How do I initialize this custom class that inherits from UIButton? - iphone

Question

I can't figure out how I'm supposed to initialize this custom class, the code isn't mine and I'm fairly new to Obj-C, so I'm slow on the uptake.
PFTintedButton.h
#import <UIKit/UIKit.h>
#class CALayer;
typedef enum
{
PFTintedButtonRenderTypeStandard,
PFTintedButtonRenderTypeCandy,
PFTintedButtonRenderTypeOpal,
} PFTintedButtonRenderType;
#interface PFTintedButton : UIButton
{
#private
UIColor * tint;
CGFloat cornerRadius;
PFTintedButtonRenderType renderType;
UIImage * stretchImage;
CALayer * glowLayer;
UILabel * subLabel;
BOOL customShadow;
BOOL customTitleColor;
}
#property( nonatomic, retain ) UIColor * tint;
#property( nonatomic, assign ) CGFloat cornerRadius;
#property( nonatomic, assign ) PFTintedButtonRenderType renderType;
#property( nonatomic, readonly ) UILabel * subLabel;
#end
PFTintedButton.m excerpt
#import "PFTintedButton.h"
#import "PFDrawTools.h"
#import "UIColor+PFExtensions.h"
#import <QuartzCore/QuartzCore.h>
#define glowRadius 30
#interface PFTintedButton()
-(void) createBackgroundImage;
-(void) createGlowLayer;
#end
#implementation PFTintedButton
-(void) dealloc
{
SafeRelease( tint );
SafeRelease( stretchImage );
SafeRelease( subLabel );
SafeRelease( glowLayer );
[NSObject cancelPreviousPerformRequestsWithTarget: self selector: #selector(createGlowLayer) object: nil];
[NSObject cancelPreviousPerformRequestsWithTarget: self selector: #selector(renderGlowLayerOnMainThread) object: nil];
[super dealloc];
}
-(void) initCommon
{
cornerRadius = 6;
}
-(id) initWithFrame: (CGRect) frame
{
if( self = [super initWithFrame: frame] )
{
[self initCommon];
}
return self;
}
-(id) initWithCoder: (NSCoder *) coder
{
if( self = [super initWithCoder: coder] )
{
// this is such a hack but there's no other way to determine if the title label's settings
// have been modified in IB.
NSDictionary * dic = [coder decodeObjectForKey: #"UIButtonStatefulContent"];
NSObject * st = [dic objectForKey: [NSNumber numberWithInt: UIControlStateNormal]];
NSString * bc = [st description];
customTitleColor = [bc rangeOfString: #"TitleColor = UIDeviceRGBColorSpace 0.196078 0.309804 0.521569 1"].location == NSNotFound;
customShadow = [bc rangeOfString: #"ShadowColor = UIDeviceRGBColorSpace 0.5 0.5 0.5 1"].location == NSNotFound;
[self initCommon];
//[super setBackgroundColor: [[UIColor redColor] colorWithAlphaComponent: .5]];
}
return self;
}
I just included a small bit of the implementation, the full source can be found here. As a part of this repository by Paul-Alexander.
I initialize it like this:
PFTintedButton* buttony = [PFTintedButton buttonWithType:UIButtonTypeCustom];
[buttony setTint:[UIColor redColor]];
[buttony setBackgroundColor:[UIColor redColor]];
[buttony setRenderType:PFTintedButtonRenderTypeCandy];
[buttony setTitle:#"Title for Button" forState:UIControlStateNormal];
And it hiccups in PFDrawTools, it seems the tint variable is nil. So is it because I am initializing it incorrectly? Has anyone had success with this?

Answer 1

It seems to explicitly handle initWithFrame, I would try that.
PFTintedButton *buttony = [[[PFTintedButton alloc] initWithFrame:<some_frame>] autorelease];

Answer 2

Try this instead:
PFTintedButton* buttony = [[PFTintedButton alloc] initWithFrame:CGRectMake(x, y, width, height)];

Answer 3

Have you defined buttonWithType: initialize method in PFTintedButton class?