Iphone 添加UIImagePickerController时出现警告

我试图添加一个

UIImagePickerController

，我得到一个

不兼容类型“id”

编译器警告。我想知道为什么？以及解决方案

m

h

@interface-GobblesViewController:UIViewController
{
UIImagePickerController*图像选择器；
}
@属性（非原子，强）UIImagePickerController*imagePicker；

---

指向

[imagePicker setDelegate:self]的警告点

我不知道为什么会发生这种情况。

您收到此警告是因为在本例中，

self

对象表示您正在传递到

UIImagePickerController

的

委托

属性，不符合UIImagePickerControllerDelegate和UINavigationControllerDelegate协议。这是因为

UIImagePickerController

是

UINavigationController

的一个子类，它已经声明了自己的

委托

UIImagePickerController

上的

delegate

属性定义为：

@property (nonatomic, assign) id <UINavigationControllerDelegate, UIImagePickerControllerDelegate> delegate;

@interface GobblesViewController : UIViewController <UIImagePickerControllerDelegate>
{
  UIImagePickerController *imagePicker;
}
@property (nonatomic,strong)UIImagePickerController *imagePicker;

@property (nonatomic, assign) id <UINavigationControllerDelegate, UIImagePickerControllerDelegate> delegate;

@interface GobblesViewController : UIViewController <UIImagePickerControllerDelegate, UINavigationControllerDelegate>