How can I create and display a UISlider programmatically in iOS?

Question

I found the code below in the Apple documentation and added it to my viewDidLoad method but the slider doesn't appear when I run the code.

CGRect frame = CGRectMake(0.0, 0.0, 200.0, 10.0);
UISlider *slider = [[UISlider alloc] initWithFrame:frame];
[slider addTarget:self action:@selector(sliderAction:) forControlEvents:UIControlEventValueChanged];
[slider setBackgroundColor:[UIColor clearColor]];
slider.minimumValue = 0.0;
slider.maximumValue = 50.0;
slider.continuous = YES;
slider.value = 25.0;

Answer 1

You need to add the slider into your view hierarchy. Add [self.view addSubview:slider]; and it should work.