//
// main.m
// NSRange
//
// Created by Wang Bob on 12-7-7.
// Copyright 2012年 __MyCompanyName__. All rights reserved.
//
#import <Foundation/Foundation.h>
void
print_range
(
NSRange
range
);
void
print_range
(
NSRange
range
)
{
if
(
range
.
location
!=
NSNotFound
)
NSLog
(
@"range is %@"
,
NSStringFromRange
(
range
));
// NSStringFromRange
else
NSLog
(
@"range.location not found."
);
}
int
main
(
int
argc
,
const
char
*
argv
[])
{
@
autoreleasepool
{
// 各种初始化方法
NSRange
range1
;
// 分别赋值
range1
.
location
=
18
;
range1
.
length
=
20
;
print_range
(
range1
);
// 结构初始化方法
NSRange
range2
=
{
20
,
40
};
print_range
(
range2
);
// 调用辅助的build函数
NSRange
range3
=
NSMakeRange
(
30
,
60
);
print_range
(
range3
);
// 暂时没有确定的有意义的值，可以设置成NSNotFound
NSRange
range4
=
{
NSNotFound
,
NSNotFound
};
print_range
(
range4
);
// 截取部分字符串
NSString
*
str
=
@"that is a dog."
;
NSLog
(
@"it's a %@"
,
[
str
substringWithRange
:
NSMakeRange
(
10
,
3
)]);
// 返回部分字符串的位置信息
NSRange
range
=
[
str
rangeOfString
:
@"dog"
];
if
(
range
.
length
>
0
)
print_range
(
range
);
// 反响查找
range
=
[
str
rangeOfString
:
@"a"
options
:
NSBackwardsSearch
];
if
(
range
.
length
>
0
)
print_range
(
range
);
// 从字符串构建NSRange结构体
NSLog
(
@"it's a %@"
,
[
str
substringWithRange
:
NSRangeFromString
(
@"{10, 3}"
)]);
// NSRangeFromString
// 截取数组的部分元素
NSArray
*
words
=
[
NSArray
arrayWithObjects
:
@"one"
,
@"two"
,
@"three"
,
@"four"
,
@"five"
,
nil
];
NSArray
*
subWords
=
[
words
subarrayWithRange
:
NSMakeRange
(
2
,
2
)];
for
(
NSString
*
w
in
subWords
)
NSLog
(
@"%@"
,
w
);
// 判断值是否相等
NSRange
rangeOne
=
NSMakeRange
(
1
,
10
);
NSRange
rangeTwo
=
NSMakeRange
(
1
,
10
);
if
(
NSEqualRanges
(
rangeOne
,
rangeTwo
))
NSLog
(
@"rangeOne is equal to rangeTwo"
);
// range is {3, 3}
NSRange
intersectionRange
=
NSIntersectionRange
(
NSMakeRange
(
1
,
5
),
NSMakeRange
(
3
,
8
));
print_range
(
intersectionRange
);
if
(
NSLocationInRange
(
8
,
NSMakeRange
(
5
,
20
)))
NSLog
(
@"8 in {1, 20}"
);
if
(
NSMaxRange
(
NSMakeRange
(
3
,
8
))
==
(
3
+
8
))
NSLog
(
@"NSMaxRange is sum of location and length"
);
// range is {1, 14}
print_range
(
NSUnionRange
(
NSMakeRange
(
1
,
10
),
NSMakeRange
(
5
,
10
)));
// range is {1, 20}
print_range
(
NSUnionRange
(
NSMakeRange
(
1
,
10
),
NSMakeRange
(
11
,
10
)));
}
return
0
;
}