iOS开发中常用类目
1.NSDateFomatter
|
1
2
3
4
5
6
7
8
|
@interface
NSDateFormatter
(
MyCategory
)
+
(
id
)
dateFormatter
;
+
(
id
)
dateFormatterWithFormat
:
(
NSString
*
)
dateFormat
;
+
(
id
)
defaultDateFormatter
;
@end
|
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
|
@implementation
NSDateFormatter
(
MyCategory
)
+
(
id
)
dateFormatter
{
return
[
[
self
alloc
]
init
]
;
}
+
(
id
)
dateFormatterWithFormat
:
(
NSString
*
)
dateFormat
{
NSDateFormatter
*
dateFormatter
=
[
[
self
alloc
]
init
]
;
dateFormatter
.
dateFormat
=
dateFormat
;
return
dateFormatter
;
}
+
(
id
)
defaultDateFormatter
{
return
[
self
dateFormatterWithFormat
:
@
"yyyy-MM-dd HH:mm:ss"
]
;
}
@end
|
2.NSDate
|
1
2
3
4
5
6
7
|
@interface
NSDate
(
MyCategory
)
-
(
NSString
*
)
timeIntervalDescription
;
//距离当前的时间间隔
-
(
NSString
*
)
minuteDescription
;
//精确到分钟的日期
-
(
NSString
*
)
formattedDateDescription
;
//格式化日期
@end
|
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
|
@implementation
NSDate
(
MyCategory
)
-
(
NSString
*
)
timeIntervalDescription
{
NSTimeInterval
timeInterval
=
-
[
self
timeIntervalSinceNow
]
;
if
(
timeInterval
<
60
)
{
return
@"1分钟内"
;
}
else
if
(
timeInterval
<
3600
)
{
return
[
NSString
stringWithFormat
:
@"%.f分钟前"
,
timeInterval
/
60
]
;
}
else
if
(
timeInterval
<
86400
)
{
return
[
NSString
stringWithFormat
:
@"%.f小时前"
,
timeInterval
/
3600
]
;
}
else
if
(
timeInterval
<
2592000
)
{
//30天内
return
[
NSString
stringWithFormat
:
@"%.f天前"
,
timeInterval
/
86400
]
;
}
else
if
(
timeInterval
<
31536000
)
{
//30天至1年内
NSDateFormatter
*dateFormatter
=
[
NSDateFormatter
dateFormatterWithFormat
:
@"M月d日"
]
;
return
[
dateFormatter
stringFromDate
:self
]
;
}
else
{
return
[
NSString
stringWithFormat
:
@"%.f年前"
,
timeInterval
/
31536000
]
;
}
}
-
(
NSString
*
)
minuteDescription
{
NSDateFormatter
*dateFormatter
=
[
NSDateFormatter
dateFormatterWithFormat
:
@"yyyy-MM-dd"
]
;
NSString
*theDay
=
[
dateFormatter
stringFromDate
:self
]
;
//日期的年月日
NSString
*currentDay
=
[
dateFormatter
stringFromDate
:
[
NSDate
date
]
]
;
//当前年月日
if
(
[
theDay
isEqualToString
:currentDay
]
)
{
//当天
[
dateFormatter
setDateFormat
:
@"ah:mm"
]
;
return
[
dateFormatter
stringFromDate
:self
]
;
}
else
if
(
[
[
dateFormatter
dateFromString
:currentDay
]
timeIntervalSinceDate
:
[
dateFormatter
dateFromString
:theDay
]
]
==
86400
)
{
//昨天
[
dateFormatter
setDateFormat
:
@"ah:mm"
]
;
return
[
NSString
stringWithFormat
:
@"昨天 %@"
,
[
dateFormatter
stringFromDate
:self
]
]
;
}
else
if
(
[
[
dateFormatter
dateFromString
:currentDay
]
timeIntervalSinceDate
:
[
dateFormatter
dateFromString
:theDay
]
]
<
86400
*
7
)
{
//间隔一周内
[
dateFormatter
setDateFormat
:
@"EEEE ah:mm"
]
;
return
[
dateFormatter
stringFromDate
:self
]
;
}
else
{
//以前
[
dateFormatter
setDateFormat
:
@"yyyy-MM-dd ah:mm"
]
;
return
[
dateFormatter
stringFromDate
:self
]
;
}
}
-
(
NSString
*
)
formattedDateDescription
{
NSDateFormatter
*dateFormatter
=
[
[
NSDateFormatter
alloc
]
init
]
;
[
dateFormatter
setDateFormat
:
@"yyyy-MM-dd"
]
;
NSString
*theDay
=
[
dateFormatter
stringFromDate
:self
]
;
//日期的年月日
NSString
*currentDay
=
[
dateFormatter
stringFromDate
:
[
NSDate
date
]
]
;
//当前年月日
NSInteger
timeInterval
=
-
[
self
timeIntervalSinceNow
]
;
if
(
timeInterval
<
60
)
{
return
@"1分钟内"
;
}
else
if
(
timeInterval
<
3600
)
{
//1小时内
return
[
NSString
stringWithFormat
:
@"%d分钟前"
,
timeInterval
/
60
]
;
}
else
if
(
timeInterval
<
21600
)
{
//6小时内
return
[
NSString
stringWithFormat
:
@"%d小时前"
,
timeInterval
/
3600
]
;
}
else
if
(
[
theDay
isEqualToString
:currentDay
]
)
{
//当天
[
dateFormatter
setDateFormat
:
@"HH:mm"
]
;
return
[
NSString
stringWithFormat
:
@"今天 %@"
,
[
dateFormatter
stringFromDate
:self
]
]
;
}
else
if
(
[
[
dateFormatter
dateFromString
:currentDay
]
timeIntervalSinceDate
:
[
dateFormatter
dateFromString
:theDay
]
]
==
86400
)
{
//昨天
[
dateFormatter
setDateFormat
:
@"HH:mm"
]
;
return
[
NSString
stringWithFormat
:
@"昨天 %@"
,
[
dateFormatter
stringFromDate
:self
]
]
;
}
else
{
//以前
[
dateFormatter
setDateFormat
:
@"MM-dd HH:mm"
]
;
return
[
dateFormatter
stringFromDate
:self
]
;
}
}
@end
|
3.UIColor
|
1
2
3
4
5
|
@interface
UIColor
(
MyCategory
)
+
(
UIColor
*
)
colorWithHexRGB
:
(
NSString
*
)
hexRGBString
;
@end
|
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
|
@implementation
UIColor
(
MyCategory
)
/*由16进制字符串获取颜色*/
+
(
UIColor
*
)
colorWithHexRGB
:
(
NSString
*
)
hexRGBString
{
if
(
[
hexRGBString
hasPrefix
:
@"#"
]
)
{
hexRGBString
=
[
hexRGBString
substringFromIndex
:
1
]
;
}
unsigned
int
colorCode
=
0
;
unsigned
char
redByte
,
greenByte
,
blueByte
;
if
(
hexRGBString
)
{
NSScanner
*scanner
=
[
NSScanner
scannerWithString
:hexRGBString
]
;
[
scanner
scanHexInt
:
&
colorCode
]
;
}
redByte
=
(
unsigned
char
)
(
colorCode
>>
16
)
;
greenByte
=
(
unsigned
char
)
(
colorCode
>>
8
)
;
blueByte
=
(
unsigned
char
)
(
colorCode
)
;
// masks off high bits
return
[
UIColor
colorWithRed
:
(
float
)
redByte
/
0xff
green
:
(
float
)
greenByte
/
0xff
blue
:
(
float
)
blueByte
/
0xff
alpha
:
1.0
]
;
}
@end
|
4.UIImage
|
1
2
3
4
5
6
7
8
9
10
11
12
13
|
@interface
UIImage
(
MyCategory
)
//图片拉伸、平铺接口
-
(
UIImage
*
)
resizableImageWithCompatibleCapInsets
:
(
UIEdgeInsets
)
capInsets
resizingMode
:
(
UIImageResizingMode
)
resizingMode
;
//图片以ScaleToFit方式拉伸后的CGSize
-
(
CGSize
)
sizeOfScaleToFit
:
(
CGSize
)
scaledSize
;
//将图片转向调整为向上
-
(
UIImage
*
)
fixOrientation
;
//以ScaleToFit方式压缩图片
-
(
UIImage
*
)
compressedImageWithSize
:
(
CGSize
)
compressedSize
;
@end
|
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
|
@implementation
UIImage
(
MyCategory
)
/*获取当前主题包的指定图片*/
+
(
UIImage
*
)
themeImageNamed
:
(
NSString
*
)
name
{
NSUInteger
themeID
=
[
[
ViewManager
defaultManager
]
themeID
]
;
if
(
themeID
==
0
)
{
//默认主题
NSString
*fileName
=
[
NSString
stringWithFormat
:
@"Lianxi.bundle/Images/%@"
,
name
]
;
return
[
self
imageNamed
:fileName
]
;
}
else
{
//下载主题
return
nil
;
}
}
/*图片拉伸、平铺接口，兼容iOS5+*/
-
(
UIImage
*
)
resizableImageWithCompatibleCapInsets
:
(
UIEdgeInsets
)
capInsets
resizingMode
:
(
UIImageResizingMode
)
resizingMode
{
CGFloat
version
=
[
[
[
UIDevice
currentDevice
]
systemVersion
]
floatValue
]
;
if
(
version
>=
6.0
)
{
return
[
self
resizableImageWithCapInsets
:capInsets
resizingMode
:resizingMode
]
;
}
else
if
(
version
>=
5.0
)
{
if
(
resizingMode
==
UIImageResizingModeStretch
)
{
return
[
self
stretchableImageWithLeftCapWidth
:capInsets
.
left
topCapHeight
:capInsets
.
top
]
;
}
else
{
//UIImageResizingModeTile
return
[
self
resizableImageWithCapInsets
:capInsets
]
;
}
}
else
{
return
[
self
stretchableImageWithLeftCapWidth
:capInsets
.
left
topCapHeight
:capInsets
.
top
]
;
}
}
/*图片以ScaleToFit方式拉伸后的CGSize*/
-
(
CGSize
)
sizeOfScaleToFit
:
(
CGSize
)
scaledSize
{
CGFloat
scaleFactor
=
scaledSize
.
width
/
scaledSize
.
height
;
CGFloat
imageFactor
=
self
.
size
.
width
/
self
.
size
.
height
;
if
(
scaleFactor
<=
imageFactor
)
{
//图片横向填充
return
CGSizeMake
(
scaledSize
.
width
,
scaledSize
.
width
/
imageFactor
)
;
}
else
{
//纵向填充
return
CGSizeMake
(
scaledSize
.
height
*
imageFactor
,
scaledSize
.
height
)
;
}
}
/*将图片转向调整为向上*/
-
(
UIImage
*
)
fixOrientation
{
if
(
self
.
imageOrientation
==
UIImageOrientationUp
)
{
return
self
;
}
UIGraphicsBeginImageContextWithOptions
(
self
.
size
,
NO
,
self
.
scale
)
;
[
self
drawInRect
:CGRectMake
(
0.0
,
0.0
,
self
.
size
.
width
,
self
.
size
.
height
)
]
;
UIImage
*fixedImage
=
UIGraphicsGetImageFromCurrentImageContext
(
)
;
UIGraphicsEndImageContext
(
)
;
return
fixedImage
;
}
/*以ScaleToFit方式压缩图片*/
-
(
UIImage
*
)
compressedImageWithSize
:
(
CGSize
)
compressedSize
{
if
(
CGSizeEqualToSize
(
self
.
size
,
CGSizeZero
)
||
(
self
.
size
.
width
<=
compressedSize
.
width
&&
self
.
size
.
height
<=
compressedSize
.
height
)
)
{
//不用压缩
return
self
;
}
CGSize
scaledSize
=
[
self
sizeOfScaleToFit
:compressedSize
]
;
//压缩大小，调整转向
UIGraphicsBeginImageContext
(
scaledSize
)
;
[
self
drawInRect
:CGRectMake
(
0.0
,
0.0
,
scaledSize
.
width
,
scaledSize
.
height
)
]
;
UIImage
*compressedImage
=
UIGraphicsGetImageFromCurrentImageContext
(
)
;
UIGraphicsEndImageContext
(
)
;
return
compressedImage
;
}
@end
|
5.UIView
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
|
@interface
UIView
(
MyCategory
)
-
(
void
)
startShakeAnimation
;
//摇动动画
-
(
void
)
stopShakeAnimation
;
-
(
void
)
startRotateAnimation
;
//360°旋转动画
-
(
void
)
stopRotateAnimation
;
///截图
-
(
UIImage
*
)
screenshot
;
@property
(
nonatomic
)
float
top
;
@property
(
nonatomic
)
float
bottom
;
@property
(
nonatomic
)
float
left
;
@property
(
nonatomic
)
float
right
;
@end
|
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
|
@implementation
UIView
(
MyCategory
)
/*截图*/
-
(
UIImage
*
)
screenshot
{
UIGraphicsBeginImageContextWithOptions
(
self
.
frame
.
size
,
NO
,
2.0
)
;
[
self
.
layer
renderInContext
:UIGraphicsGetCurrentContext
(
)
]
;
UIImage
*image
=
UIGraphicsGetImageFromCurrentImageContext
(
)
;
UIGraphicsEndImageContext
(
)
;
return
image
;
}
#pragma mark - Animation
-
(
void
)
startShakeAnimation
{
CGFloat
rotation
=
0.05
;
CABasicAnimation
*shake
=
[
CABasicAnimation
animationWithKeyPath
:
@"transform"
]
;
shake
.
duration
=
0.2
;
shake
.
autoreverses
=
YES
;
shake
.
repeatCount
=
MAXFLOAT
;
shake
.
removedOnCompletion
=
NO
;
shake
.
fromValue
=
[
NSValue
valueWithCATransform3D
:CATransform3DRotate
(
self
.
layer
.
transform
,
-
rotation
,
0.0
,
0.0
,
1.0
)
]
;
shake
.
toValue
=
[
NSValue
valueWithCATransform3D
:CATransform3DRotate
(
self
.
layer
.
transform
,
rotation
,
0.0
,
0.0
,
1.0
)
]
;
[
self
.
layer
addAnimation
:shake
forKey
:
@"shakeAnimation"
]
;
}
-
(
void
)
stopShakeAnimation
{
[
self
.
layer
removeAnimationForKey
:
@"shakeAnimation"
]
;
}
-
(
void
)
startRotateAnimation
{
CABasicAnimation
*shake
=
[
CABasicAnimation
animationWithKeyPath
:
@"transform"
]
;
shake
.
duration
=
0.5
;
shake
.
autoreverses
=
NO
;
shake
.
repeatCount
=
MAXFLOAT
;
shake
.
removedOnCompletion
=
NO
;
shake
.
fromValue
=
[
NSValue
valueWithCATransform3D
:CATransform3DRotate
(
self
.
layer
.
transform
,
M_PI
,
0.0
,
0.0
,
1.0
)
]
;
shake
.
toValue
=
[
NSValue
valueWithCATransform3D
:CATransform3DRotate
(
self
.
layer
.
transform
,
0.0
,
0.0
,
0.0
,
1.0
)
]
;
[
self
.
layer
addAnimation
:shake
forKey
:
@"rotateAnimation"
]
;
}
-
(
void
)
stopRotateAnimation
{
[
self
.
layer
removeAnimationForKey
:
@"rotateAnimation"
]
;
}
-
(
float
)
top
{
return
self
.
frame
.
origin
.
x
;
}
-
(
float
)
bottom
{
return
self
.
top
+
self
.
frame
.
size
.
height
;
}
-
(
float
)
left
{
return
self
.
frame
.
origin
.
x
;
}
-
(
float
)
right
{
return
self
.
left
+
self
.
frame
.
size
.
width
;
}
@end
|