Question

我正在尝试更改UIImagePickerController的导航栏按钮。到目前为止，我只设法更改了右侧栏按钮项（“取消”按钮）：

- (void)navigationController:(UINavigationController *)navigationController         
       willShowViewController:(UIViewController *)viewController animated:(BOOL)animated {

       UINavigationBar *bar = navigationController.navigationBar;
       UINavigationItem *top = bar.topItem;
       top.title = @"Photos";
       UIImage *buttonImageCancel = [UIImage imageNamed:@"DoneBarButton.png"];
       UIButton *buttonCancel = [[UIButton alloc] initWithFrame:CGRectMake(0,5,55, 29)];
       [buttonCancel setBackgroundImage:buttonImageCancel forState:UIControlStateNormal];
       [buttonCancel addTarget:self action:@selector(imagePickerControllerDidCancel:) forControlEvents:UIControlEventTouchUpInside];
       [buttonCancel setTitle:@"Cancel" forState:UIControlStateNormal];
       [buttonCancel setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
       [[buttonCancel titleLabel] setFont:[UIFont boldSystemFontOfSize:10]];
       UIBarButtonItem *barButtonCancel = [[UIBarButtonItem alloc] initWithCustomView:buttonCancel];
       [top setRightBarButtonItem:barButtonCancel];   }

但是在其他视图控制器（例如“照片库”）中，“取消”按钮再次是旧的。此外，在切换回主选择器视图后，定制的“取消”按钮再次被标准的替换。有谁知道如何更改这些按钮？子类？非常感谢！

Answer 1

只有在推送视图控制器时才会调用您实现的方法。如果您想在整个选择器中进行更改，则可以使用导航控制器类别。

自定义UIImagePickerController的导航项

1 个答案: