object-c NSArray排序转载
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object-c NSArray排序转载
1.升序排列
NSArray *_firstArray = [NSArray arrayWithObjects:@"ccccc",@"bbbbb",@"ddddd",@"aaaaa",nil];
NSArray *_sortedArray= [_firstArray sortedArrayUsingSelector:@selector(compare:)];
NSLog(@"未排序:%@",_firstArray);
NSLog(@"排行后:%@",_sortedArray);
结果:
2012-03-19 23:17:06.748 IOSSortArray[1761:f803] 未排序:(
ccccc,
bbbbb,
ddddd,
aaaaa
)
2012-03-19 23:17:06.749 IOSSortArray[1761:f803] 排行后:(
aaaaa,
bbbbb,
ccccc,
ddddd
)
2.降序排列
NSMutableArray *_reSortArray= [[NSMutableArray alloc] init];
for (id _obj in [_sortedArray reverseObjectEnumerator]) {
[_reSortArray addObject:_obj];
}
NSLog(@"降序排列:%@",_reSortArray);
[_reSortArray release];
结果:
2012-03-19 23:27:20.789 IOSSortArray[2011:f803] 排行后:(
aaaaa,
bbbbb,
ccccc,
ddddd
)
2012-03-19 23:27:20.790 IOSSortArray[2011:f803] 降序排列:(
ddddd,
ccccc,
bbbbb,
aaaaa
)
3.数组里的字典排序(NSDirector排序)
NSMutableArray *_mutiArray = [[NSMutableArray alloc] init];
[_mutiArray addObject:[NSDictionary dictionaryWithObjectsAndKeys:@"rainbird",@"name",@"ddabc",@"work", nil]];
[_mutiArray addObject:[NSDictionary dictionaryWithObjectsAndKeys:@"ainbird",@"name",@"ccabc",@"work", nil]];
[_mutiArray addObject:[NSDictionary dictionaryWithObjectsAndKeys:@"inbird",@"name",@"fdabc",@"work", nil]];
[_mutiArray addObject:[NSDictionary dictionaryWithObjectsAndKeys:@"bird",@"name",@"agbc",@"work", nil]];
[_mutiArray addObject:[NSDictionary dictionaryWithObjectsAndKeys:@"rd",@"name",@"abac",@"work", nil]];
NSSortDescriptor *_sorter = [[NSSortDescriptor alloc] initWithKey:@"name"
ascending:YES];
NSSortDescriptor *_sorter2 = [[NSSortDescriptor alloc] initWithKey:@"work"
ascending:YES];
NSLog(@"未排序:\n%@",_mutiArray);
NSLog(@"根据name排序:\n%@",[_mutiArray sortedArrayUsingDescriptors:[NSArray arrayWithObjects:_sorter, nil]]);
NSLog(@"根据work排序:\n%@",[_mutiArray sortedArrayUsingDescriptors:[NSArray arrayWithObjects:_sorter2, nil]]);
[_mutiArray release];
[_sorter release];
[_sorter2 release];
结果:
2012-03-19 23:34:37.489 IOSSortArray[2119:f803] 未排序:
(
{
name = rainbird;
work = ddabc;
},
{
name = ainbird;
work = ccabc;
},
{
name = inbird;
work = fdabc;
},
{
name = bird;
work = agbc;
},
{
name = rd;
work = abac;
}
)
2012-03-19 23:34:37.490 IOSSortArray[2119:f803] 根据name排序:
(
{
name = ainbird;
work = ccabc;
},
{
name = bird;
work = agbc;
},
{
name = inbird;
work = fdabc;
},
{
name = rainbird;
work = ddabc;
},
{
name = rd;
work = abac;
}
)
2012-03-19 23:34:37.491 IOSSortArray[2119:f803] 根据work排序:
(
{
name = rd;
work = abac;
},
{
name = bird;
work = agbc;
},
{
name = ainbird;
work = ccabc;
},
{
name = rainbird;
work = ddabc;
},
{
name = inbird;
work = fdabc;
}
)
*****************
sortedArrayUsingSelector:@selector(caseInsensitiveCompare:) //不区分大小排序
1.升序排列
NSArray *_firstArray = [NSArray arrayWithObjects:@"ccccc",@"bbbbb",@"ddddd",@"aaaaa",nil];
NSArray *_sortedArray= [_firstArray sortedArrayUsingSelector:@selector(compare:)];
NSLog(@"未排序:%@",_firstArray);
NSLog(@"排行后:%@",_sortedArray);
结果:
2012-03-19 23:17:06.748 IOSSortArray[1761:f803] 未排序:(
ccccc,
bbbbb,
ddddd,
aaaaa
)
2012-03-19 23:17:06.749 IOSSortArray[1761:f803] 排行后:(
aaaaa,
bbbbb,
ccccc,
ddddd
)
2.降序排列
NSMutableArray *_reSortArray= [[NSMutableArray alloc] init];
for (id _obj in [_sortedArray reverseObjectEnumerator]) {
[_reSortArray addObject:_obj];
}
NSLog(@"降序排列:%@",_reSortArray);
[_reSortArray release];
结果:
2012-03-19 23:27:20.789 IOSSortArray[2011:f803] 排行后:(
aaaaa,
bbbbb,
ccccc,
ddddd
)
2012-03-19 23:27:20.790 IOSSortArray[2011:f803] 降序排列:(
ddddd,
ccccc,
bbbbb,
aaaaa
)
3.数组里的字典排序(NSDirector排序)
NSMutableArray *_mutiArray = [[NSMutableArray alloc] init];
[_mutiArray addObject:[NSDictionary dictionaryWithObjectsAndKeys:@"rainbird",@"name",@"ddabc",@"work", nil]];
[_mutiArray addObject:[NSDictionary dictionaryWithObjectsAndKeys:@"ainbird",@"name",@"ccabc",@"work", nil]];
[_mutiArray addObject:[NSDictionary dictionaryWithObjectsAndKeys:@"inbird",@"name",@"fdabc",@"work", nil]];
[_mutiArray addObject:[NSDictionary dictionaryWithObjectsAndKeys:@"bird",@"name",@"agbc",@"work", nil]];
[_mutiArray addObject:[NSDictionary dictionaryWithObjectsAndKeys:@"rd",@"name",@"abac",@"work", nil]];
NSSortDescriptor *_sorter = [[NSSortDescriptor alloc] initWithKey:@"name"
ascending:YES];
NSSortDescriptor *_sorter2 = [[NSSortDescriptor alloc] initWithKey:@"work"
ascending:YES];
NSLog(@"未排序:\n%@",_mutiArray);
NSLog(@"根据name排序:\n%@",[_mutiArray sortedArrayUsingDescriptors:[NSArray arrayWithObjects:_sorter, nil]]);
NSLog(@"根据work排序:\n%@",[_mutiArray sortedArrayUsingDescriptors:[NSArray arrayWithObjects:_sorter2, nil]]);
[_mutiArray release];
[_sorter release];
[_sorter2 release];
结果:
2012-03-19 23:34:37.489 IOSSortArray[2119:f803] 未排序:
(
{
name = rainbird;
work = ddabc;
},
{
name = ainbird;
work = ccabc;
},
{
name = inbird;
work = fdabc;
},
{
name = bird;
work = agbc;
},
{
name = rd;
work = abac;
}
)
2012-03-19 23:34:37.490 IOSSortArray[2119:f803] 根据name排序:
(
{
name = ainbird;
work = ccabc;
},
{
name = bird;
work = agbc;
},
{
name = inbird;
work = fdabc;
},
{
name = rainbird;
work = ddabc;
},
{
name = rd;
work = abac;
}
)
2012-03-19 23:34:37.491 IOSSortArray[2119:f803] 根据work排序:
(
{
name = rd;
work = abac;
},
{
name = bird;
work = agbc;
},
{
name = ainbird;
work = ccabc;
},
{
name = rainbird;
work = ddabc;
},
{
name = inbird;
work = fdabc;
}
)
*****************
sortedArrayUsingSelector:@selector(caseInsensitiveCompare:) //不区分大小排序
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