我试着用UIStepper
来增加或减少一个整数,
在UIStepper
头文件中有两个UIButton
:
UIButton *_plusButton;
UIButton *_minusButton;
例如:
- (IBAction)changeValue:(id)sender
{
UIStepper *stepper = (UIStepper *) sender;
stepper.maximumValue = 10;
stepper.minimumValue = 0;
if (stepper)
{
integer++;
[label setText:[NSString stringWithFormat:@"%d",integer]];
}
else
{
integer--;
[label setText:[NSString stringWithFormat:@"%d",integer]];
}
}