IOS开发(2)

        label.textAlignment = UITextAlignmentLeft;   
        [self addSubview:label];   
        [self addTarget:self action:@selector(clicked) forControlEvents: UIControlEventTouchUpInside];   
    }       
    return self;   
} 
 
-(BOOL)isChecked {   
    return checked;   
}   
-(void)setChecked: (BOOL)flag {   
    if (flag != checked)   
    {    
        checked = flag;   
    }       
    if (checked)    
    {   
        [icon setImage: [UIImage imageNamed:@"checkBoxSelect.png"]];    
    }    
    else   
    {   
        [icon setImage: [UIImage imageNamed:@"checkBoxNoSelect.png"]];   
    }   
}   
-(void)clicked {   
    [self setChecked: !checked];       
    if (delegate != nil)    
    {   
        SEL sel = NSSelectorFromString (@"checkButtonClicked");          
        if ([delegate respondsToSelector: sel])   
        {   
            [delegate performSelector: sel];   
        } 
    }   
     
}   
-(void)dealloc {   
    delegate = nil;   
    [label release];   
    [icon release];   
    [super dealloc];   
}   
@end 

使用方法：
[html]  www.2cto.com
UICheckBoxButton *checkBoxButton = [[ UICheckBoxButton alloc] initWithFrame: CGRectMake(30, 50, 220, 25)]; 
        checkBoxButton.delegate = self.delegate; 
        checkBoxButton.label.text = [Common getTextByTag:@"noCostPrompt"];