如何将变量传递给UIButton操作 [英] how to pass a variable to a UIButton action

问题描述

我想将变量传递给UIButton操作，例如

I want to pass a variable to a UIButton action, for example

NSString *string=@"one";
[downbutton addTarget:self action:@selector(action1:string)
     forControlEvents:UIControlEventTouchUpInside];

我的行动功能就像

-(void) action1:(NSString *)string{
}

但是，它会返回语法错误。
有人可以告诉我如何将变量传递给UIButton操作吗？

However, it returns a syntax error. Can someone show me how to pass a variable to a UIButton action?

推荐答案

将其更改为：

[downbutton addTarget:self action:@selector(action1:) forControlEvents:UIControlEventTouchUpInside];

我不知道Iphone SDK，但是按钮动作的目标可能会收到一个id （通常命名为发件人）。

I don't know about the Iphone SDK, but the target of a button action probably receives an id (usually named sender).

- (void) buttonPress:(id)sender;

在方法调用中，发件人应该是您案例中的按钮，允许您阅读诸如它的名字，标签等。

Within the method call, sender should be the button in your case, allowing you to read properties such as it's name, tag, etc.

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