Please see the following code: -(void)viewDidLoad { [super viewDidLoad]; UISwitch *mySwitch = [[UISwitch alloc] initWithFrame:CGRectMake(130, 235, 0, 0)]; [mySwitch addTarget:self action:@selector(changeSwitch:) forControlEvents:UIControlEventValueChanged]; [self.view addSubview:mySwitch]; } – (void)changeSwitch:(id)sender{ if([sender isOn]){ NSLog(@”Switch is ON”); } else{ NSLog(@”Switch is OFF”); } }
I think it’s a warning that Apple should fix it itself. Even in this sample project which is from WWDC19 this problem exists. There is a UISwitch in a cell of a table. When I tap it, the mentioned warning is raised. So, in my view, it is a bug that Apple should deal with.
My solution with #swift2: let onColor = _your_on_state_color let offColor = _your_off_state_color let mSwitch = UISwitch(frame: CGRect.zero) mSwitch.on = true /*For on state*/ mSwitch.onTintColor = onColor /*For off state*/ mSwitch.tintColor = offColor mSwitch.layer.cornerRadius = mSwitch.frame.height / 2.0 mSwitch.backgroundColor = offColor mSwitch.clipsToBounds = true Result: