Question

我正在尝试将所选图像保存到目录中。我的代码如下：

-(IBAction)attachPhotosButton
{
    UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];

    imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary; 

    [self presentModalViewController:imagePicker animated:YES];

    // If image is selected, then save
        //[self saveImage];
    // else do nothing
}


-(void)saveImage 
{
    // This creates a string with the path to the app's Documents Directory.
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0];

    // Here we are calling the method we created before to provide us with a unique file name.
    NSString *imagePath = [NSString stringWithFormat:@"%@/iPhoneImage.png", documentsDirectory];

    // This creates PNG NSData for the UIImageView imageView's image.
    UIImageView *imageView;
    NSData *imageData = UIImagePNGRepresentation(imageView.image);

    // Uncomment the line below to view the image's file path in the Debugger Console. (Command+Shift+R)
    NSLog(@"Image Directory: %@", imagePath);

    // This actually creates the image at the file path specified, with the image's NSData.
    [[NSFileManager defaultManager] createFileAtPath:imagePath contents:imageData attributes:nil];
}

如何在显示imagePicker视图控制器时检测到用户选择了图像？

如果他们选择了我想调用saveImage方法的图像。

此致斯蒂芬

Answer 1

您需要访问UIImagePickerControllerDelegate方法。该链接将您带到您想要的那个。确保设置了选择器委托！

在方法内部，您只需要检查信息字典的UIImagePickerControllerMediaType键是否设置为kUTTypeImage。然后打电话给你的功能。

Answer 2

中的

-(void) imagePickerController:(UIImagePickerController *)picker 
        didFinishPickingMediaWithInfo:(NSDictionary *)info

UIImagePickerControllerDelegate的委托方法。

编辑：重新阅读您的问题并意识到您希望保存到临时路径或某个地方，而不是手机的相册。

UIImagePickerController - 保存选定的图像

2 个答案: