识别UIImagePickerController代理中的不同选择器 [英] Identifying different pickers in UIImagePickerController delegate

问题描述

我有一个视图，有几个按钮，我用来呈现UIImagePickerController（相机和媒体选择器）。当我创建UIImagePickerController时，我给他们不同的名字，并给出它们的模态，如下面的代码所示：

   - （ void）startMediaBrowserFromViewControllerForBGImage {
 UIImagePickerController * mediaUIForBGImage = [[UIImagePickerController alloc] init]; 
 //我也在这里设置了一堆不同的设置，但这并不重要
 mediaUIForBGImage.delegate = self; 
 [self presentModalViewController：mediaUIForBGImage animated：YES]; 
} 
  

现在，您还可以在代码中看到，我将委托设置为 self ，这就是我所做的所有的UIImagePickerController，但问题是 - 在委托方法中，我如何知道哪个UIImagePickerController称为委托方法。因为每个UIImagePickerControllers需要采取的媒体行动是不同的。在委托方法中，我得到 UIImagePickerController 参数，但它始终具有从方法（选择器）分配的名称。我可以使用哪些UIImagePickerController来引用？

解决方案

我想你可以存储对每个选择器的引用，然后检查如果是同一个实例。虽然我会质疑使用多个不同的选择器实例，但是您可以配置一个单一的实例吗？此外，它们在任何配置中返回几乎相同的结果，您可以针对特定需求调查结果字典。

  self.oneImagePicker = [UIImagePickerController ...] 
 self.twoImagePicker = [UIImagePickerController ...] 
 
 //在委托
 if（[self.oneImagePicker isEqual：picker]）... 
  

I have a view with a couple of buttons whick I use to present UIImagePickerControllers (both camera and media pickers). When I create the UIImagePickerControllers, I give them diffrent names and present them modaly as you can see in the code below:

- (void) startMediaBrowserFromViewControllerForBGImage {
    UIImagePickerController * mediaUIForBGImage = [[UIImagePickerController alloc]init];
    //i also set a bunch of different settings here, but it doesn't matter for this purpose
    mediaUIForBGImage.delegate = self;
    [self presentModalViewController: mediaUIForBGImage animated:YES];
}

Now as you can also see in the code, I set the delegate to self, and that is what I do with all the UIImagePickerControllers, but the problem is - in the delegate methods, how do I know which UIImagePickerController called the delegate method. Because the actions I need to take with the media is different for each UIImagePickerControllers. In the delegate method I do get the UIImagePickerController parameter, but it always have the name that it is assigned from the methods (picker). What can I use to know which UIImagePickerController to refer to?

解决方案

I think you can store a reference to each picker and then check if it is the same instance. Though I would question using multiple different picker instances, can you just configure a single one? Also they return pretty much the same results in any configuration, you can investigate result dictionary for specific needs.

self.oneImagePicker = [UIImagePickerController ...]
self.twoImagePicker = [UIImagePickerController ...]

//In delegate
if ([self.oneImagePicker isEqual:picker]) ...

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