iphone开发之数组排序

最新推荐文章于 2025-08-08 14:49:07 发布

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本文详细介绍了如何根据CompanyIco、TVoucherId和VName字段对数组进行排序，并提供了相应的排序方法实现。此外，还展示了两种排序方法：一种是通过自定义排序函数实现，另一种则是使用NSSortDescriptor类进行排序。

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有一个这样的数组

(

{CompanyIco = "159.jpg";TVoucherId = 197;VName = "bob";},

{CompanyIco = "005.jpg";TVoucherId = 203;VName = "jane";},

{CompanyIco = "445.jpg";TVoucherId = 198;VName = "jay";},

{CompanyIco = "652.jpg";TVoucherId = 199;VName = "smith";},

{CompanyIco = "001.jpg";TVoucherId = 234;VName = "tom";}

)

根据 CompanyIco排序

(

{CompanyIco = "001.jpg";TVoucherId = 234;VName = "tom";},

{CompanyIco = "005.jpg";TVoucherId = 203;VName = "jane";},

{CompanyIco = "159.jpg";TVoucherId = 197;VName = "bob";},

{CompanyIco = "445.jpg";TVoucherId = 198;VName = "jay";},

{CompanyIco = "652.jpg";TVoucherId = 199;VName = "smith";}

)

根据TVoucherId排序

(

{CompanyIco = "159.jpg";TVoucherId = 197;VName = "bob";},

{CompanyIco = "445.jpg";TVoucherId = 198;VName = "jay";},

{CompanyIco = "652.jpg";TVoucherId = 199;VName = "smith";},

{CompanyIco = "005.jpg";TVoucherId = 203;VName = "jane";},

{CompanyIco = "001.jpg";TVoucherId = 234;VName = "tom";}

)

根据VName排序

(

{CompanyIco = "159.jpg";TVoucherId = 197;VName = "bob";},

{CompanyIco = "005.jpg";TVoucherId = 203;VName = "jane";},

{CompanyIco = "445.jpg";TVoucherId = 198;VName = "jay";},

{CompanyIco = "652.jpg";TVoucherId = 199;VName = "smith";},

{CompanyIco = "001.jpg";TVoucherId = 234;VName = "tom";}

)

排序的方法 the num.1

-(void)sortArray:(NSString *)sortType{

//make the call to sort the array using the function called alphabeticHometownSort

int reverseSort = NO;

if ([sortType isEqualToString:@"Company"])

[myMutableArray sortUsingFunction:alphabeticCompanySort context:&reverseSort];

else if ([sortType isEqualToString:@"TVoucherId"])

[myMutableArray sortUsingFunction:alphabeticTVoucherIdSort context:&reverseSort];

else if ([sortType isEqualToString:@"VName"])

[myMutableArray sortUsingFunction:alphabeticVNameSort context:&reverseSort]; }

/////////////////////////////////////

NSInteger alphabeticTVoucherIdSort(yourObject *obj1, yourObject *obj2, void *reverse)

{

if ((NSInteger *)reverse == NO)

return [[obj2 TVoucherId] localizedCaseInsensitiveCompare:[obj1 TVoucherId]];

else

return [[obj1 TVoucherId] localizedCaseInsensitiveCompare:[obj2 TVoucherId]];

}

/////////////////////////////////////

NSInteger alphabeticCompanySort(yourObject *obj1, yourObject *obj2, void *reverse)

{

if ((NSInteger *)reverse == NO)

return [[obj2 Company] localizedCaseInsensitiveCompare:[obj1 Company]];

else

return [[obj1 Company] localizedCaseInsensitiveCompare:[obj2 Company]];

}

/////////////////////////////////////

NSInteger alphabeticVNameSort(yourObject *obj1, yourObject *obj2, void *reverse)

{

//Be careful here. These are sorted alphabetically so 2 will come after 12.

//Im sure there is a replacement call for localizedCaseInsensitiveCompare that

//deals with Integers, but I am not sure what it is offhand.

if ((NSInteger *)reverse == NO)

return [[obj2 VName] localizedCaseInsensitiveCompare:[obj1 VName]];

else

return [[obj1 VName] localizedCaseInsensitiveCompare:[obj2 VName]];

}

排序的方法 the num.2

NSSortDescriptor *alphaDesc = [[NSSortDescriptor alloc] initWithKey:@"TVoucherId" ascending:YES selector:@selector(localizedCaseInsensitiveCompare:)]; 
[myArray sortUsingDescriptors:[NSMutableArray arrayWithObjects:alphaDesc, nil]]; 
[alphaDesc release];
alphaDesc = nil;