UIButton multiple events - ios

Question

I'm working on a project that ask to do the following steps.
Displays a UIButton with an initial count of 0
Touching the UIButton first time increments the count
Touching the UIButton second time increment the count every 1 second
My code got stuck at step 3, if I touch the UIButton the second time, the count will keep incrementing by 1. I can never get into [self performSelector:#selector(doDelay:) withObject:button afterDelay:1.0].
How can I add a counter to count how many times the user has clicked the UIButton?
Here is the code I have:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
// Override point for customization after application launch.
self.window.backgroundColor = [UIColor whiteColor];
[self.window makeKeyAndVisible];
CGRect rect=[[UIScreen mainScreen] bounds];
UIButton *button=[[UIButton alloc] initWithFrame:rect];
button.backgroundColor=[UIColor redColor];
//Step (1)
[button setTitle:#"Count = 0" forState:UIControlStateNormal];
[self.window addSubview:button];
//Step (2)
[button addTarget:self action:#selector(doButton:) forControlEvents:UIControlEventTouchUpInside];
//Step (3)
[self performSelector:#selector(doDelay:) withObject:button afterDelay:1.0];
return YES;
}
-(void)doButton:(id)sender
{
static int count;
count++;
NSString *s = [NSString stringWithFormat:#"Count = %i", count];
UIButton *b = sender;
[b setTitle:s forState:UIControlStateNormal];
}
-(void)doDelay:(id)object
{
[self doButton:object];
[self performSelector:#selector(doDelay:) withObject:object afterDelay:1.0];
}

Answer 1

For multiple button actions you have to remove button target doButton and add other you wanna. For your case pass to doDelay method your count and add it to afterDelay:

Answer 2

Try this:
int count;
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
// Override point for customization after application launch.
self.window.backgroundColor = [UIColor whiteColor];
[self.window makeKeyAndVisible];
CGRect rect=[[UIScreen mainScreen] bounds];
UIButton *button=[[UIButton alloc] initWithFrame:rect];
button.backgroundColor=[UIColor redColor];
//Step (1)
count = 0;
[self updateButton:button];
[self.window addSubview:button];
//Step (2) and (3)
[button addTarget:self action:#selector(doButton:) forControlEvents:UIControlEventTouchUpInside];
return YES;
}
-(void)updateButton:(UIButton *)button {
NSString *s = [NSString stringWithFormat:#"Count = %i", count];
[button setTitle:s forState:UIControlStateNormal];
}
-(void)doButton:(UIButton *)button
{
count++;
if(count == 1) {
//Step(2)
[self updateButton:button];
} else if(count == 2){
//Step (3)
[self performSelector:#selector(doDelay:) withObject:button afterDelay:1.0];
}
}
-(void)doDelay:(UIButton *)button
{
count++;
[self updateButton:button];
[self performSelector:#selector(doDelay:) withObject:button afterDelay:1.0];
}

Answer 3

Just Remove this line
[self performSelector:#selector(doDelay:) withObject:object afterDelay:1.0];
and Replace this two action in your code....
-(void)doButton:(id)sender
{
static int count;
count++;
NSString *s = [NSString stringWithFormat:#"Count = %i", count];
UIButton *b = sender;
[b setTitle:s forState:UIControlStateNormal];
if (count == 2) {
[NSTimer scheduledTimerWithTimeInterval:1.0
target:self selector:#selector(doDelay:) userInfo:sender repeats:YES];
}
}
-(void)doDelay:(NSTimer *)timer
{
[self doButton:timer.userInfo];
}