iOS Drawing App

[SunnyLi]

Hi Guys,

Back again as you were really helpful last time

Im following a tutorial on creating a whiteboard drawing app, but everytime i insert a certain piece of code it crashes the app when i go to the settings button.

This is the code:
.h

//
//  FlipsideViewController.h
//  SampleBrushes
//
//  Created by Andrea Busi on 01/03/10.
//  Copyright BubiDevs 2010. All rights reserved.
//

@protocol FlipsideViewControllerDelegate;


@interface FlipsideViewController : UIViewController {
	id <FlipsideViewControllerDelegate> delegate;
	
	IBOutlet UISlider *sliderRed, *sliderBlue, *sliderGreen, *sliderBlack, *sliderDimension;
	IBOutlet UIImageView *viewColour;
	IBOutlet UILabel *labelDimension;
	
	UIColor *penColour;
	float penDimension;
}

@property (nonatomic, assign) id <FlipsideViewControllerDelegate> delegate;
@property (nonatomic, assign) UIColor *penColour;
@property (nonatomic, assign) float penDimension;

- (IBAction)done;
- (IBAction)changeColour;
- (IBAction)changeDimension;

@end


@protocol FlipsideViewControllerDelegate
- (void)flipsideViewControllerDidFinish:(FlipsideViewController *)controller newColour:(UIColor*)colore newDimension:(float)dimension;
@end

flipsideviewcontroller.m

- (void)viewDidLoad {
    [super viewDidLoad];
    self.view.backgroundColor = [UIColor viewFlipsideBackgroundColor];
	
	const CGFloat *components = CGColorGetComponents([colorePennello CGColor]);
	[sliderRed setValue:components[0]];
	[sliderGreen setValue:components[1]];
	[sliderBlue setValue:components[2]];
	[sliderBlack setValue:components[3]];
	[viewColore setBackgroundColor:colorePennello];
	labelDimensione.text = [NSString stringWithFormat:@"%f",dimensionePennello];
	[sliderDimensione setValue:dimensionePennello];
}

The tutorial is here:

http://translate.google.com/transla...-brushes.html&rurl=translate.google.com&twu=1

 

[dejo]

but everytime i insert a certain piece of code it crashes the app when i go to the settings button.

When you insert which certain piece of code? All of what you posted? When the app crashes do you see any error messages in the console? Have you checked the crash log?

 

[PhoneyDeveloper]

How come the top code is in English and the bottom code is in Italian?

Anyway, your penColor property should be retain, not assign. This would likely cause a crash.

 

[SunnyLi]

How come the top code is in English and the bottom code is in Italian?

Anyway, your penColor property should be retain, not assign. This would likely cause a crash.

The tutorials in Italian im just puting it into english.

I put breakpoint in just it stops here:

- (void)viewDidLoad {
    [super viewDidLoad];
    self.view.backgroundColor = [UIColor viewFlipsideBackgroundColor];
	
	const CGFloat *components = CGColorGetComponents([penColour CGColor]);
	[B][sliderRed setValue:components[0]];[/B]
	[sliderGreen setValue:components[1]];
	[sliderBlue setValue:components[2]];
	[sliderBlack setValue:components[3]];
	[viewColour setBackgroundColor:penColour];
	labelDimensions.text = [NSString stringWithFormat:@"%f",penDimension];
	[sliderDimension setValue:penDimension];

	
}

not sure how to get up the crash logs etc

 

[dejo]

I put breakpoint in just it stops here:

No error message in the Debugger?