在UIButton中的动作选择内传递参数 [英] Passing argument within action selection in UIButton

问题描述

鉴于您有方法

-(void)aSelector:(id)anyArgument;

并以编程方式设置了UIButton

And have set up a UIButton programmatically

UIButton *myButton = [[UIButton alloc] init]  

好的，我的想法是，当您创建UIButton时，必须使用方法

Alright, I get the idea that when you create a UIButton, you have to use the method

[myButton addTarget:nil action@selector(aSelector:) for ControlEvents:UIControlEventTouchUpInside];

但是我该在哪里传递论点呢?我知道通常情况下，您会使用

But where do I pass the argument? I know that normally, you would use

[myButton withObject:anyArgument];

但是NSControl不允许这样做，但是可能因为选择器名称后面的冒号表明了这一点.

But NSControl doesn't allow for that but it is possible as the colon after the selector name indicates so.

推荐答案

通常，-aSelector:的定义如下

Typically, -aSelector: will be defined like this

- (void) aSelector:(id)sender
{
NSLog(@" sender = %@", sender);
}

，参数为myButton.请记住，您可能有多个按钮都在调用-aSelector方法:然后，您需要在运行时区分哪个是调用者(发送者).

and the argument will be myButton. Bear in mind that you might have several buttons all calling the method -aSelector: and you would, then, need to distinguish which was the caller (sender) at runtime.

这篇关于在UIButton中的动作选择内传递参数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IT屋！