[英]How do I initialize this custom class that inherits from UIButton?
我無法弄清楚我應該如何初始化這個自定義類,代碼不是我的,而且我是Obj-C的新手,所以我的速度很慢。
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摘錄
#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;
}
我只是包含了一小部分實現, 完整的源代碼可以在這里找到。 作為 Paul-Alexander 的這個存儲庫的一部分 。
我像這樣初始化它:
PFTintedButton* buttony = [PFTintedButton buttonWithType:UIButtonTypeCustom];
[buttony setTint:[UIColor redColor]];
[buttony setBackgroundColor:[UIColor redColor]];
[buttony setRenderType:PFTintedButtonRenderTypeCandy];
[buttony setTitle:@"Title for Button" forState:UIControlStateNormal];
它在PFDrawTools中打嗝,似乎色調變量為零。 那是因為我正在初始化錯誤嗎? 有人有這個成功嗎?
試試這個:
PFTintedButton* buttony = [[PFTintedButton alloc] initWithFrame:CGRectMake(x, y, width, height)];
它似乎顯式處理initWithFrame,我會嘗試。
PFTintedButton *buttony = [[[PFTintedButton alloc] initWithFrame:<some_frame>] autorelease];
你在PFTintedButton
類中定義了buttonWithType:
initialize方法嗎?
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