NSTimer Help!

[ShayansMind]

Okay, hello

so am Trying to build an app where there is a uilabel and a button when u tap the button the label counts up by seconds and milliseconds

basically the label should be 0.00 (seconds.milliseconds)

how can i make a simple action and timer that do this my code won't work

code:

-(IBAction)start {

mainInt = 0;
myTime = [NSTimer scheduledTimerWithTimeInterval:0.01f target:self selector:@selector(randomMainVoid) userInfo:nil repeats:YES];

}

-(IBAction)stop {

[myTime invalidate];
}

-(IBAction)reset {

time.text = @"0.00";
}

-(void)randomMainVoid {
mainInt + 0.01;
time.text = [NSString stringWithFormat:@"0.00", mainInt];
}

someone please help me,
I am fairly new to the SDK

[Electronicfun]

Originally Posted by ShayansMind

Okay, hello

so am Trying to build an app where there is a uilabel and a button when u tap the button the label counts up by seconds and milliseconds

basically the label should be 0.00 (seconds.milliseconds)

how can i make a simple action and timer that do this my code won't work

code:

-(IBAction)start {

mainInt = 0;
myTime = [NSTimer scheduledTimerWithTimeInterval:0.01f target:self selector:@selector(randomMainVoid) userInfo:nil repeats:YES];

}

-(IBAction)stop {

[myTime invalidate];
}

-(IBAction)reset {

time.text = @"0.00";
}

-(void)randomMainVoid {
mainInt + 0.01;
time.text = [NSString stringWithFormat:@"0.00", mainInt];
}

someone please help me,
I am fairly new to the SDK

first try taking the f after 0.01 in

-(IBAction)start {

mainInt = 0;
myTime = [NSTimer scheduledTimerWithTimeInterval:0.01f target:self selector:@selector(randomMainVoid) userInfo:nil repeats:YES];

try that

[ShayansMind]

doesn't work

[Electronicfun]

Originally Posted by ShayansMind

doesn't work

ill get back to you in a few min ill run some test

[BrianSlick]

time.text = [NSString stringWithFormat:@"%.02f", mainInt];

This assumes that mainInt is actually a poorly-named float.

[Electronicfun]

you forgot to add time.text = [NSString stringWithFormat:@"%i"];

[ShayansMind]

doesnt work

[BrianSlick]

Ok, I can see this is going to take forever.

What DOES it do? In what way does it not work?

[ShayansMind]

Originally Posted by BrianSlick

Ok, I can see this is going to take forever.

What DOES it do? In what way does it not work?

ok its simple i want a button and a label when you tap the button the label counts in this format 0.00 (seconds:milliseconds) how do i this i know u dont work for free, if you help me i will mention you on this site: iphoneapptuts.com

it gets alot of visitors and ill give u shoutout on my next videos

please I really need help on this

[BrianSlick]

No, I'm not asking you how it is supposed to work. I get that.

I'm asking you what it is actually doing. You run the app. You see something. What you see is not what you wanted. What did you see?

[ShayansMind]

Originally Posted by BrianSlick

No, I'm not asking you how it is supposed to work. I get that.

I'm asking you what it is actually doing. You run the app. You see something. What you see is not what you wanted. What did you see?

listen dude, i saw my label not doing anything when i click the button the label can only count in 1 second by second i need a stopwatch kind of thing

i will be on for ten mins then again on tommarrow

[BrianSlick]

-(void)randomMainVoid {
mainInt + 0.01;
NSLog(@"mainInt is: %.02f", mainInt");
time.text = [NSString stringWithFormat:@"%.02f", mainInt];
}

Add that. What does it say when you run it?

[atmel]

Originally Posted by ShayansMind

Okay, hello

so am Trying to build an app where there is a uilabel and a button when u tap the button the label counts up by seconds and milliseconds

basically the label should be 0.00 (seconds.milliseconds)

how can i make a simple action and timer that do this my code won't work

code:

-(IBAction)start {

mainInt = 0;
myTime = [NSTimer scheduledTimerWithTimeInterval:0.01f target:self selector:@selector(randomMainVoid) userInfo:nil repeats:YES];

}

-(IBAction)stop {

[myTime invalidate];
}

-(IBAction)reset {

time.text = @"0.00";
}

-(void)randomMainVoid {
mainInt + 0.01;
time.text = [NSString stringWithFormat:@"0.00", mainInt];
}

someone please help me,
I am fairly new to the SDK

hello,
you need modify following:
1. declare mainInt as float type: float mainInt ;
2. in reset() method: add mainInt = 0.0;
3. change "mainInt + 0.01" => mainInt += 0.01;
4. change time.text = [NSString stringWithFormat:@"0.00", mainInt]
=> time.text = [NSString stringWithFormat:@"%.2f", mainInt]

[BrianSlick]

Originally Posted by atmel

3. change "mainInt + 0.01" => mainInt += 0.01;

*forehead smack*
I should have seen that. Good catch.

[ShayansMind]

Originally Posted by BrianSlick

-(void)randomMainVoid {
mainInt + 0.01;
NSLog(@"mainInt is: %.02f", mainInt");
time.text = [NSString stringWithFormat:@"%.02f", mainInt];
}

Add that. What does it say when you run it?

mainInt = 0.0 when i run the code but the label doesn't change to like 0.01 etc

[ShayansMind]

all i had to do was change mainInt to a float type instaed of an integer
thanks everyone!