ios本身沒有系統(tǒng)的checkbox組件，但是實際開發(fā)中會經(jīng)常用到，所以專門寫了一個checkbox控件，直接上代碼

效果圖：

名單

uicheckboxbutton.h文件如下：

#import

#import common.h

@interface 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文件如下：

#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];

更多信息請查看IT技術(shù)專欄