如何检测iPhone中是否单击了任何按钮

Question

I have an iphone app i want that befor moving to next screen it should click on any of the 4 or five button i have and if user does not click on any button then it may not move to next screen

Firs two button from which user must click any one to move to next otherwise not

-(IBAction)locationOneButtonAction{

    UIImage *buttonImage = [UIImage imageNamed:@"radiogreen.png"];  
    UIImage *buttonImageOne=[UIImage imageNamed:@"radiowhite.png"];

    [locationOneButton setImage:buttonImage forState:UIControlStateNormal];
    [locationOneButton setImage:buttonImage forState:UIControlStateNormal];

    [locationThreeButton  setImage:buttonImageOne forState:UIControlStateNormal];
    [locationTwoButton  setImage:buttonImageOne forState:UIControlStateNormal];

    [locationFourButton  setImage:buttonImageOne forState:UIControlStateNormal];
    [locationFiveButton  setImage:buttonImageOne forState:UIControlStateNormal];
    [locationSixButton  setImage:buttonImageOne forState:UIControlStateNormal];

    resturantLocation=@"Common Man - Bedford, MA";
}


-(IBAction)locationTwoButtonAction{

    UIImage *buttonImage = [UIImage imageNamed:@"radiogreen.png"];
    UIImage *buttonImageOne=[UIImage imageNamed:@"radiowhite.png"];

    [locationOneButton setImage:buttonImageOne forState:UIControlStateNormal];
    [locationThreeButton  setImage:buttonImageOne forState:UIControlStateNormal];
    [locationTwoButton  setImage:buttonImage forState:UIControlStateNormal];
    [locationFourButton  setImage:buttonImageOne forState:UIControlStateNormal];

    [locationFiveButton  setImage:buttonImageOne forState:UIControlStateNormal];
    [locationSixButton  setImage:buttonImageOne forState:UIControlStateNormal];

    resturantLocation=@"Common Man - Arlingtion, NY";
}

Next Button Move to the next Screen

-(IBAction)nextButton{

    FoodViewController*targetController=[[FoodViewController alloc]init];
    targetController.resturantLocation=resturantLocation;

    [self.navigationController pushViewController:targetController animated:YES];
}

Answer 1

Most Simple Way is to get a Flag.. in .h file Use a

BOOL _flag;

in viewWillAppear set it as _flag = NO;

On your each button's action which are mendatory to click before going on next screen set it YES like:

-(IBAction)locationOneButtonAction{
    // your stuff
    _flag = YES;
}
-(IBAction)locationTwoButtonAction{
    // your stuff
    _flag = YES;
}

In your next Button click use it like

-(IBAction)nextButton{

    if(_flag) {
        FoodViewController*targetController=[[FoodViewController alloc]init];
        targetController.resturantLocation=resturantLocation;
        [self.navigationController pushViewController:targetController animated:YES];
    }
}

Hope this helps :) Let me know if you are looking for something else

Answer 2

您可以使用bool标志来确定是否单击了任何按钮，如果单击了任何按钮，则只需将该bool标志设置为true，否则将其初始化为false，然后在用户单击next时只需检查该bool标志是否为true或false。如果为false，则不允许用户继续。