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.

Answer 2

Try this Code:

Create a new slider

-(IBAction)mySlider {      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;     [self.view addSubview:slider]; } 

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Slider Actions

-(void)sliderAction:(id)sender {     UISlider *slider = (UISlider*)sender;     float value = slider.value;     //-- Do further actions }