NSMutableArray 排序

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[cpp] view
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NSMutableArray* arr = [NSMutableArrayarrayWithObjects:

[NSNumber numberWithInt:0],

[NSNumber numberWithInt:3],

[NSNumber numberWithInt:2],

[NSNumber numberWithInt:1],

[NSNumber numberWithInt:7],

[NSNumber numberWithInt:8],

[NSNumber numberWithInt:9],

[NSNumber numberWithInt:10],

[NSNumber numberWithInt:6],

[NSNumber numberWithInt:5],

[NSNumber numberWithInt:4],

nil];

// 升序

// 0 --> 10

[arr sortUsingComparator:^NSComparisonResult(__strongid obj1,__strong id obj2){

return [obj1 intValue] > [obj2intValue];

}];

NSLog(@"%@", [arrdebugDescription]);

// 降序

// 10 --> 0

[arr sortUsingComparator:^NSComparisonResult(__strongid obj1,__strong id obj2){

return [obj1 intValue] < [obj2intValue];

}];

NSLog(@"%@", [arrdebugDescription]);

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NSMutableArray* arr = [NSMutableArray arrayWithObjects:@"C", @"A", @"H", @"I", @"B", @"D", @"J", @"E", @"F", @"G", @"K", nil];

// 升序

// A --> K

[arr sortUsingComparator:^NSComparisonResult(__strong id obj1,__strong id obj2){

NSString *str1=(NSString *)obj1;

NSString *str2=(NSString *)obj2;

return [str1 compare:str2];

}];

NSLog(@"%@", [arr debugDescription]);

// 降序

// K --> A

[arr sortUsingComparator:^NSComparisonResult(__strong id obj1,__strong id obj2){

NSString *str1=(NSString *)obj1;

NSString *str2=(NSString *)obj2;

return [str2 compare:str1];

}];

NSLog(@"%@", [arr debugDescription]);