ios - 如何区分didFinishPickingMediaWithInfo中的UIImagePickerController

Question

我有两个 UIImageViews，我想在其中加载两个不同的图像。我有两个按钮触发 UIImagePickerController 并调用我的

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

方法。

有没有办法区分上面的方法调用的是哪个picker？

Answer 1

你可以创建一个 UIButton 的实例

@interface YourClass ()
{
   UIButton *_selectedButton;
}

并且在触发UIImagePickerController之前，可以将按钮保存在实例变量中

-(void)button1Clicked:(UIButton *)button1{
      _selectedButton = button1;
     // call UIImagePickerController
} 

-(void)button2Clicked:(UIButton *)button2{
      _selectedButton = button2;
      // call UIImagePickerController
} 


- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info{   
      if (_selectedButton == button1){
         // perform your logic 
      } else if (_selectedButton == button2){
        // perform your logic 
      }
}