Proper handling of UIControlEventValueChanged events

I have UISwitchwith the relevant UIControlEventValueChangedassociated with the function [- handleSwitch:].

View controller

- (IBAction)handleSwitch:(UISwitch *)sender
{
    static BOOL oldState;

    if (sender.on && !oldState) {
        NSLog(@"off => on");
    } else if (oldState && !sender.on) {
        NSLog(@"on => off");
    } else if (oldState && sender.on) {
        NSLog(@"Big bug source: on => on");
    } else {
        NSLog(@"Big bug source: off => off");
    }
    oldState = sender.on;
}

The program works fine when I press the switch once every few seconds. However, as soon as I start sending spam, I start getting a “big source of errors”.

It seems sender.onto change back to its old value before calling the function [- handleSwitch].

• Switching changes from OfftoOn
• The value changed event is queued
• Switching changes from OntoOff
• [- handleSwitch:] . , Off, , On , .
• [- handleSwitch] . , .

:

• ? UISwitch ?

• , . On = > On Off = > Off ?

• , [- handleSwitch]? , , ?

  , , , ? UISwitch , . , , , .