Objective C - How to change the UIslider value with button Click actions - iphone

Question

As show in the figure above I have 1 button to decrease and 1 button to increase the value of the slider.
The range of the slider is 1 to 10.
My requirement is to change slider's value 0.5 by each button click.
For example if the slider's current value is 4, clicking the + should change the value to 4.5 and change the display accordingly.
Same thing with negative button to change value to 3.5.
How can I accomplish this?

Answer 1

On tapPlusButton change the value of slider by adding 0.5 to current value like this.
[self.slider setValue:self.slider.value+0.5];

Answer 2

Create an outlet for the slider if it's created using Interface builder.
Then just do "mySliderOutletName.value += customValue";
Add the above code to the Action triggered by touch up inside for the UIButton.
If it's created from code, add it to the class interface, then you can refer to it in all the methods of the class.
There's a good video tutorial about UISlider here.

Answer 3

The steps are these:
Create a class variable with your UISlider, and set the min and the max values of it
Add a target to the buttons. When the button is pressed, do:
[self.mySlider setValue:self.mySlider.value + 0.5];

Answer 4

for iOS 11 Objective C
- (IBAction)Plus:(id)sender {
[self.mySlider setValue:self.mySlider.value+1];
NSInteger index = mySlider.value;
[self.imageView setImage:[UIImage imageNamed:[NSString stringWithFormat:#"%#.png", [imagenArray objectAtIndex:index]]]];
[_counter setText:[NSString stringWithFormat:#"%d/%lu", index+1, (unsigned long)imagenArray.count]];
}
- (IBAction)Menus:(id)sender {
[self.mySlider setValue:self.mySlider.value-1];
NSInteger index = mySlider.value;
[self.imageView setImage:[UIImage imageNamed:[NSString stringWithFormat:#"%#.png", [imagenArray objectAtIndex:index]]]];
[_counter setText:[NSString stringWithFormat:#"%d/%lu", index-1, (unsigned long)imagenArray.count]];
}