ios本身沒有系統的checkbox元件，但是實際開發中會經常用到，所以專門寫了乙個checkbox控制項，直接上**
效果圖：
uicheckboxbutton.h檔案如下：
#import
#import "common.h"
@inte***ce uicheckboxbutton : uicontrol
uilabel *label;
uiimageview *icon;
bool checked;
id delegate;
@property (retain, nonatomic) id delegate;
@property (retain, nonatomic) uilabel *label;
@property (retain, nonatomic) uiimageview *icon;
-(bool)ischecked;
-(void)setchecked: (bool)flag;
@end
uicheckboxbutton.m檔案如下：
#import "uicheckboxbutton.h"
@implementation uicheckboxbutton
@synthesize label,icon,delegate;
- (id)initwithframe:(cgrect)frame {
if ( self = [super initwithframe: frame])
icon =[[uiimageview alloc] initwithframe: cgrectmake (0, 0, frame.size.height, frame.size.height)];
[self setchecked:no];
[self addsubview: icon];
label =[[uilabel alloc] initwithframe: cgrectmake(icon.frame.size.width + 7, 0,
frame.size.width - icon.frame.size.width - 10,
frame.size.height)];
label.backgroundcolor =[uicolor clearcolor];
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：
uicheckboxbutton *checkboxbutton = [[ uicheckboxbutton alloc] initwithframe: cgrectmake(30, 50, 220, 25)];
checkboxbutton.delegate = self.delegate;
checkboxbutton.label.text = [common gettextbytag:@"nocostprompt"];
checkboxbutton.label.textcolor = [common getcolorbytag:@"alertlabelcolor"];
[self.view addsubview:checkboxbutton];
[checkboxbutton release];
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