Question

非常感谢！

我正在开发一个应用程序，它有一个分接计数器来设置标签中的数量，然后标签值乘以分接计数器设置的数量，

标签将重置为0，但点击计数器不会，因此当用户点击计数器时，它会从最后一次计数开始

   @implementation ViewController

   //These are the tap counter buttons .m//

   - (IBAction)oneClicker:(UIButton *)sender
   {
       counter++;
       [_fourLabel setText:[NSString stringWithFormat:@"%d", counter]];
   }

    - (IBAction)oneAClicker:(UIButton *)sender
   {   
       counter--;
       [_fourLabel setText:[NSString stringWithFormat:@"%d", counter]];


    // these are the calculate & reset buttons in .m //






    - (IBAction)calculateButton:(UIButton *)sender
    {
        double total = ([self.fourLabel.text integerValue] * 4)+ ([self.sixLabel.text integerValue] * 6)+ ([self.ninetyFiveLabel.text integerValue] * 0.95)+ ([self.twoLabel.text integerValue] * 2)+ ([self.twoaLabel.text integerValue] * 2)+ ([self.threeLabel.text integerValue] * 3)+ ([self.oneFiftyLabel.text integerValue] * 1.5);

        self.totalLabel.text = [NSString stringWithFormat:@"$%.2f",total];
    }

    - (IBAction)resetButton:(UIButton *)sender
    {
        self.fourLabel.text = @"0";
        self.sixLabel.text = @"0";
        self.ninetyFiveLabel.text = @"0";
        self.twoaLabel.text = @"0";
        self.twoLabel.text = @"0";
        self.threeLabel.text = @"0";
        self.oneFiftyLabel.text = @"0";
        self.totalLabel.text = @"$0";
        // self.fourLabel.text = @"";
    }

        // this is .h i will just show a few //
@interface ViewController : UIViewController
{
NSInteger counter;
}
@property (strong, nonatomic) IBOutlet UILabel *fourLabel;

- (IBAction)calculateButton:(UIButton *)sender;
- (IBAction)resetButton:(UIButton *)sender;

Answer 1

counter = 0;

这假设计数器是一个整数。如果是别的，只需相应调整。

在将值存储在变量中之后如何将变量设置为0

1 个答案: