Custom UIButton(CheckBox) add responder to action iOS SDK - ios

Question

I have custom UIButton class:
CheckBox.h
#interface CheckBox : UIButton {
BOOL isChecked;
IBOutlet UIWebView *webview;
IBOutlet UIImageView *img;
NSMutableString *labelText;
NSInteger fontSize;
NSInteger heightWebView;
}
#property (nonatomic,retain) NSMutableString *labelText;
#property (nonatomic,retain) UIImageView *img;
#property (nonatomic,retain) UIWebView *webview;
#property (nonatomic,assign) BOOL isChecked;
-(IBAction) checkBoxClicked;
-(void)addText:(NSString *) text redLetter:(NSInteger)redLetter isBold:(NSInteger)
isBold;
-(BOOL)getStatus;
-(NSString*)getText;
-(void)setFontSize:(NSInteger)setFontSizeValue;
#end
CheckBox.m look on IBAction i need implement functionality there
#import "CheckBox.h"
#implementation CheckBox
#synthesize isChecked, webview, img, labelText, delegate;
- (id)initWithFrame:(CGRect)frame {
if (self == [super initWithFrame:frame]) {
// Initialization code
fontSize = 2;
self.isChecked = NO;
self.labelText = [[NSMutableString alloc] init];
self.contentHorizontalAlignment =
UIControlContentHorizontalAlignmentLeft;
img = [[UIImageView alloc] initWithFrame:CGRectZero];
img.image = [UIImage imageNamed:#"checkbox.png"];
[self addSubview:img];
webview = [[UIWebView alloc] initWithFrame:frame];
webview.backgroundColor = [UIColor clearColor];
[webview setOpaque:NO];
webview.userInteractionEnabled = NO;
[self addSubview:webview];
/* [self setImage:[UIImage imageNamed:
#"checkbox.png"]
forState:UIControlStateNormal];*/
[self addTarget:self action:
#selector(checkBoxClicked)
forControlEvents:UIControlEventTouchUpInside];
}
return self;
}
-(IBAction) checkBoxClicked{
if(self.isChecked ==NO){
self.isChecked =YES;
img.image = [UIImage imageNamed:#"checkbox-checked.png"];
}else{
self.isChecked =NO;
img.image = [UIImage imageNamed:#"checkbox.png"];
}
}
-(BOOL)getStatus{
return self.isChecked;
}
-(NSString*)getText{
return [NSString stringWithFormat:#"%#",self.labelText];
}
-(void)setFontSize:(NSInteger)setFontSizeValue {
fontSize = setFontSizeValue;
if (fontSize >2) {
heightWebView = fontSize+2;
}
}
-(void)addText:(NSString *) text redLetter:(NSInteger)redLetter isBold:(NSInteger)isBold
{
[self.labelText setString:text];
if (redLetter != 0) {
NSString *first;
NSString *red;
NSString *second;
first = [text substringWithRange:NSMakeRange(0, redLetter-1)];
red = [text substringWithRange:NSMakeRange(redLetter-1, 1)];
second = [text substringWithRange:NSMakeRange(redLetter, [text length] - redLetter )];
if(isBold == 0) {
NSString *html = [NSString stringWithFormat:#"<font size=\"%d\"><p>%#<span style=\"color:red;\">%#</span>%#</p></font>",fontSize, first,red,second];
[webview loadHTMLString:html baseURL:nil];
}else{
NSString *html = [NSString stringWithFormat:#"<font size=\"%d\"><p>%#<span style=\"color:red;\">%#</span>%#</p></font>",fontSize, first,red,second];
[webview loadHTMLString:html baseURL:nil];
}
}else {
if(isBold == 0) {
NSString *html = [NSString stringWithFormat:#"<font size=\"%d\"><p>%#</p></font>",fontSize, text];
[webview loadHTMLString:html baseURL:nil];
}else{
NSString *html = [NSString stringWithFormat:#"<font size=\"%d\"><p>%#</p></font>",fontSize, text];
[webview loadHTMLString:html baseURL:nil];
}
}
}
- (void)layoutSubviews {
img.frame = CGRectMake(0, 5, 18 , 18);
webview.frame = CGRectMake(12, 0-heightWebView, self.bounds.size.width- 11 , 25+heightWebView);
}
- (void)dealloc {
[webview release];
[img release];
[super dealloc];
}
#end
I need to add functionality to this class, that when user click on button in class where i implement CheckBox class will call some void.
Let me explain better i want to implement here functionality like in UIAlertView where you click on button calls
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
I need something like
- (void)checkBox:(CheckBox *)checkBox didStatusChanged:(BOOL)checkBoxStatus

Answer 1

Sounds like you want to implement a delegate protocol. This would go at the top of checkbox.h above your #interface
#protocol CheckBoxDelegate
#optional
- (void)checkBox:(CheckBox *)checkBox didStatusChanged:(BOOL)checkBoxStatus;
#end
You'd then want to add this to your checkbox.h #interface
#property (monatomic, assign) NSObject <CheckBoxDelegate> delegate;
You could then implement the
checkBox:(CheckBox *)checkBox didStatusChanged:(BOOL)checkBoxStatus
function in your ViewController or whatever is creating the checkboxes, and for each checkbox do
[checkbox setDelegate:self];
Then inside -(IBAction) checkBoxClicked you can call
[delegate checkBox:self didStatusChanged:self.isChecked];
and this would call that method on the class spawning the checkboxes/delegate.
Hope this is extensive enough.
Tim