iOS - 如何检测按钮是否被按下两次

Question

我有一个按钮，您可以按下该按钮，该按钮的文本会发生变化。我希望能够检测到用户何时再次单击按钮，以便按钮文本将变回其原始文本。我怎么能那样做？这是我到目前为止的代码。

//Set Text and alignment for the buttons

[nocavities setTitle:@"No cavities\n5 points" forState:UIControlStateNormal];
nocavities.titleLabel.textAlignment = NSTextAlignmentCenter;

-(IBAction)nocavitiesaction:(id)sender {

[sender setTitle:@"Whenever you visit our office cavity-free, you will receive 5 points!" forState:UIControlStateNormal];
}

我觉得在 IBAction 中我应该将状态更改为

UIControlStateNormalPressed

但我不确定。

Answer 1

您可以在 IBAction

中设置一个计数器

像这样:

-(IBAction)nocavitiesaction:(id)sender {

    static int count = 0;
    count ++;
    if(count % 2 != 0){
        //Set title 1
    }else{
        //Set title 2
    }
}