iPhone 中相册取消按钮的动作事件

Question

我正在使用 tabBarBased 应用程序。单击 tabBarButton 之一时，它会打开相册。在相册中，顶部（​​导航栏）右侧有一个取消按钮？这里我想执行取消按钮的操作事件单击...在单击取消按钮时我想转到另一个 tabBar 视图...

请帮助我做到这一点...

提前感谢您的考虑和努力... 问候， 雷努加

Answer 1

这是 UIImagePickerControllerDelegate 的类定义：

@protocol UIImagePickerControllerDelegate<NSObject>
@optional
// The picker does not dismiss itself; the client dismisses it in these callbacks.
// The delegate will receive one or the other, but not both, depending whether the user
// confirms or cancels.
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)image editingInfo:(NSDictionary *)editingInfo __OSX_AVAILABLE_BUT_DEPRECATED(__MAC_NA,__MAC_NA,__IPHONE_2_0,__IPHONE_3_0);
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info;
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker;

@end

我认为上面提到的方法之一就是您所需要的：

- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker;

Answer 2

将 UITabBarController 的 selectedViewController 属性设置为要切换到的视图控制器。向此属性分配新的视图控制器会更改当前显示的视图，并在选项卡栏中选择适当的选项卡。