问题描述
我是iOS新手。我有一个导航栏按钮，点击它时应该执行我自己的功能。最好的方法是什么？
I am an iOS newbie. I have a navigation bar button which when clicked should execute a function of my own. What is the best way to do that?
UIBarButtonItem *doneBarButtonItem=[[UIBarButtonItem alloc] init];
doneBarButtonItem.title=@"Done";
self.navigationItem.rightBarButtonItem = doneBarButtonItem;
[doneBarButtonItem release];
推荐答案
一种方法是使用目标和操作进行初始化：
One way is to init with the target and action:
UIBarButtonItem *buttonHello = [[UIBarButtonItem alloc] initWithTitle:@"Say Hello"
style:UIBarButtonItemStyleBordered target:self action:@selector(sayHello:)];
另一种方法是在创建后设置目标和操作
Another way is to set the target and action after you created it
[buttonHello setTarget:self];
[buttonHello setAction:@selector(sayHello:)];
Target是将被调用的对象的实例。在self的情况下，该方法将在该对象的实例上。
Target is the instance of the object that will get called. In the case of self, the method will be on this instance of the object.
Action是将被调用的方法。通常，您使用IBAction对其进行装饰，以向设计者暗示它是一个动作。它编译为无效。
Action is the method that will get called. Typically, you decorate it with IBAction to hint to the designer that it's an action. It compiles to void.
- (IBAction)sayHello:(id)sender
{
// code here
}
这篇关于将自定义选择器添加到UIBarButtonItem的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！