iOS7 : What is the best way to give the user the ability to choose between taking a photo and going to a photo gallery?

Question

当用户单击某个按钮时，我希望他能够在拍照和从图库中选择图片之间进行选择。截至目前，它似乎是其中之一。我应该为此创建两个按钮还是有更好的方法来完成这个？我希望有一种点击按钮的方式，iOS 将在 native 为用户提供选择。

   -(IBAction)takePhoto:(id)sender

   {
UIImagePickerController *imagePickerController = [[UIImagePickerController alloc] init];

if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera])
{
    imagePickerController = [[UIImagePickerController alloc] init];
     imagePickerController.delegate = self;
    imagePickerController.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
}

// image picker needs a delegate,
[imagePickerController setDelegate:self];

// Place image picker on the screen
[self presentModalViewController:imagePickerController animated:YES];
 }

Answer 1

在我看来，最好的方法是创建例如 2 个按钮

• UIBarButtonItem * choosePhotoBtn
• UIBarButtonItem * TakePhotoBtn

然后在按下任一按钮时调用相同的 IBAction，并在其中添加条件以调用适当的接口(interface)，如下所示:

-(IBAction) getPhoto:(id) sender {
    UIImagePickerController * picker = [[UIImagePickerController alloc] init];
    picker.delegate = self;

    if((UIBarButtonItem *) sender == choosePhotoBtn) {
        picker.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;
    } else {
        picker.sourceType = UIImagePickerControllerSourceTypeCamera;
    }
    [self presentViewController:picker animated:YES completion:nil];
}

---

But these are the best options, I like the UIAlertView the most to be honest

老实说，这对用户来说是更多的点击次数，但这也是我的看法。 以下是您可以如何做到这一点，创建您的 UIAlertView ，然后在其委托(delegate)方法中放置一个条件:

-(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{
    NSString *BtnSelected = [alertView buttonTitleAtIndex:buttonIndex];

    if([BtnSelected isEqualToString:@"choosePhotoBtn"] {
        picker.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;
    } else {
        picker.sourceType = UIImagePickerControllerSourceTypeCamera;
    }
    [self presentViewController:picker animated:YES completion:nil];

}