objective-c - 使用参数调用选择器

Question

我有一个方法:

-(void)pickTheQuiz:(id)sender etat:(int)etatQuiz{
   //i need to get the etatQuiz value here    


}

在我的代码中，我这样调用上面的方法:

int etat_quiz=4;
[button addTarget:self action:@selector(pickTheQuiz:etat:)withObject:etat_quiz forControlEvents:UIControlEventTouchUpInside];

这样做时，出现错误:

Receiver type UIButton for instance message does not declare a method with selector 'addTarget:action:withObject:forControlEvent

编辑:

-(void)pickTheQuiz:(id)sender etat:(int)etatQuiz{


    NSLog(@"The part number is:%i",((UIControl*)sender).tag);

}

Answer 1

您不能像这样传递参数。相反，您可以将“etatQuiz”设置为按钮的标签。并且可以在选择器中访问它。 例如:

button.tag = etatQuiz;
[button addTarget:self action:@selector(pickTheQuiz:) forControlEvents:UIControlEventTouchUpInside];


-(void)pickTheQuiz:(UIButton *)sender {
   int value  = sender.tag;


}