CODEWITHSUNDEEP
iphoneuislider
user1567956
user1567956

Reputation: 131

UISlider Change values in iPhone

I have 4 values in UISlider. I want that when the slider value changes it should display the following values 

  if (slider.value==0)
  {
      label.text="5";
  }
  else if(slider.value==1)
  {
      label.text="10"
  }
  else
  {
      label.text="15";
  }

Upvotes: 0

Views: 972

Answers (2)

user529758
user529758

Reputation: 

if (slider.value == 0) {

and

if (slider.value == 1) {

is wrong - you can't compare floating-point numbers using the == (and != ) operators - because they're not exact values. You should do something like this:

if (slider.value < 0.001) {

and

if (slider.value > 0.999) {

Upvotes: 1

Ian L
Ian L

Reputation: 5591

You need to create a connection to the UISlider's Value Changed event in Interface Builder. You can implement a method such as:

- (IBAction)sliderValueChanged:(UISlider *)slider {
    if (slider.value < 1) {
        self.label.text = @"5";
    }
    else if (slider.value < 2) {
        self.label.text = @"10";
    }
    else {
        self.label.text = @"15";
    }
}

If you want to hook up the event programatically, you can use:

[self.mySlider addTarget:self action:@selector(sliderValueChanged:) forControlEvents:UIControlEventValueChanged];

Note that the slider will be reporting values with decimal places, so your cases where the value equals an integer are rare. Change the logic to use less-than checks as shown above.

Upvotes: 2

Related Questions