如何识别编程 UIButton Xcode 的按钮按下

Question

我使用此代码在导航栏上以编程方式创建 UIBarButtons，如何设置按钮以编程方式发送 IBAction。 I.O.W.如何以编程方式放置视图以识别 UITapGestureRecognizer（设置 touchUpInside 事件）并将其连接到 IBAction？

self.navigationController.navigationBar.tintColor = [UIColor colorWithRed:153/256.0 green:204/256.0 blue:51/256.0 alpha:1.0];

self.navigationController.navigationBar.tintColor = [UIColor whiteColor];

self.navigationController.navigationBar.titleTextAttributes = [NSDictionary dictionaryWithObject:[UIColor whiteColor] forKey:NSForegroundColorAttributeName];

self.navigationItem.title = @"Feed";

UIBarButtonItem *cameraItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCamera target:self action:nil];
UIBarButtonItem *postItem = [[UIBarButtonItem alloc]initWithImage:[UIImage imageNamed:@"myIcon.png"] style:UIBarButtonItemStyleBordered target:self action:nil];

UIBarButtonItem *addPlusItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:nil];
UIBarButtonItem *optionsItem = [[UIBarButtonItem alloc]initWithImage:[UIImage imageNamed:@"myIcon2.png"] style:UIBarButtonItemStyleBordered target:self action:nil];

NSArray *cameraAndPostItem = @[cameraItem, postItem];
NSArray *addPlusAndOptionsItem = @[optionsItem, addPlusItem];

self.navigationItem.leftBarButtonItems = cameraAndPostItem;
self.navigationItem.rightBarButtonItems = addPlusAndOptionsItem;

编辑：当用户按下我以编程方式实现的 UIBarButtonItem 时，我正在尝试执行 segue。

Answer 1

设置按钮的目标和动作

UIBarButtonItem *cameraItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCamera target:self action:nil];
cameraItem.target = self;
cameraItem.action = @selector(cameraItemButtonInvoked);

//or short
UIBarButtonItem *cameraItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCamera target:self action:@selector(cameraItemButtonInvoked)];

...

- (IBAction)cameraItemButtonInvoked {
    .... // e.g.
    [self performSegueWithIdentifier:@"ShowDetail" sender:sender];
}

Answer 2

您将像这样将操作设置为 UIBarButton：

UIBarButtonItem *addPlusItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(addSomething:)];

注意动作部分，在那里你传递了要调用的选择器。像这样在 ViewController 中编写该选择器：

- (void) addSomething:(id)sender{
    NSLog(@"I'm adding something..");
}

对其余按钮执行相同操作。