我们先实现单个按钮，为了复用，不管单选还是复选按钮都是使用同一个类来实现，为了区别单选还是复选，我们用一个自定义枚举类型CheckButtonStyle属性style来区别，当其值设置为CheckButtonStyleDefault或CheckButtonStyleBox时，为复选按钮：
当其值设为CheckButtonStyleRadio时，为单选按钮：
当按钮在选中／反选状态间切换时,文字左边的图片自动转换。
整个控件是由一个ImageView、一个Label、一个BOOL变量及其他变量组成，.h文件如下：
typedef
enum
{
CheckButtonStyleDefault
= 0
,
CheckButtonStyleBox
= 1
,
CheckButtonStyleRadio
= 2
} CheckButtonStyle;
#import
<Foundation/Foundation.h>
@interface
CheckButton : UIControl {
//UIControl* control;
UILabel
* label
;
UIImageView
* icon
;
BOOL
checked
;
id
value
,
delegate
;
CheckButtonStyle
style
;
NSString
*
checkname
,*
uncheckname
;
//
勾选／反选时的图片文件名
}
@property
(
retain
,
nonatomic
)
id
value,delegate;
@property
(
retain
,
nonatomic
)UILabel* label;
@property
(
retain
,
nonatomic
)UIImageView* icon;
@property
(
assign
)CheckButtonStyle style;
-(
CheckButtonStyle
)style;
-(
void
)setStyle:(
CheckButtonStyle
)st;
-(
BOOL
)isChecked;
-(
void
)setChecked:(
BOOL
)b;
@end
具体实现如下：
#import
"CheckButton.h"
@implementation
CheckButton
@synthesize
label,icon,value,delegate;
-(
id
)initWithFrame:(
CGRect
)
frame
{
if
(
self
=[
super
initWithFrame
:
frame
]) {
icon
=[[
UIImageView
alloc
]
initWithFrame
:
CGRectMake
(
10
, 0
, frame
.
size
.
height
, frame
.
size
.
height
)];
[
self
setStyle
:
CheckButtonStyleDefault
];
//
默认风格为方框（多选）样式
//self.backgroundColor=[UIColor
grayColor];
[
self
addSubview
:
icon
];
label
=[[
UILabel
alloc
]
initWithFrame
:
CGRectMake
(
icon
.
frame
.
size
.
width
+
24
, 0
,
frame
.
size
.
width
-
icon
.
frame
.
size
.
width
-
24
,
frame
.
size
.
height
)];
label
.
backgroundColor
=[
UIColor
clearColor
];
label
.
font
=[
UIFont
fontWithName
:
@"Arial"
size
:
20
];
label
.
textColor
=[
UIColor
colorWithRed
:
0xf9
/
255.0
green
:
0xd8
/
255.0
blue
:
0x67
/
255.0
alpha
:
1
];
label
.
textAlignment
=
UITextAlignmentLeft
;
[
self
addSubview
:
label
];
[
self
addTarget
:
self
action
:
@selector
(
clicked
) forControlEvents
:
UIControlEventTouchUpInside
];
}
return
self
;
}
-(
CheckButtonStyle
)style{
return
style
;
}
-(
void
)setStyle:(
CheckButtonStyle
)st{
style
=st;
switch
(
style
) {
case
CheckButtonStyleDefault
:
case
CheckButtonStyleBox
:
checkname
=
@"checked.png"
;
uncheckname
=
@"unchecked.png"
;
break
;
case
CheckButtonStyleRadio
:
checkname
=
@"radio.png"
;
uncheckname
=
@"unradio.png"
;
break
;
default
:
break
;
}
[
self
setChecked
:
checked
];
}
-(
BOOL
)isChecked{
return
checked
;
}
-(
void
)setChecked:(
BOOL
)b{
if
(b!=
checked
){
checked
=b;
}
if
(
checked
) {
[
icon
setImage
:[
UIImage
imageNamed
:
checkname
]];
}
else
{
[
icon
setImage
:[
UIImage
imageNamed
:
uncheckname
]];
}
}
-(
void
)clicked{
[
self
setChecked
:!
checked
];
if
(
delegate
!=
nil
) {
SEL
sel=
NSSelectorFromString
(
@"checkButtonClicked"
);
if
([
delegate
respondsToSelector
:sel]){
[
delegate
performSelector
:sel];
}
}
}
-(
void
)dealloc{
value
=
nil
;
delegate
=
nil
;
[
label
release
];
[
icon
release
];
[
super
dealloc
];
}
@end
使用CheckButton类很简单，构造、设置标签文本等属性，然后addSubview：
CheckButton
* cb=[[
CheckButton
a
lloc
] initWithFrame
:
CGRectMake
(
20
, 60
, 260
, 32
)];
cb.
label
.
text
=
@"checkbutton1"
;
cb.
value
=[[
NSNumber
alloc
]
initWithInt
:
18
];
cb.
style
=