A 1.2. Creating and Using Switches with UISwitch

Let’s create a property of type UISwitch and call it mainSwitch:

#import "ViewController.h"

@interface ViewController ()
@property (nonatomic, strong) UISwitch *mainSwitch;
@end

Let’s create our switch and place it on our view controller’s view:

- (void)viewDidLoad
{
    [super viewDidLoad];

    self.mainSwitch = [[UISwitch alloc] initWithFrame:CGRectMake(100, 100, 55, 60)];
    [self.view addSubview:self.mainSwitch];
    [self.mainSwitch setOn:YES animated:YES];

    /* Adjust the off-mode tint color */
    self.mainSwitch.tintColor = [UIColor redColor];
    /* Adjust the on-mode tint color */
    self.mainSwitch.onTintColor = [UIColor brownColor];
    /* Also change the knob's tint color */
    self.mainSwitch.thumbTintColor = [UIColor greenColor];

    if ([self.mainSwitch isOn]) {

        NSLog(@"yes");
    } else {
        NSLog(@"No");

    }

    [self.mainSwitch addTarget:self action:@selector(switchIsChanged:)
              forControlEvents:UIControlEventValueChanged];

}

- (void) switchIsChanged:(UISwitch *)paramSender{
  //  NSLog(@"Sender is = %@", paramSender);
    if ([paramSender isOn]){
        NSLog(@"The switch is turned on.");
    }else{
        NSLog(@"The switch is turned off.");
}