NSArray中的資料進行排序

nsarray中的資料排序，經常是利用nssortdescriptor。

//組裝資料

array=[[nsmutablearray alloc] initwithcapacity:11];

nsmutabledictionary *dir6=[[nsmutabledictionary alloc] initwithcapacity:1];

[dir6 setobject:@"曹磊" forkey:@"friendname"];

[dir6 setobject:@"曹磊" forkey:@"friendid"];

[array addobject:dir6];

[dir6 release];

nsmutabledictionary *dir=[[nsmutabledictionary alloc] initwithcapacity:1];

[dir setobject:@"王軍" forkey:@"friendname"];

[dir setobject:@"曹磊" forkey:@"friendid"];

[array addobject:dir];

[dir release];

nsmutabledictionary *dir1=[[nsmutabledictionary alloc] initwithcapacity:1];

[dir1 setobject:@"111" forkey:@"friendname"];

[dir1 setobject:@"曹磊" forkey:@"friendid"];

[array addobject:dir1];

[dir1 release];

nsmutabledictionary *dir2=[[nsmutabledictionary alloc] initwithcapacity:1];

[dir2 setobject:@"王興朝" forkey:@"friendname"];

[dir2 setobject:@"曹磊" forkey:@"friendid"];

[array addobject:dir2];

[dir2 release];

nsmutabledictionary *dir3=[[nsmutabledictionary alloc] initwithcapacity:1];

[dir3 setobject:@"wangjun" forkey:@"friendname"];

[dir3 setobject:@"曹磊" forkey:@"friendid"];

[array addobject:dir3];

[dir3 release];

nsmutabledictionary *dir4=[[nsmutabledictionary alloc] initwithcapacity:1];

[dir4 setobject:@"apk" forkey:@"friendname"];

[dir4 setobject:@"曹磊" forkey:@"friendid"];

[array addobject:dir4];

[dir4 release];

self.myarray=array;

[array release];

nslog(@">>>>>>排序前》");

for (int i=0; i<[self.myarray count]; i++)

nssortdescriptor *sorter = [[nssortdescriptor alloc] initwithkey:@"friendname" ascending:yes];

nsarray *sortdescriptors = [[nsarray alloc] initwithobjects:&sorter count:1];

nsarray *sortedarray = [self.myarray sortedarrayusingdescriptors:sortdescriptors];

[sorter release];

nslog(@"\n\n\n\n\n>>>>>>排序後》");

for (int i=0; i<[sortedarray count]; i++)

資料結果：

2011-04-21 18:31:36.556 sort[4041:707] >>>>>>排序前》

2011-04-21 18:31:36.567 sort[4041:707] 曹磊

2011-04-21 18:31:36.571 sort[4041:707] 王軍

2011-04-21 18:31:36.575 sort[4041:707] 111

2011-04-21 18:31:36.578 sort[4041:707] 王興朝

2011-04-21 18:31:36.582 sort[4041:707] wangjun

2011-04-21 18:31:36.585 sort[4041:707] apk

2011-04-21 18:31:36.589 sort[4041:707]

>>>>>>排序後》

2011-04-21 18:31:36.595 sort[4041:707] 111

2011-04-21 18:31:36.599 sort[4041:707] apk

2011-04-21 18:31:36.602 sort[4041:707] wangjun

2011-04-21 18:31:36.606 sort[4041:707] 曹磊

2011-04-21 18:31:36.610 sort[4041:707] 王興朝

2011-04-21 18:31:36.613 sort[4041:707] 王軍

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