAnimated:YES completion:nil];
    //UIImage *newImage = image;
}

然后你可以将这张图片存储到文件目录......

And then you can store this image to the documents directory...

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,     NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *savedImagePath = [documentsDirectory stringByAppendingPathComponent:@"savedImage.png"];
UIImage *image = imageView.image; // imageView is my image from camera
NSData *imageData = UIImagePNGRepresentation(image);
[imageData writeToFile:savedImagePath atomically:NO];

点击图片自己使用

- (IBAction) takePhoto:(id) sender
{
    UIImagePickerController *imagePickerController = [[UIImagePickerController alloc] init];

    imagePickerController.delegate = self;
    imagePickerController.sourceType =  UIImagePickerControllerSourceTypeCamera;

    [self presentModalViewController:imagePickerController animated:YES];
}

这篇关于如何从照片库加载照片并将其存储到应用程序项目中？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！