iphone - 如何保存 UIImagePickerView Controller 返回的图像

Question

我有一个应用程序，用户将从 UIImagePickerView 中选择图像。

从中选择图像后，我想将其保存在我的应用程序中。

如何实现这一目标？

预先感谢您对我的帮助。

Answer 1

假设您使用的是 SDK 3.0，以下是一些将图像保存到应用程序的文档文件夹中的代码:

-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{   
    // Dismiss the picker
    [[picker parentViewController] dismissModalViewControllerAnimated:YES];

    // Get the image from the result
    UIImage* image = [info valueForKey:@"UIImagePickerControllerOriginalImage"];

    // Get the data for the image as a PNG
    NSData* imageData = UIImagePNGRepresentation(image);

    // Give a name to the file
    NSString* imageName = "MyImage.png";

    // Now, we have to find the documents directory so we can save it
    // Note that you might want to save it elsewhere, like the cache directory,
    // or something similar.
    NSArray* paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString* documentsDirectory = [paths objectAtIndex:0];

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

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

    return;
}