iphone - 将图像添加到UIBarButtonItem按钮

我已使用以下代码将UITabButtonItem添加到我的视图控制器中。谁能告诉我是否有可能将图像与之关联？

UIBarButtonItem *button = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(favouriteButtonClicked:)];
viewController2.navigationItem.rightBarButtonItem = button;
[button release];
[self.navigationController pushViewController:viewController2 animated:YES];

我在其他地方使用了以下代码，但是像上面的代码一样，我将viewcontroller推到当前视图上，此代码不起作用。我不得不使用上面的代码。

UIButton *button =  [UIButton buttonWithType:UIButtonTypeCustom];
[button setImage:[UIImage imageNamed:@"unselected.png"] forState:UIControlStateNormal];
[button addTarget:self action:@selector(favouriteButtonClicked:) forControlEvents:UIControlEventTouchUpInside];
[button setFrame:CGRectMake(280, 25, 30, 30)];
viewController2.navigationController.navigationItem.rightBarButtonItem = [[[UIBarButtonItem alloc] initWithCustomView:button] autorelease];

[self.navigationController pushViewController:viewController2 animated:YES];

我不知道这是什么问题，但是当我用initWithBarButtonSystemItem替换此自定义按钮代码时，它可以正常工作！！！

最后，我整理了这个问题，并在此处发布了工作代码，但仍然不知道在baseviewcontroller中是否有按钮，并且像下面这样添加它，它不起作用！！！我不得不使用viewwillappear中接受的答案中给出的代码！

    [favButton addTarget:self action:@selector(favouriteButtonClicked:) forControlEvents:UIControlEventTouchUpInside];
     self.navigationItem.rightBarButtonItem = [[[UIBarButtonItem alloc] initWithCustomView:button] autorelease];

以下代码仍然无法正常工作！！！不知道发生了什么事。

MPMoviePlayerViewController *videoController = [[[MPMoviePlayerViewController alloc] initWithContentURL:[NSURL URLWithString:filePath]] autorelease];

UIButton* favouritebutton =  [UIButton buttonWithType:UIButtonTypeCustom];
[favouritebutton setBackgroundImage:[UIImage imageNamed:@"unselected.png"] forState:UIControlStateNormal];
[favouritebutton addTarget:self action:@selector(favouriteButtonClicked:) forControlEvents:UIControlEventTouchUpInside];
[favouritebutton setFrame:CGRectMake(280, 25, 30, 30)];
videoController.navigationItem.rightBarButtonItem = [[[UIBarButtonItem alloc] initWithCustomView:favouritebutton] autorelease];

[self presentMoviePlayerViewControllerAnimated:videoController];

谢谢。

最佳答案

UIButton *favButton = [[UIButton alloc] init];

[favButton setImage:[UIImage imageNamed:@"unselected.png"] forState:UIControlStateNormal];
[favButton addTarget:self action:@selector(favouriteButtonClicked:)
   forControlEvents:UIControlEventTouchUpInside];

UIBarButtonItem *button = [[UIBarButtonItem alloc]
                                initWithCustomView:favButton];

self.navigationItem.rightBarButtonItem = button;

[button release];
[favButton release];

关于iphone - 将图像添加到UIBarButtonItem按钮，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/6817469/